package org.apache.maven.plugin.javadoc;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URI;
  import java.net.URISyntaxException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Calendar;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Properties;
  import java.util.Set;
  import java.util.StringTokenizer;
  
  import org.apache.commons.lang.ClassUtils;
  import org.apache.commons.lang.SystemUtils;
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.factory.ArtifactFactory;
  import org.apache.maven.artifact.handler.ArtifactHandler;
  import org.apache.maven.artifact.metadata.ArtifactMetadataSource;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
  import org.apache.maven.artifact.resolver.ArtifactResolutionException;
  import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
  import org.apache.maven.artifact.resolver.ArtifactResolver;
  import org.apache.maven.artifact.resolver.MultipleArtifactsNotFoundException;
  import org.apache.maven.artifact.versioning.ArtifactVersion;
  import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.javadoc.options.BootclasspathArtifact;
  import org.apache.maven.plugin.javadoc.options.DocletArtifact;
  import org.apache.maven.plugin.javadoc.options.Group;
  import org.apache.maven.plugin.javadoc.options.JavadocPathArtifact;
  import org.apache.maven.plugin.javadoc.options.OfflineLink;
  import org.apache.maven.plugin.javadoc.options.ResourcesArtifact;
  import org.apache.maven.plugin.javadoc.options.Tag;
  import org.apache.maven.plugin.javadoc.options.Taglet;
  import org.apache.maven.plugin.javadoc.options.TagletArtifact;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.MavenProjectBuilder;
  import org.apache.maven.project.ProjectBuildingException;
  import org.apache.maven.project.artifact.InvalidDependencyVersionException;
  import org.apache.maven.reporting.MavenReportException;
  import org.apache.maven.settings.Proxy;
  import org.apache.maven.settings.Settings;
  import org.apache.maven.toolchain.Toolchain;
  import org.apache.maven.toolchain.ToolchainManager;
  import org.apache.maven.wagon.PathUtils;
  import org.codehaus.plexus.archiver.ArchiverException;
  import org.codehaus.plexus.archiver.UnArchiver;
  import org.codehaus.plexus.archiver.manager.ArchiverManager;
  import org.codehaus.plexus.archiver.manager.NoSuchArchiverException;
  import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
  import org.codehaus.plexus.util.FileUtils;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  import org.codehaus.plexus.util.cli.DefaultConsumer;
  
  /**
   * Base class with majority of Javadoc functionalities.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   * @version $Id: AbstractJavadocMojo.html 829389 2012-08-19 17:23:07Z hboutemy $
   * @since 2.0
   * @requiresDependencyResolution compile
  */
 public abstract class AbstractJavadocMojo
     extends AbstractMojo
 {
     /** The Javadoc script file name when <code>debug</code> parameter is on, i.e. javadoc.bat or javadoc.sh */
     protected static final String DEBUG_JAVADOC_SCRIPT_NAME =
         "javadoc." + ( SystemUtils.IS_OS_WINDOWS ? "bat" : "sh" );
 
     /** The <code>options</code> file name in the output directory when calling:
      * <code>javadoc.exe(or .sh) &#x40;options &#x40;packages | &#x40;argfile | &#x40;files</code> */
     protected static final String OPTIONS_FILE_NAME = "options";
 
     /** The <code>packages</code> file name in the output directory when calling:
      * <code>javadoc.exe(or .sh) &#x40;options &#x40;packages | &#x40;argfile | &#x40;files</code> */
     protected static final String PACKAGES_FILE_NAME = "packages";
 
     /** The <code>argfile</code> file name in the output directory when calling:
      * <code>javadoc.exe(or .sh) &#x40;options &#x40;packages | &#x40;argfile | &#x40;files</code> */
     protected static final String ARGFILE_FILE_NAME = "argfile";
 
     /** The <code>files</code> file name in the output directory when calling:
      * <code>javadoc.exe(or .sh) &#x40;options &#x40;packages | &#x40;argfile | &#x40;files</code> */
     protected static final String FILES_FILE_NAME = "files";
 
     /** The current class directory */
     private static final String RESOURCE_DIR = ClassUtils.getPackageName( JavadocReport.class ).replace( '.', '/' );
 
     /** Default css file name */
     private static final String DEFAULT_CSS_NAME = "stylesheet.css";
 
     /** Default location for css */
     private static final String RESOURCE_CSS_DIR = RESOURCE_DIR + "/css";
 
     /**
      * For Javadoc options appears since Java 1.4.
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">
      * What's New in Javadoc 1.4</a>
      * @since 2.1
      */
     private static final float SINCE_JAVADOC_1_4 = 1.4f;
 
     /**
      * For Javadoc options appears since Java 1.4.2.
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.2.html#commandlineoptions">
      * What's New in Javadoc 1.4.2</a>
      * @since 2.1
      */
     private static final float SINCE_JAVADOC_1_4_2 = 1.42f;
 
     /**
      * For Javadoc options appears since Java 5.0.
      * See <a href="http://java.sun.com/j2se/1.5.0/docs/guide/javadoc/whatsnew-1.5.0.html#commandlineoptions">
      * What's New in Javadoc 5.0</a>
      * @since 2.1
      */
     private static final float SINCE_JAVADOC_1_5 = 1.5f;
 
     /**
      * For Javadoc options appears since Java 6.0.
      * See <a href="http://java.sun.com/javase/6/docs/technotes/guides/javadoc/index.html">
      * Javadoc Technology</a>
      * @since 2.4
      */
     private static final float SINCE_JAVADOC_1_6 = 1.6f;
 
     // ----------------------------------------------------------------------
     // Mojo components
     // ----------------------------------------------------------------------
 
     /**
      * Archiver manager
      *
      * @since 2.5
      * @component
      */
     private ArchiverManager archiverManager;
 
     /**
      * Factory for creating artifact objects
      *
      * @component
      */
     private ArtifactFactory factory;
 
     /**
      * Used to resolve artifacts of aggregated modules
      *
      * @since 2.1
      * @component
      */
     private ArtifactMetadataSource artifactMetadataSource;
 
     /**
      * Used for resolving artifacts
      *
      * @component
      */
     private ArtifactResolver resolver;
 
     /**
      * Project builder
      *
      * @since 2.5
      * @component
      */
     private MavenProjectBuilder mavenProjectBuilder;
 
     // ----------------------------------------------------------------------
     // Mojo parameters
     // ----------------------------------------------------------------------
 
     /**
      * The current build session instance. This is used for
      * toolchain manager API calls.
      *
      * @parameter expression="${session}"
      * @required
      * @readonly
      */
     private MavenSession session;
 
     /**
      * The Maven Settings.
      *
      * @since 2.3
      * @parameter default-value="${settings}"
      * @required
      * @readonly
      */
     private Settings settings;
 
     /**
      * The Maven Project Object
      *
      * @parameter expression="${project}"
      * @required
      * @readonly
      */
     protected MavenProject project;
 
     /**
      * Specify if the Javadoc should operate in offline mode.
      *
      * @parameter default-value="${settings.offline}"
      * @required
      * @readonly
      */
     private boolean isOffline;
 
     /**
      * Specifies the Javadoc resources directory to be included in the Javadoc (i.e. package.html, images...).
      * <br/>
      * Could be used in addition of <code>docfilessubdirs</code> parameter.
      * <br/>
      * See <a href="#docfilessubdirs">docfilessubdirs</a>.
      *
      * @since 2.1
      * @parameter expression="${basedir}/src/main/javadoc"
      * @see #docfilessubdirs
      */
     private File javadocDirectory;
 
     /**
      * Set an additional parameter(s) on the command line. This value should include quotes as necessary for
      * parameters that include spaces. Useful for a custom doclet.
      *
      * @parameter expression="${additionalparam}"
      */
     private String additionalparam;
 
     /**
      * Set an additional Javadoc option(s) (i.e. JVM options) on the command line.
      * Example:
      * <pre>
      * &lt;additionalJOption&gt;-J-Xss128m&lt;/additionalJOption&gt;
      * </pre>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#J">Jflag</a>.
      * <br/>
      * See <a href="http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp">vmoptions</a>.
      *
      * @since 2.3
      * @parameter expression="${additionalJOption}"
      */
     private String additionalJOption;
 
     /**
      * A list of artifacts containing resources which should be copied into the
      * Javadoc output directory (like stylesheets, icons, etc.).
      * <br/>
      * Example:
      * <pre>
      * &lt;resourcesArtifacts&gt;
      * &nbsp;&nbsp;&lt;resourcesArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;external.group.id&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;external-resources&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;1.0&lt;/version&gt;
      * &nbsp;&nbsp;&lt;/resourcesArtifact&gt;
      * &lt;/resourcesArtifacts&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/ResourcesArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @since 2.5
      * @parameter expression="${resourcesArtifacts}"
      */
     private ResourcesArtifact[] resourcesArtifacts;
 
     /**
      * The local repository where the artifacts are located.
      *
      * @parameter expression="${localRepository}"
      */
     private ArtifactRepository localRepository;
 
     /**
      * The remote repositories where artifacts are located.
      *
      * @parameter expression="${project.remoteArtifactRepositories}"
      */
     private List remoteRepositories;
 
     /**
      * The projects in the reactor for aggregation report.
      *
      * @parameter expression="${reactorProjects}"
      * @readonly
      */
     private List reactorProjects;
 
     /**
      * Whether to build an aggregated report at the root, or build individual reports.
      * 
      * @parameter expression="${aggregate}" default-value="false"
      * @deprecated As of version 2.5, use the goals <code>javadoc:aggregate</code> and
      *             <code>javadoc:test-aggregate</code> instead.
      */
     protected boolean aggregate;
 
     /**
      * Set this to 'true' to debug Javadoc plugin. With this, 'options' and 'files' files are provided.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${debug}" default-value="false"
      */
     private boolean debug;
 
     /**
      * Sets the absolute path of the Javadoc Tool executable to use. Since version 2.5, a mere directory specification
      * is sufficient to have the plugin use "javadoc" or "javadoc.exe" respectively from this directory.
      *
      * @since 2.3
      * @parameter expression="${javadocExecutable}"
      */
     private String javadocExecutable;
 
     /**
      * Version of the Javadoc Tool executable to use, ex. "1.3", "1.5".
      *
      * @since 2.3
      * @parameter expression="${javadocVersion}"
      */
     private String javadocVersion;
 
     /**
      * Version of the Javadoc Tool executable to use as float.
      */
     private float fJavadocVersion = 0.0f;
 
     /**
      * Specifies whether the Javadoc generation should be skipped.
      *
      * @since 2.5
      * @parameter expression="${maven.javadoc.skip}" default-value="false"
      */
     protected boolean skip;
 
     /**
      * Specifies whether the build will continue even if there are errors.
      *
      * @parameter expression="${maven.javadoc.failOnError}" default-value="true"
      * @since 2.5
      */
     protected boolean failOnError;
 
     /**
      * Specifies to use the <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#standard">
      * options provided by the Standard Doclet</a> for a custom doclet.
      * <br/>
      * Example:
      * <pre>
      * &lt;docletArtifacts&gt;
      * &nbsp;&nbsp;&lt;docletArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;com.sun.tools.doclets&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;doccheck&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;1.2b2&lt;/version&gt;
      * &nbsp;&nbsp;&lt;/docletArtifact&gt;
      * &lt;/docletArtifacts&gt;
      * &lt;useStandardDocletOptions&gt;true&lt;/useStandardDocletOptions&gt;
      * </pre>
      *
      * @parameter expression="${useStandardDocletOptions}" default-value="true"
      * @since 2.5
      */
     protected boolean useStandardDocletOptions;
 
     // ----------------------------------------------------------------------
     // Javadoc Options - all alphabetical
     // ----------------------------------------------------------------------
 
     /**
      * Specifies the paths where the boot classes reside.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#bootclasspath">bootclasspath</a>.
      * <br/>
      *
      * @parameter expression="${bootclasspath}"
      * @since 2.5
      */
     private String bootclasspath;
 
     /**
      * Specifies the artifacts where the boot classes reside.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#bootclasspath">bootclasspath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;bootclasspathArtifacts&gt;
      * &nbsp;&nbsp;&lt;bootclasspathArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;my-groupId&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;my-artifactId&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;my-version&lt;/version&gt;
      * &nbsp;&nbsp;&lt;/bootclasspathArtifact&gt;
      * &lt;/bootclasspathArtifacts&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/BootclasspathArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @parameter expression="${bootclasspathArtifacts}"
      * @since 2.5
      */
     private BootclasspathArtifact[] bootclasspathArtifacts;
 
     /**
      * Uses the sentence break iterator to determine the end of the first sentence.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#breakiterator">breakiterator</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      * <br/>
      *
      * @parameter expression="${breakiterator}" default-value="false"
      */
     private boolean breakiterator;
 
     /**
      * Specifies the class file that starts the doclet used in generating the documentation.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#doclet">doclet</a>.
      *
      * @parameter expression="${doclet}"
      */
     private String doclet;
 
     /**
      * Specifies the artifact containing the doclet starting class file (specified with the -doclet option).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#docletpath">docletpath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;docletArtifact&gt;
      * &nbsp;&nbsp;&lt;groupId&gt;com.sun.tools.doclets&lt;/groupId&gt;
      * &nbsp;&nbsp;&lt;artifactId&gt;doccheck&lt;/artifactId&gt;
      * &nbsp;&nbsp;&lt;version&gt;1.2b2&lt;/version&gt;
      * &lt;/docletArtifact&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/DocletArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @parameter expression="${docletArtifact}"
      */
     private DocletArtifact docletArtifact;
 
     /**
      * Specifies multiple artifacts containing the path for the doclet starting class file (specified with the
      *  -doclet option).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#docletpath">docletpath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;docletArtifacts&gt;
      * &nbsp;&nbsp;&lt;docletArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;com.sun.tools.doclets&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;doccheck&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;1.2b2&lt;/version&gt;
      * &nbsp;&nbsp;&lt;/docletArtifact&gt;
      * &lt;/docletArtifacts&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/DocletArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${docletArtifacts}"
      */
     private DocletArtifact[] docletArtifacts;
 
     /**
      * Specifies the path to the doclet starting class file (specified with the -doclet option) and any jar files
      * it depends on. The docletPath can contain multiple paths by separating them with a colon (<code>:</code>)
      * on Solaris and a semi-colon (<code>;</code>) on Windows.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#docletpath">docletpath</a>.
      *
      * @parameter expression="${docletPath}"
      */
     private String docletPath;
 
     /**
      * Specifies the encoding name of the source files. If not specificed, the encoding value will be the value of the
      * <code>file.encoding</code> system property.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#encoding">encoding</a>.
      * <br/>
      * <b>Note</b>: In 2.4, the default value was locked to <code>ISO-8859-1</code> to ensure reproducing build, but
      * this was reverted in 2.5.
      * <br/>
      *
      * @parameter expression="${encoding}" default-value="${project.build.sourceEncoding}"
      */
     private String encoding;
 
     /**
      * Unconditionally excludes the specified packages and their subpackages from the list formed by -subpackages.
      * Multiple packages can be separated by colons (<code>:</code>).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#exclude">exclude</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${excludePackageNames}"
      */
     private String excludePackageNames;
 
     /**
      * Specifies the directories where extension classes reside. Separate directories in dirlist with a colon
      * (<code>:</code>) on Solaris and a semi-colon (<code>;</code>) on Windows.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#extdirs">extdirs</a>.
      *
      * @parameter expression="${extdirs}"
      */
     private String extdirs;
 
     /**
      * Specifies the locale that javadoc uses when generating documentation.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#locale">locale</a>.
      *
      * @parameter expression="${locale}"
      */
     private String locale;
 
     /**
      * Specifies the maximum Java heap size to be used when launching the Javadoc tool.
      * JVMs refer to this property as the <code>-Xmx</code> parameter. Example: '512' or '512m'.
      * The memory unit depends on the JVM used. The units supported could be: <code>k</code>, <code>kb</code>,
      * <code>m</code>, <code>mb</code>, <code>g</code>, <code>gb</code>, <code>t</code>, <code>tb</code>.
      *  If no unit specified, the default unit is <code>m</code>.
      *
      * @parameter expression="${maxmemory}"
      */
     private String maxmemory;
 
     /**
      * Specifies the minimum Java heap size to be used when launching the Javadoc tool.
      * JVMs refer to this property as the <code>-Xms</code> parameter. Example: '512' or '512m'.
      * The memory unit depends on the JVM used. The units supported could be: <code>k</code>, <code>kb</code>,
      * <code>m</code>, <code>mb</code>, <code>g</code>, <code>gb</code>, <code>t</code>, <code>tb</code>.
      *  If no unit specified, the default unit is <code>m</code>.
      *
      * @parameter expression="${minmemory}"
      */
     private String minmemory;
 
     /**
      * This option creates documentation with the appearance and functionality of documentation generated by
      * Javadoc 1.1.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#1.1">1.1</a>.
      * <br/>
      *
      * @parameter expression="${old}" default-value="false"
      */
     private boolean old;
 
     /**
      * Specifies that javadoc should retrieve the text for the overview documentation from the "source" file
      * specified by path/filename and place it on the Overview page (overview-summary.html).
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;nooverview/&gt;.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#overview">overview</a>.
      * <br/>
      *
      * @parameter expression="${overview}" default-value="${basedir}/src/main/javadoc/overview.html"
      */
     private File overview;
 
     /**
      * Specifies the proxy host where the javadoc web access in <code>-link</code> would pass through.
      * It defaults to the proxy host of the active proxy set in the <code>settings.xml</code>, otherwise it gets the
      * proxy configuration set in the pom.
      * <br/>
      *
      * @parameter expression="${proxyHost}" default-value="${settings.activeProxy.host}"
      * @deprecated since 2.4. Instead of, configure an active proxy host in <code>settings.xml</code>.
      */
     private String proxyHost;
 
     /**
      * Specifies the proxy port where the javadoc web access in <code>-link</code> would pass through.
      * It defaults to the proxy port of the active proxy set in the <code>settings.xml</code>, otherwise it gets the
      * proxy configuration set in the pom.
      * <br/>
      *
      * @parameter expression="${proxyPort}" default-value="${settings.activeProxy.port}"
      * @deprecated since 2.4. Instead of, configure an active proxy port in <code>settings.xml</code>.
      */
     private int proxyPort;
 
     /**
      * Shuts off non-error and non-warning messages, leaving only the warnings and errors appear, making them
      * easier to view.
      * <br/>
      * Note: was a standard doclet in Java 1.4.2 (refer to bug ID
      * <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4714350">4714350</a>).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javadoc.html#quiet">quiet</a>.
      * <br/>
      * Since Java 5.0.
      * <br/>
      *
      * @parameter expression="${quiet}" default-value="false"
      */
     private boolean quiet;
 
     /**
      * Specifies the access level for classes and members to show in the Javadocs.
      * Possible values are:
      * <ul>
      * <li><a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#public">public</a>
      * (shows only public classes and members)</li>
      * <li><a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#protected">protected</a>
      * (shows only public and protected classes and members)</li>
      * <li><a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#package">package</a>
      * (shows all classes and members not marked private)</li>
      * <li><a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#private">private</a>
      * (shows all classes and members)</li>
      * </ul>
      * <br/>
      *
      * @parameter expression="${show}" default-value="protected"
      */
     private String show;
 
     /**
      * Necessary to enable javadoc to handle assertions present in J2SE v 1.4 source code.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#source">source</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${source}"
      */
     private String source;
 
     /**
      * Specifies the source paths where the subpackages are located. The paths are separated with a colon
      * (<code>:</code>) on Solaris and a semi-colon (<code>;</code>) on Windows.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#sourcepath">sourcepath</a>.
      *
      * @parameter expression="${sourcepath}"
      */
     private String sourcepath;
 
     /**
      * Specifies the package directory where javadoc will be executed. Multiple packages can be separated by
      * colons (<code>:</code>).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#subpackages">subpackages</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${subpackages}"
      */
     private String subpackages;
 
     /**
      * Provides more detailed messages while javadoc is running.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#verbose">verbose</a>.
      * <br/>
      *
      * @parameter expression="${verbose}" default-value="false"
      */
     private boolean verbose;
 
     // ----------------------------------------------------------------------
     // Standard Doclet Options - all alphabetical
     // ----------------------------------------------------------------------
 
     /**
      * Specifies whether or not the author text is included in the generated Javadocs.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#author">author</a>.
      * <br/>
      *
      * @parameter expression="${author}" default-value="true"
      */
     private boolean author;
 
     /**
      * Specifies the text to be placed at the bottom of each output file.<br/>
      * If you want to use html you have to put it in a CDATA section, <br/>
      * eg. <code>&lt;![CDATA[Copyright 2005, &lt;a href="http://www.mycompany.com">MyCompany, Inc.&lt;a>]]&gt;</code>
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#bottom">bottom</a>.
      * <br/>
      *
      * @parameter expression="${bottom}"
      * default-value="Copyright &#169; {inceptionYear}-{currentYear} {organizationName}. All Rights Reserved."
      */
     private String bottom;
 
     /**
      * Specifies the HTML character set for this document. If not specificed, the charset value will be the value of
      * the <code>docencoding</code> parameter.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#charset">charset</a>.
      * <br/>
      *
      * @parameter expression="${charset}"
      */
     private String charset;
 
     /**
      * Specifies the encoding of the generated HTML files. If not specificed, the docencoding value will be
      * <code>UTF-8</code>.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#docencoding">docencoding</a>.
      *
      * @parameter expression="${docencoding}" default-value="${project.reporting.outputEncoding}"
      */
     private String docencoding;
 
     /**
      * Enables deep copying of "doc-files" directories.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#docfilessubdirs">
      * docfilessubdirs</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      * <br/>
      * See <a href="#javadocDirectory">javadocDirectory</a>.
      * <br/>
      *
      * @parameter expression="${docfilessubdirs}" default-value="false"
      * @see #excludedocfilessubdir
      * @see #javadocDirectory
      */
     private boolean docfilessubdirs;
 
     /**
      * Specifies the title to be placed near the top of the overview summary file.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#doctitle">doctitle</a>.
      * <br/>
      *
      * @parameter expression="${doctitle}" default-value="${project.name} ${project.version} API"
      */
     private String doctitle;
 
     /**
      * Excludes any "doc-files" subdirectories with the given names. Multiple patterns can be excluded
      * by separating them with colons (<code>:</code>).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#excludedocfilessubdir">
      * excludedocfilessubdir</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${excludedocfilessubdir}"
      * @see #docfilessubdirs
      */
     private String excludedocfilessubdir;
 
     /**
      * Specifies the footer text to be placed at the bottom of each output file.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#footer">footer</a>.
      *
      * @parameter expression="${footer}"
      */
     private String footer;
 
     /**
      * Separates packages on the overview page into whatever groups you specify, one group per table. The
      * packages pattern can be any package name, or can be the start of any package name followed by an asterisk
      * (<code>*</code>) meaning "match any characters". Multiple patterns can be included in a group
      * by separating them with colons (<code>:</code>).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#group">group</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;groups&gt;
      * &nbsp;&nbsp;&lt;group&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;title&gt;Core Packages&lt;/title&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;packages&gt;org.apache.core&lt;/packages&gt;
      * &nbsp;&nbsp;&lt;/group&gt;
      * &lt;/groups&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/Group.html">Javadoc</a>.
      * <br/>
      *
      * @parameter expression="${groups}"
      */
     private Group[] groups;
 
     /**
      * Specifies the header text to be placed at the top of each output file.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#header">header</a>.
      *
      * @parameter expression="${header}"
      */
     private String header;
 
     /**
      * Specifies the path of an alternate help file path\filename that the HELP link in the top and bottom
      * navigation bars link to.
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;nohelp/&gt;.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#helpfile">helpfile</a>.
      *
      * @parameter expression="${helpfile}"
      */
     private String helpfile;
 
     /**
      * Adds HTML meta keyword tags to the generated file for each class.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javadoc.html#keywords">keywords</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.2.html#commandlineoptions">
      * Java 1.4.2</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.5.0/docs/guide/javadoc/whatsnew-1.5.0.html#commandlineoptions">
      * Java 5.0</a>.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${keywords}" default-value="false"
      */
     private boolean keywords;
 
     /**
      * Creates links to existing javadoc-generated documentation of external referenced classes.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#link">link</a>.
      *
      * @parameter expression="${links}"
      */
     protected ArrayList links;
 
     /**
      * Creates an HTML version of each source file (with line numbers) and adds links to them from the standard
      * HTML documentation.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#linksource">linksource</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      * <br/>
      *
      * @parameter expression="${linksource}" default-value="false"
      */
     private boolean linksource;
 
     /**
      * Suppress the entire comment body, including the main description and all tags, generating only declarations.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nocomment">nocomment</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      * <br/>
      *
      * @parameter expression="${nocomment}" default-value="false"
      */
     private boolean nocomment;
 
     /**
      * Prevents the generation of any deprecated API at all in the documentation.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nodeprecated">nodeprecated</a>.
      * <br/>
      *
      * @parameter expression="${nodeprecated}" default-value="false"
      */
     private boolean nodeprecated;
 
     /**
      * Prevents the generation of the file containing the list of deprecated APIs (deprecated-list.html) and the
      * link in the navigation bar to that page.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nodeprecatedlist">
      * nodeprecatedlist</a>.
      * <br/>
      *
      * @parameter expression="${nodeprecatedlist}" default-value="false"
      */
     private boolean nodeprecatedlist;
 
     /**
      * Omits the HELP link in the navigation bars at the top and bottom of each page of output.
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;helpfile/&gt;.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nohelp">nohelp</a>.
      * <br/>
      *
      * @parameter expression="${nohelp}" default-value="false"
      */
     private boolean nohelp;
 
     /**
      * Omits the index from the generated docs.
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;splitindex/&gt;.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#noindex">noindex</a>.
      * <br/>
      *
      * @parameter expression="${noindex}" default-value="false"
      */
     private boolean noindex;
 
     /**
      * Omits the navigation bar from the generated docs.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nonavbar">nonavbar</a>.
      * <br/>
      *
      * @parameter expression="${nonavbar}" default-value="false"
      */
     private boolean nonavbar;
 
     /**
      * Omits the entire overview page from the generated docs.
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;overview/&gt;.
      * <br/>
      * Standard Doclet undocumented option.
      * <br/>
      *
      * @since 2.4
      * @parameter expression="${nooverview}" default-value="false"
      */
     private boolean nooverview;
 
     /**
      * Omits qualifying package name from ahead of class names in output.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#noqualifier">noqualifier</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${noqualifier}"
      */
     private String noqualifier;
 
     /**
      * Omits from the generated docs the "Since" sections associated with the since tags.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#nosince">nosince</a>.
      * <br/>
      *
      * @parameter expression="${nosince}" default-value="false"
      */
     private boolean nosince;
 
     /**
      * Suppresses the timestamp, which is hidden in an HTML comment in the generated HTML near the top of each page.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/javadoc.html#notimestamp">notimestamp</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.5.0/docs/guide/javadoc/whatsnew-1.5.0.html#commandlineoptions">
      * Java 5.0</a>.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${notimestamp}" default-value="false"
      */
     private boolean notimestamp;
 
     /**
      * Omits the class/interface hierarchy pages from the generated docs.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#notree">notree</a>.
      * <br/>
      *
      * @parameter expression="${notree}" default-value="false"
      */
     private boolean notree;
 
     /**
      * This option is a variation of -link; they both create links to javadoc-generated documentation for external
      * referenced classes.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#linkoffline">linkoffline</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;offlineLinks&gt;
      * &nbsp;&nbsp;&lt;offlineLink&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;url&gt;http://java.sun.com/j2se/1.5.0/docs/api/&lt;/url&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;location&gt;../javadoc/jdk-5.0/&lt;/location&gt;
      * &nbsp;&nbsp;&lt;/offlineLink&gt;
      * &lt;/offlineLinks&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/OfflineLink.html">Javadoc</a>.
      * <br/>
      *
      * @parameter expression="${offlineLinks}"
      */
     private OfflineLink[] offlineLinks;
 
     /**
      * Specifies the destination directory where javadoc saves the generated HTML files.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#d">d</a>.
      * <br/>
      *
      * @parameter expression="${destDir}" alias="destDir" default-value="${project.build.directory}/apidocs"
      * @required
      */
     protected File outputDirectory;
 
     /**
      * Specify the text for upper left frame.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.2.html#commandlineoptions">
      * Java 1.4.2</a>.
      *
      * @since 2.1
      * @parameter expression="${packagesheader}"
      */
     private String packagesheader;
 
     /**
      * Generates compile-time warnings for missing serial tags.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#serialwarn">serialwarn</a>
      * <br/>
      *
      * @parameter expression="${serialwarn}" default-value="false"
      */
     private boolean serialwarn;
 
     /**
      * Specify the number of spaces each tab takes up in the source. If no tab is used in source, the default
      * space is used.
      * <br/>
      * Note: was <code>linksourcetab</code> in Java 1.4.2 (refer to bug ID
      * <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4788919">4788919</a>).
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.2.html#commandlineoptions">
      * 1.4.2</a>.
      * <br/>
      * Since Java 5.0.
      *
      * @since 2.1
      * @parameter expression="${sourcetab}" alias="linksourcetab"
      */
     private int sourcetab;
 
     /**
      * Splits the index file into multiple files, alphabetically, one file per letter, plus a file for any index
      * entries that start with non-alphabetical characters.
      * <br/>
      * <b>Note</b>: could be in conflict with &lt;noindex/&gt;.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#splitindex">splitindex</a>.
      * <br/>
      *
      * @parameter expression="${splitindex}" default-value="false"
      */
     private boolean splitindex;
 
     /**
      * Specifies whether the stylesheet to be used is the maven javadoc stylesheet or java's default stylesheet
      * when a <i>stylesheetfile</i> parameter is not specified. Possible values: "maven" or "java".
      * <br/>
      *
      * @parameter expression="${stylesheet}" default-value="java"
      */
     private String stylesheet;
 
     /**
      * Specifies the path of an alternate HTML stylesheet file.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#stylesheetfile">
      * stylesheetfile</a>.
      *
      * @parameter expression="${stylesheetfile}"
      */
     private String stylesheetfile;
 
     /**
      * Specifies the class file that starts the taglet used in generating the documentation for that tag.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#taglet">taglet</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${taglet}"
      */
     private String taglet;
 
     /**
      * Specifies the Taglet artifact containing the taglet class files (.class).
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#tagletpath">tagletpath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;taglets&gt;
      * &nbsp;&nbsp;&lt;taglet&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;tagletClass&gt;com.sun.tools.doclets.ToDoTaglet&lt;/tagletClass&gt;
      * &nbsp;&nbsp;&lt;/taglet&gt;
      * &nbsp;&nbsp;&lt;taglet&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;tagletClass&gt;package.to.AnotherTagletClass&lt;/tagletClass&gt;
      * &nbsp;&nbsp;&lt;/taglet&gt;
      * &nbsp;&nbsp;...
      * &lt;/taglets&gt;
      * &lt;tagletArtifact&gt;
      * &nbsp;&nbsp;&lt;groupId&gt;group-Taglet&lt;/groupId&gt;
      * &nbsp;&nbsp;&lt;artifactId&gt;artifact-Taglet&lt;/artifactId&gt;
      * &nbsp;&nbsp;&lt;version&gt;version-Taglet&lt;/version&gt;
      * &lt;/tagletArtifact&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/TagletArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${tagletArtifact}"
      */
     private TagletArtifact tagletArtifact;
 
     /**
      * Specifies several Taglet artifacts containing the taglet class files (.class). These taglets class names will be
      * auto-detect and so no need to specify them.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#taglet">taglet</a>.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#tagletpath">tagletpath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;tagletArtifacts&gt;
      * &nbsp;&nbsp;&lt;tagletArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;group-Taglet&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;artifact-Taglet&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;version-Taglet&lt;/version&gt;
      * &nbsp;&nbsp;&lt;/tagletArtifact&gt;
      * &nbsp;&nbsp;...
      * &lt;/tagletArtifacts&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/TagletArtifact.html">Javadoc</a>.
      * <br/>
      *
      * @since 2.5
      * @parameter expression="${tagletArtifacts}"
      */
     private TagletArtifact[] tagletArtifacts;
 
     /**
      * Specifies the search paths for finding taglet class files (.class). The tagletPath can contain
      * multiple paths by separating them with a colon (<code>:</code>) on Solaris and a semi-colon (<code>;</code>)
      * on Windows.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#tagletpath">tagletpath</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      *
      * @parameter expression="${tagletpath}"
      */
     private String tagletpath;
 
     /**
      * Enables the Javadoc tool to interpret multiple taglets.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#taglet">taglet</a>.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#tagletpath">tagletpath</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;taglets&gt;
      * &nbsp;&nbsp;&lt;taglet&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;tagletClass&gt;com.sun.tools.doclets.ToDoTaglet&lt;/tagletClass&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;!--&lt;tagletpath&gt;/home/taglets&lt;/tagletpath&gt;--&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;tagletArtifact&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;group-Taglet&lt;/groupId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;artifact-Taglet&lt;/artifactId&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;version-Taglet&lt;/version&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;/tagletArtifact&gt;
      * &nbsp;&nbsp;&lt;/taglet&gt;
      * &lt;/taglets&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/Taglet.html">Javadoc</a>.
      * <br/>
      *
      * @since 2.1
      * @parameter expression="${taglets}"
      */
     private Taglet[] taglets;
 
     /**
      * Enables the Javadoc tool to interpret a simple, one-argument custom block tag tagname in doc comments.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#tag">tag</a>.
      * <br/>
      * Since <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#summary">Java 1.4</a>.
      * <br/>
      * Example:
      * <pre>
      * &lt;tags&gt;
      * &nbsp;&nbsp;&lt;tag&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;name&gt;todo&lt;/name&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;placement&gt;a&lt;/placement&gt;
      * &nbsp;&nbsp;&nbsp;&nbsp;&lt;head&gt;To Do:&lt;/head&gt;
      * &nbsp;&nbsp;&lt;/tag&gt;
      * &lt;/tags&gt;
      * </pre>
      * <br/>
      * See <a href="./apidocs/org/apache/maven/plugin/javadoc/options/Tag.html">Javadoc</a>.
      * <br/>
      *
      * @parameter expression="${tags}"
      */
     private Tag[] tags;
 
     /**
      * Specifies the top text to be placed at the top of each output file.
      * <br/>
      * See <a href="http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6227616">6227616</a>.
      * <br/>
      * Since Java 6.0
      *
      * @since 2.4
      * @parameter expression="${top}"
      */
     private String top;
 
     /**
      * Includes one "Use" page for each documented class and package.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#use">use</a>.
      * <br/>
      *
      * @parameter expression="${use}" default-value="true"
      */
     private boolean use;
 
     /**
      * Includes the version text in the generated docs.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#version">version</a>.
      * <br/>
      *
      * @parameter expression="${version}" default-value="true"
      */
     private boolean version;
 
     /**
      * Specifies the title to be placed in the HTML title tag.
      * <br/>
      * See <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#windowtitle">windowtitle</a>.
      * <br/>
      *
      * @parameter expression="${windowtitle}" default-value="${project.name} ${project.version} API"
      */
     private String windowtitle;
 
     // ----------------------------------------------------------------------
     // protected methods
     // ----------------------------------------------------------------------
 
     /**
      * Indicates whether this goal is flagged with <code>@aggregator</code>.
      *
      * @return <code>true</code> if the goal is designed as an aggregator, <code>false</code> otherwise.
      * @see AggregatorJavadocReport
      * @see AggregatorTestJavadocReport
      */
     protected boolean isAggregator()
     {
         return false;
     }
 
     /**
      * @return the output directory
      */
     protected String getOutputDirectory()
     {
         return outputDirectory.getAbsoluteFile().toString();
     }
 
     /**
      * @param p not null maven project
      * @return the list of directories where compiled classes are placed for the given project. These dirs are
      * added in the javadoc classpath.
      */
     protected List getProjectBuildOutputDirs( MavenProject p )
     {
         if ( StringUtils.isEmpty( p.getBuild().getOutputDirectory() ) )
         {
             return Collections.EMPTY_LIST;
         }
 
         return Collections.singletonList( p.getBuild().getOutputDirectory() );
     }
 
     /**
      * @param p not null maven project
      * @return the list of source paths for the given project
      */
     protected List getProjectSourceRoots( MavenProject p )
     {
         if ( "pom".equals( p.getPackaging().toLowerCase() ) )
         {
             return Collections.EMPTY_LIST;
         }
 
         return p.getCompileSourceRoots();
     }
 
     /**
      * @param p not null maven project
      * @return the list of source paths for the execution project of the given project
      */
     protected List getExecutionProjectSourceRoots( MavenProject p )
     {
         if ( "pom".equals( p.getExecutionProject().getPackaging().toLowerCase() ) )
         {
             return Collections.EMPTY_LIST;
         }
 
         return p.getExecutionProject().getCompileSourceRoots();
     }
 
     /**
      * @param p not null maven project
      * @return the list of artifacts for the given project
      */
     protected List getProjectArtifacts( MavenProject p )
     {
         return p.getCompileArtifacts();
     }
 
     /**
      * @return the current javadoc directory
      */
     protected File getJavadocDirectory()
     {
         return javadocDirectory;
     }
 
     /**
      * @return the title to be placed near the top of the overview summary file
      */
     protected String getDoctitle()
     {
         return doctitle;
     }
 
     /**
      * @return the overview documentation file from the user parameter or from the <code>javadocdirectory</code>
      */
     protected File getOverview()
     {
         return overview;
     }
 
     /**
      * @return the title to be placed in the HTML title tag
      */
     protected String getWindowtitle()
     {
         return windowtitle;
     }
 
     /**
      * @return the charset attribute or the value of {@link #getDocencoding()} if <code>null</code>.
      */
     private String getCharset()
     {
         return ( StringUtils.isEmpty( charset ) ) ? getDocencoding() : charset;
     }
 
     /**
      * @return the docencoding attribute or <code>UTF-8</code> if <code>null</code>.
      */
     private String getDocencoding()
     {
         return ( StringUtils.isEmpty( docencoding ) ) ? ReaderFactory.UTF_8 : docencoding;
     }
 
     /**
      * @return the encoding attribute or the value of <code>file.encoding</code> system property if <code>null</code>.
      */
     private String getEncoding()
     {
         return ( StringUtils.isEmpty( encoding ) ) ? ReaderFactory.FILE_ENCODING : encoding;
     }
 
     /**
      * The <a href="package-summary.html">package documentation</a> details the
      * Javadoc Options used by this Plugin.
      *
      * @param unusedLocale the wanted locale (actually unused).
      * @throws MavenReportException if any
      */
     protected void executeReport( Locale unusedLocale )
         throws MavenReportException
     {
         if ( skip )
         {
             getLog().info( "Skipping javadoc generation" );
             return;
         }
 
         if ( isAggregator() && !project.isExecutionRoot() )
         {
             return;
         }
 
         if ( getLog().isDebugEnabled() )
         {
             this.debug = true;
         }
 
         List sourcePaths = getSourcePaths();
         List files = getFiles( sourcePaths );
         if ( !canGenerateReport( files ) )
         {
             return;
         }
 
         List packageNames = getPackageNames( sourcePaths, files );
         List filesWithUnnamedPackages = getFilesWithUnnamedPackages( sourcePaths, files );
 
         // ----------------------------------------------------------------------
         // Find the javadoc executable and version
         // ----------------------------------------------------------------------
 
         String jExecutable;
         try
         {
             jExecutable = getJavadocExecutable();
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Unable to find javadoc command: " + e.getMessage(), e );
         }
         setFJavadocVersion( new File( jExecutable ) );
 
         // ----------------------------------------------------------------------
         // Javadoc output directory as File
         // ----------------------------------------------------------------------
 
         File javadocOutputDirectory = new File( getOutputDirectory() );
         if ( javadocOutputDirectory.exists() && !javadocOutputDirectory.isDirectory() )
         {
             throw new MavenReportException( "IOException: " + getOutputDirectory() + " is not a directory." );
         }
         if ( javadocOutputDirectory.exists() && !javadocOutputDirectory.canWrite() )
         {
             throw new MavenReportException( "IOException: " + getOutputDirectory() + " is not writable." );
         }
         javadocOutputDirectory.mkdirs();
 
         // ----------------------------------------------------------------------
         // Copy all resources
         // ----------------------------------------------------------------------
 
         copyAllResources( javadocOutputDirectory );
 
         // ----------------------------------------------------------------------
         // Create command line for Javadoc
         // ----------------------------------------------------------------------
 
         Commandline cmd = new Commandline();
         cmd.getShell().setQuotedArgumentsEnabled( false ); // for Javadoc JVM args
         cmd.setWorkingDirectory( javadocOutputDirectory.getAbsolutePath() );
         cmd.setExecutable( jExecutable );
 
         // ----------------------------------------------------------------------
         // Wrap Javadoc JVM args
         // ----------------------------------------------------------------------
 
         addMemoryArg( cmd, "-Xmx", this.maxmemory );
         addMemoryArg( cmd, "-Xms", this.minmemory );
         addProxyArg( cmd );
 
         if ( StringUtils.isNotEmpty( additionalJOption ) )
         {
             cmd.createArg().setValue( additionalJOption );
         }
 
         List arguments = new ArrayList();
 
         // ----------------------------------------------------------------------
         // Wrap Javadoc options
         // ----------------------------------------------------------------------
 
         addJavadocOptions( arguments, sourcePaths );
 
         // ----------------------------------------------------------------------
         // Wrap Standard doclet Options
         // ----------------------------------------------------------------------
 
         if ( StringUtils.isEmpty( doclet ) || useStandardDocletOptions )
         {
             addStandardDocletOptions( javadocOutputDirectory, arguments );
         }
 
         // ----------------------------------------------------------------------
         // Write options file and include it in the command line
         // ----------------------------------------------------------------------
 
         if ( arguments.size() > 0 )
         {
             addCommandLineOptions( cmd, arguments, javadocOutputDirectory );
         }
 
         // ----------------------------------------------------------------------
         // Write packages file and include it in the command line
         // ----------------------------------------------------------------------
 
         if ( !packageNames.isEmpty() )
         {
             addCommandLinePackages( cmd, javadocOutputDirectory, packageNames );
 
             // ----------------------------------------------------------------------
             // Write argfile file and include it in the command line
             // ----------------------------------------------------------------------
 
             if ( !filesWithUnnamedPackages.isEmpty() )
             {
                 addCommandLineArgFile( cmd, javadocOutputDirectory, filesWithUnnamedPackages );
             }
         }
         else
         {
             // ----------------------------------------------------------------------
             // Write argfile file and include it in the command line
             // ----------------------------------------------------------------------
 
             if ( !files.isEmpty() )
             {
                 addCommandLineArgFile( cmd, javadocOutputDirectory, files );
             }
         }
 
         // ----------------------------------------------------------------------
         // Execute command line
         // ----------------------------------------------------------------------
 
         executeJavadocCommandLine( cmd, javadocOutputDirectory );
     }
 
     /**
      * Method to get the files on the specified source paths
      *
      * @param sourcePaths a List that contains the paths to the source files
      * @return a List that contains the specific path for every source file
      */
     protected List getFiles( List sourcePaths )
     {
         List files = new ArrayList();
         if ( StringUtils.isEmpty( subpackages ) )
         {
             String[] excludedPackages = getExcludedPackages();
 
             for ( Iterator i = sourcePaths.iterator(); i.hasNext(); )
             {
                 File sourceDirectory = new File( (String) i.next() );
                 JavadocUtil.addFilesFromSource( files, sourceDirectory, excludedPackages );
             }
         }
 
         return files;
     }
 
     /**
      * Method to get the source paths. If no source path is specified in the parameter, the compile source roots
      * of the project will be used.
      *
      * @return a List of the project absolute source paths as <code>String</code>
      * @see JavadocUtil#pruneDirs(MavenProject, List)
      */
     protected List getSourcePaths()
     {
         List sourcePaths;
 
         if ( StringUtils.isEmpty( sourcepath ) )
         {
             sourcePaths = new ArrayList( JavadocUtil.pruneDirs( project, getProjectSourceRoots( project ) ) );
 
             if ( project.getExecutionProject() != null )
             {
                 sourcePaths.addAll( JavadocUtil.pruneDirs( project, getExecutionProjectSourceRoots( project ) ) );
             }
 
             /*
              * Should be after the source path (i.e. -sourcepath '.../src/main/java;.../src/main/javadoc') and
              * *not* the opposite. If not, the javadoc tool always copies doc files, even if -docfilessubdirs is
              * not setted.
              */
             if ( getJavadocDirectory() != null )
             {
                 File javadocDir = getJavadocDirectory();
                 if ( javadocDir.exists() && javadocDir.isDirectory() )
                 {
                     List l =
                         JavadocUtil.pruneDirs( project,
                                                Collections.singletonList( getJavadocDirectory().getAbsolutePath() ) );
                     sourcePaths.addAll( l );
                 }
             }
 
             if ( isAggregator() && project.isExecutionRoot() )
             {
                 for ( Iterator i = reactorProjects.iterator(); i.hasNext(); )
                 {
                     MavenProject subProject = (MavenProject) i.next();
 
                     if ( subProject != project )
                     {
                         List sourceRoots = getProjectSourceRoots( subProject );
 
                         if ( subProject.getExecutionProject() != null )
                         {
                             sourceRoots.addAll( getExecutionProjectSourceRoots( subProject ) );
                         }
 
                         ArtifactHandler artifactHandler = subProject.getArtifact().getArtifactHandler();
                         if ( "java".equals( artifactHandler.getLanguage() ) )
                         {
                             sourcePaths.addAll( JavadocUtil.pruneDirs( subProject, sourceRoots ) );
                         }
 
                         String javadocDirRelative =
                             PathUtils.toRelative( project.getBasedir(), getJavadocDirectory().getAbsolutePath() );
                         File javadocDir = new File( subProject.getBasedir(), javadocDirRelative );
                         if ( javadocDir.exists() && javadocDir.isDirectory() )
                         {
                             List l =
                                 JavadocUtil.pruneDirs( subProject,
                                                        Collections.singletonList( javadocDir.getAbsolutePath() ) );
                             sourcePaths.addAll( l );
                         }
                     }
                 }
             }
         }
         else
         {
             sourcePaths = new ArrayList( Arrays.asList( sourcepath.split( "[;]" ) ) );
             sourcePaths = JavadocUtil.pruneDirs( project, sourcePaths );
             if ( getJavadocDirectory() != null )
             {
                 List l =
                     JavadocUtil.pruneDirs( project,
                                            Collections.singletonList( getJavadocDirectory().getAbsolutePath() ) );
                 sourcePaths.addAll( l );
             }
         }
 
         sourcePaths = JavadocUtil.pruneDirs( project, sourcePaths );
 
         return sourcePaths;
     }
 
     /**
      * Method that indicates whether the javadoc can be generated or not. If the project does not contain any source
      * files and no subpackages are specified, the plugin will terminate.
      *
      * @param files the project files
      * @return a boolean that indicates whether javadoc report can be generated or not
      */
     protected boolean canGenerateReport( List files )
     {
         boolean canGenerate = true;
 
         if ( files.isEmpty() && StringUtils.isEmpty( subpackages ) )
         {
             canGenerate = false;
         }
 
         return canGenerate;
     }
 
     /**
      * @param result not null
      * @return the compile artifacts from the result
      * @see JavadocUtil#getCompileArtifacts(Set, boolean)
      */
     protected List getCompileArtifacts( ArtifactResolutionResult result )
     {
         return JavadocUtil.getCompileArtifacts( result.getArtifacts(), false );
     }
 
     // ----------------------------------------------------------------------
     // private methods
     // ----------------------------------------------------------------------
 
     /**
      * Method to get the excluded source files from the javadoc and create the argument string
      * that will be included in the javadoc commandline execution.
      *
      * @param sourcePaths the list of paths to the source files
      * @return a String that contains the exclude argument that will be used by javadoc
      */
     private String getExcludedPackages( List sourcePaths )
     {
         List excludedNames = null;
 
         if ( StringUtils.isNotEmpty( sourcepath ) && StringUtils.isNotEmpty( subpackages ) )
         {
             String[] excludedPackages = getExcludedPackages();
             String[] subpackagesList = subpackages.split( "[:]" );
 
             excludedNames = JavadocUtil.getExcludedNames( sourcePaths, subpackagesList, excludedPackages );
         }
 
         String excludeArg = "";
         if ( StringUtils.isNotEmpty( subpackages ) && excludedNames != null )
         {
             // add the excludedpackage names
             for ( Iterator it = excludedNames.iterator(); it.hasNext(); )
             {
                 String str = (String) it.next();
                 excludeArg = excludeArg + str;
 
                 if ( it.hasNext() )
                 {
                     excludeArg = excludeArg + ":";
                 }
             }
         }
 
         return excludeArg;
     }
 
     /**
      * Method to format the specified source paths that will be accepted by the javadoc tool.
      *
      * @param sourcePaths the list of paths to the source files that will be included in the javadoc
      * @return a String that contains the formatted source path argument
      */
     private String getSourcePath( List sourcePaths )
     {
         String sourcePath = null;
 
         if ( StringUtils.isEmpty( subpackages ) || StringUtils.isNotEmpty( sourcepath ) )
         {
             sourcePath = StringUtils.join( sourcePaths.iterator(), File.pathSeparator );
         }
 
         return sourcePath;
     }
 
     /**
      * Method to get the packages specified in the excludePackageNames parameter. The packages are split
      * with ',', ':', or ';' and then formatted.
      *
      * @return an array of String objects that contain the package names
      */
     private String[] getExcludedPackages()
     {
         String[] excludePackages = {};
 
         // for the specified excludePackageNames
         if ( excludePackageNames != null )
         {
             excludePackages = excludePackageNames.split( "[ ,:;]" );
         }
         for ( int i = 0; i < excludePackages.length; i++ )
         {
             excludePackages[i] = excludePackages[i].replace( '.', File.separatorChar );
         }
 
         return excludePackages;
     }
 
     /**
      * Method that sets the classpath elements that will be specified in the javadoc -classpath parameter.
      *
      * @return a String that contains the concatenated classpath elements
      * @throws MavenReportException if any
      */
     private String getClasspath()
         throws MavenReportException
     {
         List classpathElements = new ArrayList();
         Map compileArtifactMap = new HashMap();
 
         classpathElements.addAll( getProjectBuildOutputDirs( project ) );
 
         populateCompileArtifactMap( compileArtifactMap, getProjectArtifacts( project ) );
 
         if ( isAggregator() && project.isExecutionRoot() )
         {
             try
             {
                 for ( Iterator i = reactorProjects.iterator(); i.hasNext(); )
                 {
                     MavenProject subProject = (MavenProject) i.next();
 
                     if ( subProject != project )
                     {
                         classpathElements.addAll( getProjectBuildOutputDirs( subProject ) );
 
                         Set dependencyArtifacts = subProject.createArtifacts( factory, null, null );
                         if ( !dependencyArtifacts.isEmpty() )
                         {
                             ArtifactResolutionResult result = null;
                             try
                             {
                                 result =
                                     resolver.resolveTransitively( dependencyArtifacts, subProject.getArtifact(),
                                                                   subProject.getManagedVersionMap(),
                                                                   localRepository,
                                                                   subProject.getRemoteArtifactRepositories(),
                                                                   artifactMetadataSource );
                             }
                             catch ( MultipleArtifactsNotFoundException e )
                             {
                                 if ( checkMissingArtifactsInReactor( dependencyArtifacts, e.getMissingArtifacts() ) )
                                 {
                                     getLog().warn( "IGNORED to add some artifacts in the classpath. See above." );
                                 }
                                 else
                                 {
                                     // we can't find all the artifacts in the reactor so bubble the exception up.
                                     throw new MavenReportException( e.getMessage(), e );
                                 }
                             }
                             catch ( ArtifactNotFoundException e )
                             {
                                 throw new MavenReportException( e.getMessage(), e );
                             }
                             catch ( ArtifactResolutionException e )
                             {
                                 throw new MavenReportException( e.getMessage(), e );
                             }
 
                             if ( result == null )
                             {
                                 continue;
                             }
 
                             populateCompileArtifactMap( compileArtifactMap, getCompileArtifacts( result ) );
 
                             if ( getLog().isDebugEnabled() )
                             {
                                 StringBuffer sb = new StringBuffer();
 
                                 sb.append( "Compiled artifacts for " );
                                 sb.append( subProject.getGroupId() ).append( ":" );
                                 sb.append( subProject.getArtifactId() ).append( ":" );
                                 sb.append( subProject.getVersion() ).append( '\n' );
                                 for ( Iterator it = compileArtifactMap.keySet().iterator(); it.hasNext(); )
                                 {
                                     String key = it.next().toString();
 
                                     Artifact a = (Artifact) compileArtifactMap.get( key );
                                     sb.append( a.getFile() ).append( '\n' );
                                 }
 
                                 getLog().debug( sb.toString() );
                             }
                         }
                     }
                 }
             }
             catch ( InvalidDependencyVersionException e )
             {
                 throw new MavenReportException( e.getMessage(), e );
             }
         }
 
         for ( Iterator it = compileArtifactMap.keySet().iterator(); it.hasNext(); )
         {
             String key = it.next().toString();
 
             Artifact a = (Artifact) compileArtifactMap.get( key );
             classpathElements.add( a.getFile() );
         }
 
         return StringUtils.join( classpathElements.iterator(), File.pathSeparator );
     }
 
     /**
      * TODO remove the part with ToolchainManager lookup once we depend on
      * 3.0.9 (have it as prerequisite). Define as regular component field then.
      *
      * @return Toolchain instance
      */
     private Toolchain getToolchain()
     {
         Toolchain tc = null;
         try
         {
             if ( session != null ) // session is null in tests..
             {
                 ToolchainManager toolchainManager =
                     (ToolchainManager) session.getContainer().lookup( ToolchainManager.ROLE );
                 if ( toolchainManager != null )
                 {
                     tc = toolchainManager.getToolchainFromBuildContext( "jdk", session );
                 }
             }
         }
         catch ( ComponentLookupException componentLookupException )
         {
             // just ignore, could happen in pre-3.0.9 builds..
         }
 
         return tc;
     }
 
     /**
      * Method to put the artifacts in the hashmap.
      *
      * @param compileArtifactMap the hashmap that will contain the artifacts
      * @param artifactList the list of artifacts that will be put in the map
      * @throws MavenReportException if any
      */
     private void populateCompileArtifactMap( Map compileArtifactMap, Collection artifactList )
         throws MavenReportException
     {
         if ( artifactList != null )
         {
             for ( Iterator i = artifactList.iterator(); i.hasNext(); )
             {
                 Artifact newArtifact = (Artifact) i.next();
 
                 File file = newArtifact.getFile();
 
                 if ( file == null )
                 {
                     throw new MavenReportException( "Error in plugin descriptor - "
                         + "dependency was not resolved for artifact: " + newArtifact.getGroupId() + ":"
                         + newArtifact.getArtifactId() + ":" + newArtifact.getVersion() );
                 }
 
                 if ( compileArtifactMap.get( newArtifact.getDependencyConflictId() ) != null )
                 {
                     Artifact oldArtifact =
                         (Artifact) compileArtifactMap.get( newArtifact.getDependencyConflictId() );
 
                     ArtifactVersion oldVersion = new DefaultArtifactVersion( oldArtifact.getVersion() );
                     ArtifactVersion newVersion = new DefaultArtifactVersion( newArtifact.getVersion() );
                     if ( newVersion.compareTo( oldVersion ) > 0 )
                     {
                         compileArtifactMap.put( newArtifact.getDependencyConflictId(), newArtifact );
                     }
                 }
                 else
                 {
                     compileArtifactMap.put( newArtifact.getDependencyConflictId(), newArtifact );
                 }
             }
         }
     }
 
     /**
      * Method that sets the bottom text that will be displayed on the bottom of the
      * javadocs.
      *
      * @return a String that contains the text that will be displayed at the bottom of the javadoc
      */
     private String getBottomText()
     {
         int actualYear = Calendar.getInstance().get( Calendar.YEAR );
         String year = String.valueOf( actualYear );
 
         String inceptionYear = project.getInceptionYear();
 
         String theBottom = StringUtils.replace( this.bottom, "{currentYear}", year );
 
         if ( inceptionYear != null )
         {
             if ( inceptionYear.equals( year ) )
             {
                 theBottom = StringUtils.replace( theBottom, "{inceptionYear}-", "" );
             }
             else
             {
                 theBottom = StringUtils.replace( theBottom, "{inceptionYear}", inceptionYear );
             }
         }
         else
         {
             theBottom = StringUtils.replace( theBottom, "{inceptionYear}-", "" );
         }
 
         if ( project.getOrganization() == null )
         {
             theBottom = StringUtils.replace( theBottom, " {organizationName}", "" );
         }
         else
         {
             if ( StringUtils.isNotEmpty( project.getOrganization().getName() ) )
             {
                 if ( StringUtils.isNotEmpty( project.getOrganization().getUrl() ) )
                 {
                     theBottom =
                         StringUtils.replace( theBottom, "{organizationName}", "<a href=\""
                             + project.getOrganization().getUrl() + "\">" + project.getOrganization().getName()
                             + "</a>" );
                 }
                 else
                 {
                     theBottom =
                         StringUtils.replace( theBottom, "{organizationName}", project.getOrganization().getName() );
                 }
             }
             else
             {
                 theBottom = StringUtils.replace( theBottom, " {organizationName}", "" );
             }
         }
 
         return theBottom;
     }
 
     /**
      * Method to get the stylesheet path file to be used in the javadocs. If a custom stylesheet file is not specified,
      * either the stylesheet included in the plugin or the stylesheet file used by the javadoc tool will be used.
      *
      * @param javadocOutputDirectory the base directory of the plugin
      * @return a String that contains the path to the stylesheet file
      */
     private String getStylesheetFile( File javadocOutputDirectory )
     {
         String stylesheetfilePath = this.stylesheetfile;
         if ( StringUtils.isEmpty( stylesheetfilePath ) && "maven".equals( stylesheet ) )
         {
             stylesheetfilePath = javadocOutputDirectory + File.separator + DEFAULT_CSS_NAME;
         }
 
         return stylesheetfilePath;
     }
 
     /**
      * Method to get the access level for the classes and members to be shown in the generated javadoc.
      * If the specified access level is not public, protected, package or private, the access level
      * is set to protected.
      *
      * @return the access level
      */
     private String getAccessLevel()
     {
         String accessLevel;
         if ( "public".equalsIgnoreCase( show ) || "protected".equalsIgnoreCase( show )
             || "package".equalsIgnoreCase( show ) || "private".equalsIgnoreCase( show ) )
         {
             accessLevel = "-" + show;
         }
         else
         {
             if ( getLog().isErrorEnabled() )
             {
                 getLog().error( "Unrecognized access level to show '" + show + "'. Defaulting to protected." );
             }
             accessLevel = "-protected";
         }
 
         return accessLevel;
     }
 
     /**
      * Method to get the path of the bootclass artifacts used in the -bootclasspath option.
      *
      * @return the path to jar file that contains taglet class file separated with a colon (<code>:</code>)
      * on Solaris and a semi-colon (<code>;</code>) on Windows
      * @throws MavenReportException if any
      */
     private String getBootclassPath()
         throws MavenReportException
     {
         StringBuffer path = new StringBuffer();
 
         if ( bootclasspathArtifacts != null )
         {
             List bootclassPath = new ArrayList();
             for ( int i = 0; i < bootclasspathArtifacts.length; i++ )
             {
                 BootclasspathArtifact aBootclasspathArtifact = bootclasspathArtifacts[i];
 
                 if ( ( StringUtils.isNotEmpty( aBootclasspathArtifact.getGroupId() ) )
                     && ( StringUtils.isNotEmpty( aBootclasspathArtifact.getArtifactId() ) )
                     && ( StringUtils.isNotEmpty( aBootclasspathArtifact.getVersion() ) ) )
                 {
                     bootclassPath.addAll( getArtifactsAbsolutePath( aBootclasspathArtifact ) );
                 }
             }
 
             bootclassPath = JavadocUtil.pruneFiles( bootclassPath );
 
             path.append( StringUtils.join( bootclassPath.iterator(), File.pathSeparator ) );
         }
 
         if ( StringUtils.isNotEmpty( bootclasspath ) )
         {
             path.append( bootclasspath );
         }
 
         return path.toString();
     }
 
     /**
      * Method to get the path of the doclet artifacts used in the -docletpath option.
      *
      * Either docletArtifact or doclectArtifacts can be defined and used, not both, docletArtifact
      * takes precedence over doclectArtifacts. docletPath is always appended to any result path
      * definition.
      *
      * @return the path to jar file that contains doclet class file separated with a colon (<code>:</code>)
      * on Solaris and a semi-colon (<code>;</code>) on Windows
      * @throws MavenReportException if any
      */
     private String getDocletPath()
         throws MavenReportException
     {
         StringBuffer path = new StringBuffer();
         if ( !isDocletArtifactEmpty( docletArtifact ) )
         {
             path.append( StringUtils.join( getArtifactsAbsolutePath( docletArtifact ).iterator(),
                                            File.pathSeparator ) );
         }
         else if ( docletArtifacts != null )
         {
             for ( int i = 0; i < docletArtifacts.length; i++ )
             {
                 if ( !isDocletArtifactEmpty( docletArtifacts[i] ) )
                 {
                     path.append( StringUtils.join( getArtifactsAbsolutePath( docletArtifacts[i] ).iterator(),
                                                    File.pathSeparator ) );
 
                     if ( i < docletArtifacts.length - 1 )
                     {
                         path.append( File.pathSeparator );
                     }
                 }
             }
         }
 
         if ( !StringUtils.isEmpty( docletPath ) )
         {
             path.append( docletPath );
         }
 
         if ( StringUtils.isEmpty( path.toString() ) && getLog().isWarnEnabled() )
         {
             getLog().warn(
                            "No docletpath option was found. Please review <docletpath/> or <docletArtifact/>"
                                + " or <doclets/>." );
         }
 
         return path.toString();
     }
 
     /**
      * Verify if a doclet artifact is empty or not
      *
      * @param aDocletArtifact could be null
      * @return <code>true</code> if aDocletArtifact or the groupId/artifactId/version of the doclet artifact is null,
      * <code>false</code> otherwise.
      */
     private boolean isDocletArtifactEmpty( DocletArtifact aDocletArtifact )
     {
         if ( aDocletArtifact == null )
         {
             return true;
         }
 
         return StringUtils.isEmpty( aDocletArtifact.getGroupId() )
             && StringUtils.isEmpty( aDocletArtifact.getArtifactId() )
             && StringUtils.isEmpty( aDocletArtifact.getVersion() );
     }
 
     /**
      * Method to get the path of the taglet artifacts used in the -tagletpath option.
      *
      * @return the path to jar file that contains taglet class file separated with a colon (<code>:</code>)
      * on Solaris and a semi-colon (<code>;</code>) on Windows
      * @throws MavenReportException if any
      */
     private String getTagletPath()
         throws MavenReportException
     {
         StringBuffer path = new StringBuffer();
 
         if ( ( tagletArtifact != null ) && ( StringUtils.isNotEmpty( tagletArtifact.getGroupId() ) )
             && ( StringUtils.isNotEmpty( tagletArtifact.getArtifactId() ) )
             && ( StringUtils.isNotEmpty( tagletArtifact.getVersion() ) ) )
         {
             path.append( StringUtils.join( getArtifactsAbsolutePath( tagletArtifact ).iterator(),
                                            File.pathSeparator ) );
         }
 
         if ( tagletArtifacts != null )
         {
             List tagletsPath = new ArrayList();
             for ( int i = 0; i < tagletArtifacts.length; i++ )
             {
                 TagletArtifact aTagletArtifact = tagletArtifacts[i];
 
                 if ( ( StringUtils.isNotEmpty( aTagletArtifact.getGroupId() ) )
                     && ( StringUtils.isNotEmpty( aTagletArtifact.getArtifactId() ) )
                     && ( StringUtils.isNotEmpty( aTagletArtifact.getVersion() ) ) )
                 {
                     tagletsPath.addAll( getArtifactsAbsolutePath( aTagletArtifact ) );
                 }
             }
 
             tagletsPath = JavadocUtil.pruneFiles( tagletsPath );
 
             path.append( StringUtils.join( tagletsPath.iterator(), File.pathSeparator ) );
         }
 
         if ( taglets != null )
         {
             List tagletsPath = new ArrayList();
             for ( int i = 0; i < taglets.length; i++ )
             {
                 Taglet current = taglets[i];
 
                 if ( current == null )
                 {
                     continue;
                 }
 
                 if ( ( current.getTagletArtifact() != null )
                     && ( StringUtils.isNotEmpty( current.getTagletArtifact().getGroupId() ) )
                     && ( StringUtils.isNotEmpty( current.getTagletArtifact().getArtifactId() ) )
                     && ( StringUtils.isNotEmpty( current.getTagletArtifact().getVersion() ) ) )
                 {
                     tagletsPath.addAll( getArtifactsAbsolutePath( current.getTagletArtifact() ) );
                 }
                 else if ( StringUtils.isNotEmpty( current.getTagletpath() ) )
                 {
                     tagletsPath.add( current.getTagletpath() );
                 }
             }
 
             tagletsPath = JavadocUtil.pruneFiles( tagletsPath );
 
             path.append( StringUtils.join( tagletsPath.iterator(), File.pathSeparator ) );
         }
 
         if ( StringUtils.isNotEmpty( tagletpath ) )
         {
             path.append( tagletpath );
         }
 
         return path.toString();
     }
 
     /**
      * Return the Javadoc artifact path and its transitive dependencies path from the local repository
      *
      * @param javadocArtifact not null
      * @return a list of locale artifacts absolute path
      * @throws MavenReportException if any
      */
     private List getArtifactsAbsolutePath( JavadocPathArtifact javadocArtifact )
         throws MavenReportException
     {
         if ( ( StringUtils.isEmpty( javadocArtifact.getGroupId() ) )
             && ( StringUtils.isEmpty( javadocArtifact.getArtifactId() ) )
             && ( StringUtils.isEmpty( javadocArtifact.getVersion() ) ) )
         {
             return Collections.EMPTY_LIST;
         }
 
         List path = new ArrayList();
 
         try
         {
             Artifact artifact = createAndResolveArtifact( javadocArtifact );
             path.add( artifact.getFile().getAbsolutePath() );
 
             // Find its transitive dependencies in the local repo
             MavenProject artifactProject =
                 mavenProjectBuilder.buildFromRepository( artifact, remoteRepositories, localRepository );
             Set dependencyArtifacts = artifactProject.createArtifacts( factory, null, null );
             if ( !dependencyArtifacts.isEmpty() )
             {
                 ArtifactResolutionResult result =
                     resolver.resolveTransitively( dependencyArtifacts, artifactProject.getArtifact(),
                                                   artifactProject.getRemoteArtifactRepositories(),
                                                   localRepository, artifactMetadataSource );
                 Set artifacts = result.getArtifacts();
 
                 Map compileArtifactMap = new HashMap();
                 populateCompileArtifactMap( compileArtifactMap, artifacts );
 
                 for ( Iterator it = compileArtifactMap.keySet().iterator(); it.hasNext(); )
                 {
                     String key = it.next().toString();
 
                     Artifact a = (Artifact) compileArtifactMap.get( key );
                     path.add( a.getFile().getAbsolutePath() );
                 }
             }
 
             return path;
         }
         catch ( ArtifactResolutionException e )
         {
             throw new MavenReportException( "Unable to resolve artifact:" + javadocArtifact, e );
         }
         catch ( ArtifactNotFoundException e )
         {
             throw new MavenReportException( "Unable to find artifact:" + javadocArtifact, e );
         }
         catch ( ProjectBuildingException e )
         {
             throw new MavenReportException( "Unable to build the Maven project for the artifact:"
                 + javadocArtifact, e );
         }
         catch ( InvalidDependencyVersionException e )
         {
             throw new MavenReportException( "Unable to resolve artifact:" + javadocArtifact, e );
         }
     }
 
     /**
      * creates an {@link Artifact} representing the configured {@link JavadocPathArtifact} and resolves it.
      *
      * @param javadocArtifact the {@link JavadocPathArtifact} to resolve
      * @return a resolved {@link Artifact}
      * @throws ArtifactResolutionException if the resolution of the artifact failed.
      * @throws ArtifactNotFoundException if the artifact hasn't been found.
      * @throws ProjectBuildingException if the artifact POM could not be build.
      */
     private Artifact createAndResolveArtifact( JavadocPathArtifact javadocArtifact )
         throws ArtifactResolutionException, ArtifactNotFoundException, ProjectBuildingException
     {
         Artifact artifact =
             factory.createProjectArtifact( javadocArtifact.getGroupId(), javadocArtifact.getArtifactId(),
                                            javadocArtifact.getVersion(), Artifact.SCOPE_COMPILE );
 
         if ( artifact.getFile() == null )
         {
             MavenProject pluginProject =
                 mavenProjectBuilder.buildFromRepository( artifact, remoteRepositories, localRepository );
             artifact = pluginProject.getArtifact();
 
             resolver.resolve( artifact, remoteRepositories, localRepository );
         }
 
         return artifact;
     }
 
     /**
      * Method that adds/sets the java memory parameters in the command line execution.
      *
      * @param cmd the command line execution object where the argument will be added
      * @param arg the argument parameter name
      * @param memory the JVM memory value to be set
      * @see JavadocUtil#parseJavadocMemory(String)
      */
     private void addMemoryArg( Commandline cmd, String arg, String memory )
     {
         if ( StringUtils.isNotEmpty( memory ) )
         {
             try
             {
                 cmd.createArg().setValue( "-J" + arg + JavadocUtil.parseJavadocMemory( memory ) );
             }
             catch ( IllegalArgumentException e )
             {
                 if ( getLog().isErrorEnabled() )
                 {
                     getLog().error( "Malformed memory pattern for '" + arg + memory + "'. Ignore this option." );
                 }
             }
         }
     }
 
     /**
      * Method that adds/sets the javadoc proxy parameters in the command line execution.
      *
      * @param cmd the command line execution object where the argument will be added
      */
     private void addProxyArg( Commandline cmd )
     {
         // backward compatible
         if ( StringUtils.isNotEmpty( proxyHost ) )
         {
             if ( getLog().isWarnEnabled() )
             {
                 getLog().warn(
                                "The Javadoc plugin parameter 'proxyHost' is deprecated since 2.4. "
                                    + "Please configure an active proxy in your settings.xml." );
             }
             cmd.createArg().setValue( "-J-DproxyHost=" + proxyHost );
 
             if ( proxyPort > 0 )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    "The Javadoc plugin parameter 'proxyPort' is deprecated since 2.4. "
                                        + "Please configure an active proxy in your settings.xml." );
                 }
                 cmd.createArg().setValue( "-J-DproxyPort=" + proxyPort );
             }
         }
 
         if ( settings == null )
         {
             return;
         }
 
         Proxy activeProxy = settings.getActiveProxy();
         if ( activeProxy != null )
         {
             String protocol =
                 StringUtils.isNotEmpty( activeProxy.getProtocol() ) ? activeProxy.getProtocol() + "." : "";
 
             if ( StringUtils.isNotEmpty( activeProxy.getHost() ) )
             {
                 cmd.createArg().setValue( "-J-D" + protocol + "proxySet=true" );
                 cmd.createArg().setValue( "-J-D" + protocol + "proxyHost=" + activeProxy.getHost() );
 
                 if ( activeProxy.getPort() > 0 )
                 {
                     cmd.createArg().setValue( "-J-D" + protocol + "proxyPort=" + activeProxy.getPort() );
                 }
 
                 if ( StringUtils.isNotEmpty( activeProxy.getNonProxyHosts() ) )
                 {
                     cmd.createArg().setValue(
                                               "-J-D" + protocol + "nonProxyHosts=\""
                                                   + activeProxy.getNonProxyHosts() + "\"" );
                 }
 
                 if ( StringUtils.isNotEmpty( activeProxy.getUsername() ) )
                 {
                     cmd.createArg().setValue( "-J-Dhttp.proxyUser=\"" + activeProxy.getUsername() + "\"" );
 
                     if ( StringUtils.isNotEmpty( activeProxy.getPassword() ) )
                     {
                         cmd.createArg().setValue( "-J-Dhttp.proxyPassword=\"" + activeProxy.getPassword() + "\"" );
                     }
                 }
             }
         }
     }
 
     /**
      * Get the path of the Javadoc tool executable depending the user entry or try to find it depending the OS
      * or the <code>java.home</code> system property or the <code>JAVA_HOME</code> environment variable.
      *
      * @return the path of the Javadoc tool
      * @throws IOException if not found
      */
     private String getJavadocExecutable()
         throws IOException
     {
         Toolchain tc = getToolchain();
 
         if ( tc != null )
         {
             getLog().info( "Toolchain in javadoc-plugin: " + tc );
             if ( javadocExecutable != null )
             {
                 getLog().warn(
                                "Toolchains are ignored, 'javadocExecutable' parameter is set to "
                                    + javadocExecutable );
             }
             else
             {
                 javadocExecutable = tc.findTool( "javadoc" );
             }
         }
 
         String javadocCommand = "javadoc" + ( SystemUtils.IS_OS_WINDOWS ? ".exe" : "" );
 
         File javadocExe;
 
         // ----------------------------------------------------------------------
         // The javadoc executable is defined by the user
         // ----------------------------------------------------------------------
         if ( StringUtils.isNotEmpty( javadocExecutable ) )
         {
             javadocExe = new File( javadocExecutable );
 
             if ( javadocExe.isDirectory() )
             {
                 javadocExe = new File( javadocExe, javadocCommand );
             }
 
             if ( SystemUtils.IS_OS_WINDOWS && javadocExe.getName().indexOf( '.' ) < 0 )
             {
                 javadocExe = new File( javadocExe.getPath() + ".exe" );
             }
 
             if ( !javadocExe.isFile() )
             {
                 throw new IOException( "The javadoc executable '" + javadocExe
                     + "' doesn't exist or is not a file. Verify the <javadocExecutable/> parameter." );
             }
 
             return javadocExe.getAbsolutePath();
         }
 
         // ----------------------------------------------------------------------
         // Try to find javadocExe from System.getProperty( "java.home" )
         // By default, System.getProperty( "java.home" ) = JRE_HOME and JRE_HOME
         // should be in the JDK_HOME
         // ----------------------------------------------------------------------
         // For IBM's JDK 1.2
         if ( SystemUtils.IS_OS_AIX )
         {
             javadocExe =
                 new File( SystemUtils.getJavaHome() + File.separator + ".." + File.separator + "sh",
                           javadocCommand );
         }
         else if ( SystemUtils.IS_OS_MAC_OSX )
         {
             javadocExe = new File( SystemUtils.getJavaHome() + File.separator + "bin", javadocCommand );
         }
         else
         {
             javadocExe =
                 new File( SystemUtils.getJavaHome() + File.separator + ".." + File.separator + "bin",
                           javadocCommand );
         }
 
         // ----------------------------------------------------------------------
         // Try to find javadocExe from JAVA_HOME environment variable
         // ----------------------------------------------------------------------
         if ( !javadocExe.exists() || !javadocExe.isFile() )
         {
             Properties env = CommandLineUtils.getSystemEnvVars();
             String javaHome = env.getProperty( "JAVA_HOME" );
             if ( StringUtils.isEmpty( javaHome ) )
             {
                 throw new IOException( "The environment variable JAVA_HOME is not correctly set." );
             }
             if ( ( !new File( javaHome ).exists() ) || ( !new File( javaHome ).isDirectory() ) )
             {
                 throw new IOException( "The environment variable JAVA_HOME=" + javaHome
                     + " doesn't exist or is not a valid directory." );
             }
 
             javadocExe = new File( env.getProperty( "JAVA_HOME" ) + File.separator + "bin", javadocCommand );
         }
 
         if ( !javadocExe.exists() || !javadocExe.isFile() )
         {
             throw new IOException( "The javadoc executable '" + javadocExe
                 + "' doesn't exist or is not a file. Verify the JAVA_HOME environment variable." );
         }
 
         return javadocExe.getAbsolutePath();
     }
 
     /**
      * Set a new value for <code>fJavadocVersion</code>
      *
      * @param jExecutable not null
      * @throws MavenReportException if not found
      * @see JavadocUtil#getJavadocVersion(File)
      */
     private void setFJavadocVersion( File jExecutable )
         throws MavenReportException
     {
         float jVersion;
         try
         {
             jVersion = JavadocUtil.getJavadocVersion( jExecutable );
         }
         catch ( IOException e )
         {
             if ( getLog().isWarnEnabled() )
             {
                 getLog().warn( "Unable to find the javadoc version: " + e.getMessage() );
                 getLog().warn( "Using the Java version instead of, i.e. " + SystemUtils.JAVA_VERSION_FLOAT );
             }
             jVersion = SystemUtils.JAVA_VERSION_FLOAT;
         }
         catch ( CommandLineException e )
         {
             if ( getLog().isWarnEnabled() )
             {
                 getLog().warn( "Unable to find the javadoc version: " + e.getMessage() );
                 getLog().warn( "Using the Java the version instead of, i.e. " + SystemUtils.JAVA_VERSION_FLOAT );
             }
             jVersion = SystemUtils.JAVA_VERSION_FLOAT;
         }
         catch ( IllegalArgumentException e )
         {
             if ( getLog().isWarnEnabled() )
             {
                 getLog().warn( "Unable to find the javadoc version: " + e.getMessage() );
                 getLog().warn( "Using the Java the version instead of, i.e. " + SystemUtils.JAVA_VERSION_FLOAT );
             }
             jVersion = SystemUtils.JAVA_VERSION_FLOAT;
         }
 
         if ( StringUtils.isNotEmpty( javadocVersion ) )
         {
             try
             {
                 fJavadocVersion = Float.parseFloat( javadocVersion );
             }
             catch ( NumberFormatException e )
             {
                 throw new MavenReportException( "Unable to parse javadoc version: " + e.getMessage(), e );
             }
 
             if ( fJavadocVersion != jVersion && getLog().isWarnEnabled() )
             {
                 getLog().warn( "Are you sure about the <javadocVersion/> parameter? It seems to be " + jVersion );
             }
         }
         else
         {
             fJavadocVersion = jVersion;
         }
     }
 
     /**
      * Is the Javadoc version at least the requested version.
      *
      * @param requiredVersion the required version, for example 1.5f
      * @return <code>true</code> if the javadoc version is equal or greater than the
      * required version
      */
     private boolean isJavaDocVersionAtLeast( float requiredVersion )
     {
         return fJavadocVersion >= requiredVersion;
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * conditionally based on the given flag.
      *
      * @param arguments a list of arguments, not null
      * @param b the flag which controls if the argument is added or not.
      * @param value the argument value to be added.
      */
     private void addArgIf( List arguments, boolean b, String value )
     {
         if ( b )
         {
             arguments.add( value );
         }
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * regarding the requested Java version.
      *
      * @param arguments a list of arguments, not null
      * @param b the flag which controls if the argument is added or not.
      * @param value the argument value to be added.
      * @param requiredJavaVersion the required Java version, for example 1.31f or 1.4f
      * @see #addArgIf(java.util.List,boolean,String)
      * @see #isJavaDocVersionAtLeast(float)
      */
     private void addArgIf( List arguments, boolean b, String value, float requiredJavaVersion )
     {
         if ( b )
         {
             if ( isJavaDocVersionAtLeast( requiredJavaVersion ) )
             {
                 addArgIf( arguments, b, value );
             }
             else
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    value + " option is not supported on Java version < " + requiredJavaVersion
                                        + ". Ignore this option." );
                 }
             }
         }
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * if the the value is not null or empty.
      * <p/>
      * Moreover, the value could be comma separated.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @see #addArgIfNotEmpty(java.util.List,String,String,boolean)
      */
     private void addArgIfNotEmpty( List arguments, String key, String value )
     {
         addArgIfNotEmpty( arguments, key, value, false );
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * if the the value is not null or empty.
      * <p/>
      * Moreover, the value could be comma separated.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @param repeatKey repeat or not the key in the command line
      * @param splitValue if <code>true</code> given value will be tokenized by comma
      * @param requiredJavaVersion the required Java version, for example 1.31f or 1.4f
      * @see #addArgIfNotEmpty(List, String, String, boolean, boolean)
      * @see #isJavaDocVersionAtLeast(float)
      */
     private void addArgIfNotEmpty( List arguments, String key, String value, boolean repeatKey,
                                    boolean splitValue, float requiredJavaVersion )
     {
         if ( StringUtils.isNotEmpty( value ) )
         {
             if ( isJavaDocVersionAtLeast( requiredJavaVersion ) )
             {
                 addArgIfNotEmpty( arguments, key, value, repeatKey, splitValue );
             }
             else
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    key + " option is not supported on Java version < " + requiredJavaVersion
                                        + ". Ignore this option." );
                 }
             }
         }
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * if the the value is not null or empty.
      * <p/>
      * Moreover, the value could be comma separated.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @param repeatKey repeat or not the key in the command line
      * @param splitValue if <code>true</code> given value will be tokenized by comma
      */
     private void addArgIfNotEmpty( List arguments, String key, String value, boolean repeatKey, boolean splitValue )
     {
         if ( StringUtils.isNotEmpty( value ) )
         {
             if ( StringUtils.isNotEmpty( key ) )
             {
                 arguments.add( key );
             }
 
             if ( splitValue )
             {
                 StringTokenizer token = new StringTokenizer( value, "," );
                 while ( token.hasMoreTokens() )
                 {
                     String current = token.nextToken().trim();
 
                     if ( StringUtils.isNotEmpty( current ) )
                     {
                         arguments.add( current );
 
                         if ( token.hasMoreTokens() && repeatKey )
                         {
                             arguments.add( key );
                         }
                     }
                 }
             }
             else
             {
                 arguments.add( value );
             }
         }
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * if the the value is not null or empty.
      * <p/>
      * Moreover, the value could be comma separated.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @param repeatKey repeat or not the key in the command line
      */
     private void addArgIfNotEmpty( List arguments, String key, String value, boolean repeatKey )
     {
         addArgIfNotEmpty( arguments, key, value, repeatKey, true );
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * regarding the requested Java version.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @param requiredJavaVersion the required Java version, for example 1.31f or 1.4f
      * @see #addArgIfNotEmpty(java.util.List, String, String, float, boolean)
      */
     private void addArgIfNotEmpty( List arguments, String key, String value, float requiredJavaVersion )
     {
         addArgIfNotEmpty( arguments, key, value, requiredJavaVersion, false );
     }
 
     /**
      * Convenience method to add an argument to the <code>command line</code>
      * regarding the requested Java version.
      *
      * @param arguments a list of arguments, not null
      * @param key the argument name.
      * @param value the argument value to be added.
      * @param requiredJavaVersion the required Java version, for example 1.31f or 1.4f
      * @param repeatKey repeat or not the key in the command line
      * @see #addArgIfNotEmpty(java.util.List,String,String)
      * @see #isJavaDocVersionAtLeast(float)
      */
     private void addArgIfNotEmpty( List arguments, String key, String value, float requiredJavaVersion,
                                    boolean repeatKey )
     {
         if ( StringUtils.isNotEmpty( value ) )
         {
             if ( isJavaDocVersionAtLeast( requiredJavaVersion ) )
             {
                 addArgIfNotEmpty( arguments, key, value, repeatKey );
             }
             else
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn( key + " option is not supported on Java version < " + requiredJavaVersion );
                 }
             }
         }
     }
 
     /**
      * Convenience method to process offlineLink values as individual -linkoffline javadoc options
      *
      * @param arguments a list of arguments, not null
      */
     private void addLinkofflineArguments( List arguments )
     {
         List offlineLinksList =
             ( offlineLinks != null ? new ArrayList( Arrays.asList( offlineLinks ) ) : new ArrayList() );
 
         if ( !isAggregator() && reactorProjects != null )
         {
             String javadocDirRelative = PathUtils.toRelative( project.getBasedir(), getOutputDirectory() );
 
             for ( Iterator it = reactorProjects.iterator(); it.hasNext(); )
             {
                 MavenProject p = (MavenProject) it.next();
 
                 // don't add projects that have not built yet.
                 if ( p.getId().equals( project.getId() ) )
                 {
                     break;
                 }
 
                 if ( p.getUrl() != null )
                 {
                     String url = p.getUrl() + "/apidocs";
                     File location = new File( p.getBasedir(), javadocDirRelative );
 
                     if ( location.exists() )
                     {
                         OfflineLink ol = new OfflineLink();
                         ol.setUrl( url );
                         ol.setLocation( location.getAbsolutePath() );
 
                         offlineLinksList.add( ol );
                     }
                 }
             }
         }
 
         if ( offlineLinksList != null )
         {
             for ( int i = 0; i < offlineLinksList.size(); i++ )
             {
                 OfflineLink offlineLink = (OfflineLink) offlineLinksList.get( i );
                 addArgIfNotEmpty( arguments, "-linkoffline", JavadocUtil.quotedPathArgument( offlineLink.getUrl() )
                     + " " + JavadocUtil.quotedPathArgument( offlineLink.getLocation() ), true );
             }
         }
     }
 
     /**
      * Convenience method to process link values as individual -link javadoc options.
      * If a <code>package-list</code> in a configured link is not available, remove the link.
      * <br/>
      * <b>Note</b>: if a link is not fetchable:
      * <ul>
      * <li>Javadoc 1.4 and less throw an exception</li>
      * <li>Javadoc 1.5 and more display a warning</li>
      * </ul>
      *
      * @param arguments a list of arguments, not null
      */
     private void addLinkArguments( List arguments )
     {
         if ( links != null )
         {
             for ( int i = 0; i < links.size(); i++ )
             {
                 String link = (String) links.get( i );
 
                 if ( StringUtils.isEmpty( link ) )
                 {
                     continue;
                 }
 
                 if ( link.endsWith( "/" ) )
                 {
                     link = link.substring( 0, link.length() - 1 );
                 }
 
                 try
                 {
                     URI linkUri;
                     if ( link.trim().toLowerCase( Locale.ENGLISH ).startsWith( "http" )
                         || link.trim().toLowerCase( Locale.ENGLISH ).startsWith( "https" )
                         || link.trim().toLowerCase( Locale.ENGLISH ).startsWith( "ftp" )
                         || link.trim().toLowerCase( Locale.ENGLISH ).startsWith( "file" ) )
                     {
                         linkUri = new URI( link + "/package-list" );
                     }
                     else
                     {
                         // links can be relative paths or files
                         linkUri = new File( getOutputDirectory(), link + "/package-list" ).toURI();
                     }
                     JavadocUtil.fetchURL( settings, linkUri.toURL() );
                     addArgIfNotEmpty( arguments, "-link", JavadocUtil.quotedPathArgument( link ), true );
                 }
                 catch ( URISyntaxException e )
                 {
                     if ( getLog().isErrorEnabled() )
                     {
                         getLog().error( "Malformed link: " + link + "/package-list. Ignored it." );
                     }
                 }
                 catch ( IOException e )
                 {
                     if ( getLog().isErrorEnabled() )
                     {
                         getLog().error( "Error fetching link: " + link + "/package-list. Ignored it." );
                     }
                 }
             }
         }
     }
 
     /**
      * Returns an input stream for reading the specified resource from the
      * current class loader.
      *
      * @param resource the resource
      * @return InputStream An input stream for reading the resource, or <tt>null</tt>
      * if the resource could not be found
      */
     private InputStream getStream( String resource )
     {
         return getClass().getClassLoader().getResourceAsStream( resource );
     }
 
     /**
      * Coppy all resources to the output directory
      *
      * @param javadocOutputDirectory not null
      * @throws MavenReportException if any
      * @see #copyDefaultStylesheet(File)
      * @see #copyJavadocResources(File)
      * @see #copyAdditionalJavadocResources(File)
      */
     private void copyAllResources( File javadocOutputDirectory )
         throws MavenReportException
     {
         // ----------------------------------------------------------------------
         // Copy default resources
         // ----------------------------------------------------------------------
 
         try
         {
             copyDefaultStylesheet( javadocOutputDirectory );
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Unable to copy default stylesheet: " + e.getMessage(), e );
         }
 
         // ----------------------------------------------------------------------
         // Copy javadoc resources
         // ----------------------------------------------------------------------
 
         if ( docfilessubdirs )
         {
             /*
              * Workaround since -docfilessubdirs doesn't seem to be used correctly by the javadoc tool
              * (see other note about -sourcepath). Take care of the -excludedocfilessubdir option.
              */
             try
             {
                 copyJavadocResources( javadocOutputDirectory );
             }
             catch ( IOException e )
             {
                 throw new MavenReportException( "Unable to copy javadoc resources: " + e.getMessage(), e );
             }
         }
 
         // ----------------------------------------------------------------------
         // Copy additional javadoc resources in artifacts
         // ----------------------------------------------------------------------
 
         copyAdditionalJavadocResources( javadocOutputDirectory );
     }
 
     /**
      * Method that copy the <code>DEFAULT_STYLESHEET_NAME</code> file from the current class
      * loader to the <code>outputDirectory</code>.
      *
      * @param anOutputDirectory the output directory
      * @throws java.io.IOException if any
      * @see #DEFAULT_CSS_NAME
      */
     private void copyDefaultStylesheet( File anOutputDirectory )
         throws IOException
     {
         if ( anOutputDirectory == null || !anOutputDirectory.exists() )
         {
             throw new IOException( "The outputDirectory " + anOutputDirectory + " doesn't exists." );
         }
 
         InputStream is = getStream( RESOURCE_CSS_DIR + "/" + DEFAULT_CSS_NAME );
 
         if ( is == null )
         {
             throw new IOException( "The resource " + DEFAULT_CSS_NAME + " doesn't exists." );
         }
 
         File outputFile = new File( anOutputDirectory, DEFAULT_CSS_NAME );
 
         if ( !outputFile.getParentFile().exists() )
         {
             outputFile.getParentFile().mkdirs();
         }
 
         FileOutputStream w = new FileOutputStream( outputFile );
 
         IOUtil.copy( is, w );
 
         IOUtil.close( is );
 
         IOUtil.close( w );
     }
 
     /**
      * Method that copy all <code>doc-files</code> directories from <code>javadocDirectory</code> of
      * the current projet or of the projects in the reactor to the <code>outputDirectory</code>.
      *
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.2.html#docfiles">Reference
      * Guide, Copies new "doc-files" directory for holding images and examples</a>
      * @see #docfilessubdirs
      *
      * @param anOutputDirectory the output directory
      * @throws java.io.IOException if any
      */
     private void copyJavadocResources( File anOutputDirectory )
         throws IOException
     {
         if ( anOutputDirectory == null || !anOutputDirectory.exists() )
         {
             throw new IOException( "The outputDirectory " + anOutputDirectory + " doesn't exists." );
         }
 
         if ( getJavadocDirectory() != null )
         {
             JavadocUtil.copyJavadocResources( anOutputDirectory, getJavadocDirectory(), excludedocfilessubdir );
         }
 
         if ( isAggregator() && project.isExecutionRoot() )
         {
             for ( Iterator i = reactorProjects.iterator(); i.hasNext(); )
             {
                 MavenProject subProject = (MavenProject) i.next();
 
                 if ( subProject != project )
                 {
                     String javadocDirRelative =
                         PathUtils.toRelative( project.getBasedir(), getJavadocDirectory().getAbsolutePath() );
                     File javadocDir = new File( subProject.getBasedir(), javadocDirRelative );
                     JavadocUtil.copyJavadocResources( anOutputDirectory, javadocDir, excludedocfilessubdir );
                 }
             }
         }
     }
 
     /**
      * Method that copy additional Javadoc resources from given artifacts.
      *
      * @see #resourcesArtifacts
      * @param anOutputDirectory the output directory
      * @throws MavenReportException if any
      */
     private void copyAdditionalJavadocResources( File anOutputDirectory )
         throws MavenReportException
     {
         if ( resourcesArtifacts != null && resourcesArtifacts.length > 0 )
         {
             UnArchiver unArchiver;
             try
             {
                 unArchiver = archiverManager.getUnArchiver( "jar" );
             }
             catch ( NoSuchArchiverException e )
             {
                 throw new MavenReportException( "Unable to extract resources artifact. "
                     + "No archiver for 'jar' available.", e );
             }
 
             for ( int i = 0; i < resourcesArtifacts.length; i++ )
             {
                 ResourcesArtifact item = resourcesArtifacts[i];
 
                 Artifact artifact;
                 try
                 {
                     artifact = createAndResolveArtifact( item );
                 }
                 catch ( ArtifactResolutionException e )
                 {
                     throw new MavenReportException( "Unable to resolve artifact:" + item, e );
                 }
                 catch ( ArtifactNotFoundException e )
                 {
                     throw new MavenReportException( "Unable to find artifact:" + item, e );
                 }
                 catch ( ProjectBuildingException e )
                 {
                     throw new MavenReportException( "Unable to build the Maven project for the artifact:" + item,
                                                     e );
                 }
 
                 unArchiver.setSourceFile( artifact.getFile() );
                 unArchiver.setDestDirectory( anOutputDirectory );
 
                 getLog().info( "Extracting contents of resources artifact: " + artifact.getArtifactId() );
                 try
                 {
                     unArchiver.extract();
                 }
                 catch ( ArchiverException e )
                 {
                     throw new MavenReportException( "Extraction of resources failed. Artifact that failed was: "
                         + artifact.getArtifactId(), e );
                 }
             }
         }
     }
 
     /**
      * @param sourcePaths could be null
      * @param files not null
      * @return the list of package names for files in the sourcePaths
      */
     private List getPackageNames( List sourcePaths, List files )
     {
         return getPackageNamesOrFilesWithUnnamedPackages( sourcePaths, files, true );
     }
 
     /**
      * @param sourcePaths could be null
      * @param files not null
      * @return a list files with unnamed package names for files in the sourecPaths
      */
     private List getFilesWithUnnamedPackages( List sourcePaths, List files )
     {
         return getPackageNamesOrFilesWithUnnamedPackages( sourcePaths, files, false );
     }
 
     /**
      * @param sourcePaths not null, containing absolute and relative paths
      * @param files not null, containing list of quoted files
      * @param onlyPackageName boolean for only package name
      * @return a list of package names or files with unnamed package names, depending the value of the unnamed flag
      * @see #getFiles(List)
      * @see #getSourcePaths()
      */
     private List getPackageNamesOrFilesWithUnnamedPackages( List sourcePaths, List files, boolean onlyPackageName )
     {
         List returnList = new ArrayList();
 
         if ( !StringUtils.isEmpty( sourcepath ) )
         {
             return returnList;
         }
 
         for ( Iterator it = files.iterator(); it.hasNext(); )
         {
             String currentFile = (String) it.next();
             currentFile = currentFile.replace( '\\', '/' );
 
             for ( Iterator it2 = sourcePaths.iterator(); it2.hasNext(); )
             {
                 String currentSourcePath = (String) it2.next();
                 currentSourcePath = currentSourcePath.replace( '\\', '/' );
 
                 if ( !currentSourcePath.endsWith( "/" ) )
                 {
                     currentSourcePath += "/";
                 }
 
                 if ( currentFile.indexOf( currentSourcePath ) != -1 )
                 {
                     String packagename = currentFile.substring( currentSourcePath.length() + 1 );
                     if ( onlyPackageName && packagename.lastIndexOf( "/" ) != -1 )
                     {
                         packagename = packagename.substring( 0, packagename.lastIndexOf( "/" ) );
                         packagename = packagename.replace( '/', '.' );
 
                         if ( !returnList.contains( packagename ) )
                         {
                             returnList.add( packagename );
                         }
                     }
                     if ( !onlyPackageName && packagename.lastIndexOf( "/" ) == -1 )
                     {
                         returnList.add( currentFile );
                     }
                 }
             }
         }
 
         return returnList;
     }
 
     /**
      * Generate an <code>options</code> file for all options and arguments and add the <code>@options</code> in the
      * command line.
      *
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#argumentfiles">
      * Reference Guide, Command line argument files</a>
      *
      * @param cmd not null
      * @param arguments not null
      * @param javadocOutputDirectory not null
      * @throws MavenReportException if any
      * @see #OPTIONS_FILE_NAME
      */
     private void addCommandLineOptions( Commandline cmd, List arguments, File javadocOutputDirectory )
         throws MavenReportException
     {
         File optionsFile = new File( javadocOutputDirectory, OPTIONS_FILE_NAME );
 
         StringBuffer options = new StringBuffer();
         options.append( StringUtils.join( arguments.toArray( new String[0] ), SystemUtils.LINE_SEPARATOR ) );
 
         try
         {
             FileUtils.fileWrite( optionsFile.getAbsolutePath(), options.toString() );
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Unable to write '" + optionsFile.getName()
                 + "' temporary file for command execution", e );
         }
 
         cmd.createArg().setValue( "@" + OPTIONS_FILE_NAME );
 
         if ( !debug )
         {
             optionsFile.deleteOnExit();
         }
     }
 
     /**
      * Generate a file called <code>argfile</code> (or <code>files</code>, depending the JDK) to hold files and add
      * the <code>@argfile</code> (or <code>@file</code>, depending the JDK) in the command line.
      *
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#argumentfiles">
      * Reference Guide, Command line argument files
      * </a>
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/javadoc/whatsnew-1.4.html#runningjavadoc">
      * What s New in Javadoc 1.4
      * </a>
      *
      * @param cmd not null
      * @param javadocOutputDirectory not null
      * @param files not null
      * @throws MavenReportException if any
      * @see #isJavaDocVersionAtLeast(float)
      * @see #ARGFILE_FILE_NAME
      * @see #FILES_FILE_NAME
      */
     private void addCommandLineArgFile( Commandline cmd, File javadocOutputDirectory, List files )
         throws MavenReportException
     {
         File argfileFile;
         if ( isJavaDocVersionAtLeast( SINCE_JAVADOC_1_4 ) )
         {
             argfileFile = new File( javadocOutputDirectory, ARGFILE_FILE_NAME );
         }
         else
         {
             argfileFile = new File( javadocOutputDirectory, FILES_FILE_NAME );
         }
 
         try
         {
             FileUtils.fileWrite( argfileFile.getAbsolutePath(), StringUtils.join( files.iterator(),
                                                                                   SystemUtils.LINE_SEPARATOR ) );
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Unable to write '" + argfileFile.getName()
                 + "' temporary file for command execution", e );
         }
 
         if ( isJavaDocVersionAtLeast( SINCE_JAVADOC_1_4 ) )
         {
             cmd.createArg().setValue( "@" + ARGFILE_FILE_NAME );
         }
         else
         {
             cmd.createArg().setValue( "@" + FILES_FILE_NAME );
         }
 
         if ( !debug )
         {
             argfileFile.deleteOnExit();
         }
     }
 
     /**
      * Generate a file called <code>packages</code> to hold all package names and add the <code>@packages</code> in
      * the command line.
      *
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#argumentfiles">
      * Reference Guide, Command line argument files</a>
      *
      * @param cmd not null
      * @param javadocOutputDirectory not null
      * @param packageNames not null
      * @throws MavenReportException if any
      * @see #PACKAGES_FILE_NAME
      */
     private void addCommandLinePackages( Commandline cmd, File javadocOutputDirectory, List packageNames )
         throws MavenReportException
     {
         File packagesFile = new File( javadocOutputDirectory, PACKAGES_FILE_NAME );
 
         try
         {
             FileUtils.fileWrite( packagesFile.getAbsolutePath(),
                                  StringUtils.join( packageNames.toArray( new String[0] ),
                                                    SystemUtils.LINE_SEPARATOR ) );
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Unable to write '" + packagesFile.getName()
                 + "' temporary file for command execution", e );
         }
 
         cmd.createArg().setValue( "@" + PACKAGES_FILE_NAME );
 
         if ( !debug )
         {
             packagesFile.deleteOnExit();
         }
     }
 
     /**
      * Checks for the validity of the Javadoc options used by the user.
      *
      * @throws MavenReportException if error
      */
     private void validateJavadocOptions()
         throws MavenReportException
     {
         // encoding
         if ( StringUtils.isNotEmpty( getEncoding() ) && !JavadocUtil.validateEncoding( getEncoding() ) )
         {
             throw new MavenReportException( "Encoding not supported: " + getEncoding() );
         }
     }
 
     /**
      * Checks for the validity of the Standard Doclet options.
      * <br/>
      * For example, throw an exception if &lt;nohelp/&gt; and &lt;helpfile/&gt; options are used together.
      *
      * @throws MavenReportException if error or conflict found
      */
     private void validateStandardDocletOptions()
         throws MavenReportException
     {
         // docencoding
         if ( StringUtils.isNotEmpty( getDocencoding() ) && !JavadocUtil.validateEncoding( getDocencoding() ) )
         {
             throw new MavenReportException( "Encoding not supported: " + getDocencoding() );
         }
 
         // helpfile
         if ( StringUtils.isNotEmpty( helpfile ) && nohelp )
         {
             throw new MavenReportException( "Option <nohelp/> conflicts with <helpfile/>" );
         }
         if ( ( StringUtils.isNotEmpty( helpfile ) ) && ( !new File( helpfile ).exists() ) )
         {
             throw new MavenReportException( "File not found: " + helpfile );
         }
 
         // overview
         if ( ( getOverview() != null ) && nooverview )
         {
             throw new MavenReportException( "Option <nooverview/> conflicts with <overview/>" );
         }
 
         // index
         if ( splitindex && noindex )
         {
             throw new MavenReportException( "Option <noindex/> conflicts with <splitindex/>" );
         }
     }
 
     /**
      * This method is checking to see if the artifacts that can't be resolved are all
      * part of this reactor. This is done to prevent a chicken or egg scenario with
      * fresh projects. See MJAVADOC-116 for more info.
      *
      * @param dependencyArtifacts the sibling projects in the reactor
      * @param missing the artifacts that can't be found
      * @return true if ALL missing artifacts are found in the reactor.
      * @see DefaultPluginManager#checkRequiredMavenVersion( plugin, localRepository, remoteRepositories )
      */
     private boolean checkMissingArtifactsInReactor( Collection dependencyArtifacts, Collection missing )
     {
         Set foundInReactor = new HashSet();
         Iterator iter = missing.iterator();
         while ( iter.hasNext() )
         {
             Artifact mArtifact = (Artifact) iter.next();
             Iterator pIter = reactorProjects.iterator();
             while ( pIter.hasNext() )
             {
                 MavenProject p = (MavenProject) pIter.next();
                 if ( p.getArtifactId().equals( mArtifact.getArtifactId() )
                     && p.getGroupId().equals( mArtifact.getGroupId() )
                     && p.getVersion().equals( mArtifact.getVersion() ) )
                 {
                     getLog().warn(
                                    "The dependency: ["
                                        + p.getId()
                                        + "] can't be resolved but has been found in the reactor (probably snapshots).\n"
                                        + "This dependency has been excluded from the Javadoc classpath. "
                                        + "You should rerun javadoc after executing mvn install." );
 
                     // found it, move on.
                     foundInReactor.add( p );
                     break;
                 }
             }
         }
 
         // if all of them have been found, we can continue.
         return foundInReactor.size() == missing.size();
     }
 
     /**
      * Add Standard Javadoc Options.
      * <br/>
      * The <a href="package-summary.html#Standard_Javadoc_Options">package documentation</a> details the
      * Standard Javadoc Options wrapped by this Plugin.
      *
      * @param arguments not null
      * @param sourcePaths not null
      * @throws MavenReportException if any
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#javadocoptions">
      * http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#javadocoptions</a>
      */
     private void addJavadocOptions( List arguments, List sourcePaths )
         throws MavenReportException
     {
         validateJavadocOptions();
 
         // see com.sun.tools.javadoc.Start#parseAndExecute(String argv[])
         addArgIfNotEmpty( arguments, "-locale", JavadocUtil.quotedArgument( this.locale ) );
 
         // all options in alphabetical order
 
         if ( old && isJavaDocVersionAtLeast( SINCE_JAVADOC_1_4 ) )
         {
             if ( getLog().isWarnEnabled() )
             {
                 getLog().warn( "Javadoc 1.4+ doesn't support the -1.1 switch anymore. Ignore this option." );
             }
         }
         else
         {
             addArgIf( arguments, old, "-1.1" );
         }
 
         addArgIfNotEmpty( arguments, "-bootclasspath", JavadocUtil.quotedPathArgument( getBootclassPath() ) );
 
         if ( isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) )
         {
             addArgIf( arguments, breakiterator, "-breakiterator", SINCE_JAVADOC_1_5 );
         }
 
         addArgIfNotEmpty( arguments, "-classpath", JavadocUtil.quotedPathArgument( getClasspath() ) );
 
         if ( StringUtils.isNotEmpty( doclet ) )
         {
             addArgIfNotEmpty( arguments, "-doclet", JavadocUtil.quotedArgument( doclet ) );
             addArgIfNotEmpty( arguments, "-docletpath", JavadocUtil.quotedPathArgument( getDocletPath() ) );
         }
 
         if ( StringUtils.isEmpty( encoding ) )
         {
             getLog().warn(
                            "Source files encoding has not been set, using platform encoding "
                                + ReaderFactory.FILE_ENCODING + ", i.e. build is platform dependent!" );
         }
         addArgIfNotEmpty( arguments, "-encoding", JavadocUtil.quotedArgument( getEncoding() ) );
 
         addArgIfNotEmpty( arguments, "-exclude", getExcludedPackages( sourcePaths ), SINCE_JAVADOC_1_4 );
 
         addArgIfNotEmpty( arguments, "-extdirs", JavadocUtil.quotedPathArgument( extdirs ) );
 
         if ( ( getOverview() != null ) && ( getOverview().exists() ) )
         {
             addArgIfNotEmpty( arguments, "-overview",
                               JavadocUtil.quotedPathArgument( getOverview().getAbsolutePath() ) );
         }
 
         arguments.add( getAccessLevel() );
 
         if ( isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) )
         {
             addArgIf( arguments, quiet, "-quiet", SINCE_JAVADOC_1_5 );
         }
 
         addArgIfNotEmpty( arguments, "-source", JavadocUtil.quotedArgument( source ), SINCE_JAVADOC_1_4 );
 
         if ( ( StringUtils.isEmpty( sourcepath ) ) && ( StringUtils.isNotEmpty( subpackages ) ) )
         {
             sourcepath = StringUtils.join( sourcePaths.iterator(), File.pathSeparator );
         }
         addArgIfNotEmpty( arguments, "-sourcepath", JavadocUtil.quotedPathArgument( getSourcePath( sourcePaths ) ) );
 
         if ( StringUtils.isNotEmpty( sourcepath ) && isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) )
         {
             addArgIfNotEmpty( arguments, "-subpackages", subpackages, SINCE_JAVADOC_1_5 );
         }
 
         addArgIf( arguments, verbose, "-verbose" );
 
         addArgIfNotEmpty( arguments, null, additionalparam );
     }
 
     /**
      * Add Standard Doclet Options.
      * <br/>
      * The <a href="package-summary.html#Standard_Doclet_Options">package documentation</a> details the
      * Standard Doclet Options wrapped by this Plugin.
      *
      * @param javadocOutputDirectory not null
      * @param arguments not null
      * @throws MavenReportException if any
      * @see <a href="http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#standard">
      * http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/javadoc.html#standard</a>
      */
     private void addStandardDocletOptions( File javadocOutputDirectory, List arguments )
         throws MavenReportException
     {
         validateStandardDocletOptions();
 
         // all options in alphabetical order
 
         addArgIf( arguments, author, "-author" );
 
         addArgIfNotEmpty( arguments, "-bottom", JavadocUtil.quotedArgument( getBottomText() ), false, false );
 
         if ( !isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) )
         {
             addArgIf( arguments, breakiterator, "-breakiterator", SINCE_JAVADOC_1_4 );
         }
 
         addArgIfNotEmpty( arguments, "-charset", JavadocUtil.quotedArgument( getCharset() ) );
 
         addArgIfNotEmpty( arguments, "-d", JavadocUtil.quotedPathArgument( javadocOutputDirectory.toString() ) );
 
         addArgIfNotEmpty( arguments, "-docencoding", JavadocUtil.quotedArgument( getDocencoding() ) );
 
         addArgIf( arguments, docfilessubdirs, "-docfilessubdirs", SINCE_JAVADOC_1_4 );
 
         addArgIfNotEmpty( arguments, "-doctitle", JavadocUtil.quotedArgument( getDoctitle() ), false, false );
 
         if ( docfilessubdirs )
         {
             addArgIfNotEmpty( arguments, "-excludedocfilessubdir",
                               JavadocUtil.quotedPathArgument( excludedocfilessubdir ), SINCE_JAVADOC_1_4 );
         }
 
         addArgIfNotEmpty( arguments, "-footer", JavadocUtil.quotedArgument( footer ), false, false );
 
         addGroups( arguments );
 
         addArgIfNotEmpty( arguments, "-header", JavadocUtil.quotedArgument( header ), false, false );
 
         addArgIfNotEmpty( arguments, "-helpfile", JavadocUtil.quotedPathArgument( helpfile ) );
 
         addArgIf( arguments, keywords, "-keywords", SINCE_JAVADOC_1_4_2 );
 
         if ( !isOffline )
         {
             addLinkArguments( arguments );
         }
 
         addLinkofflineArguments( arguments );
 
         addArgIf( arguments, linksource, "-linksource", SINCE_JAVADOC_1_4 );
 
         if ( sourcetab > 0 )
         {
             if ( fJavadocVersion == SINCE_JAVADOC_1_4_2 )
             {
                 addArgIfNotEmpty( arguments, "-linksourcetab", String.valueOf( sourcetab ) );
             }
             addArgIfNotEmpty( arguments, "-sourcetab", String.valueOf( sourcetab ), SINCE_JAVADOC_1_5 );
         }
 
         addArgIf( arguments, nocomment, "-nocomment", SINCE_JAVADOC_1_4 );
 
         addArgIf( arguments, nodeprecated, "-nodeprecated" );
 
         addArgIf( arguments, nodeprecatedlist, "-nodeprecatedlist" );
 
         addArgIf( arguments, nohelp, "-nohelp" );
 
         addArgIf( arguments, noindex, "-noindex" );
 
         addArgIf( arguments, nonavbar, "-nonavbar" );
 
         addArgIf( arguments, nooverview, "-nooverview" );
 
         addArgIfNotEmpty( arguments, "-noqualifier", JavadocUtil.quotedArgument( noqualifier ), SINCE_JAVADOC_1_4 );
 
         addArgIf( arguments, nosince, "-nosince" );
 
         addArgIf( arguments, notimestamp, "-notimestamp", SINCE_JAVADOC_1_5 );
 
         addArgIf( arguments, notree, "-notree" );
 
         addArgIfNotEmpty( arguments, "-packagesheader", JavadocUtil.quotedArgument( packagesheader ),
                           SINCE_JAVADOC_1_4_2 );
 
         if ( !isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) ) // Sun bug: 4714350
         {
             addArgIf( arguments, quiet, "-quiet", SINCE_JAVADOC_1_4 );
         }
 
         addArgIf( arguments, serialwarn, "-serialwarn" );
 
         addArgIf( arguments, splitindex, "-splitindex" );
 
         addArgIfNotEmpty( arguments, "-stylesheetfile",
                           JavadocUtil.quotedPathArgument( getStylesheetFile( javadocOutputDirectory ) ) );
 
         if ( StringUtils.isNotEmpty( sourcepath ) && !isJavaDocVersionAtLeast( SINCE_JAVADOC_1_5 ) )
         {
             addArgIfNotEmpty( arguments, "-subpackages", subpackages, SINCE_JAVADOC_1_4 );
         }
 
         addArgIfNotEmpty( arguments, "-taglet", JavadocUtil.quotedArgument( taglet ), SINCE_JAVADOC_1_4 );
         addTaglets( arguments );
         addTagletsFromTagletArtifacts( arguments );
         addArgIfNotEmpty( arguments, "-tagletpath", JavadocUtil.quotedPathArgument( getTagletPath() ),
                           SINCE_JAVADOC_1_4 );
 
         addTags( arguments );
 
         addArgIfNotEmpty( arguments, "-top", JavadocUtil.quotedArgument( top ), false, false, SINCE_JAVADOC_1_6 );
 
         addArgIf( arguments, use, "-use" );
 
         addArgIf( arguments, version, "-version" );
 
         addArgIfNotEmpty( arguments, "-windowtitle", JavadocUtil.quotedArgument( getWindowtitle() ), false, false );
     }
 
     /**
      * Add <code>groups</code> parameter to arguments.
      *
      * @param arguments not null
      */
     private void addGroups( List arguments )
     {
         if ( groups == null )
         {
             return;
 
         }
 
         for ( int i = 0; i < groups.length; i++ )
         {
             if ( groups[i] == null || StringUtils.isEmpty( groups[i].getTitle() )
                 || StringUtils.isEmpty( groups[i].getPackages() ) )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn( "A group option is empty. Ignore this option." );
                 }
             }
             else
             {
                 String groupTitle = StringUtils.replace( groups[i].getTitle(), ",", "&#44;" );
                 addArgIfNotEmpty( arguments, "-group", JavadocUtil.quotedArgument( groupTitle ) + " "
                     + JavadocUtil.quotedArgument( groups[i].getPackages() ), true );
             }
         }
     }
 
     /**
      * Add <code>tags</code> parameter to arguments.
      *
      * @param arguments not null
      */
     private void addTags( List arguments )
     {
         if ( tags == null )
         {
             return;
         }
 
         for ( int i = 0; i < tags.length; i++ )
         {
             if ( StringUtils.isEmpty( tags[i].getName() ) )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn( "A tag name is empty. Ignore this option." );
                 }
             }
             else
             {
                 String value = "\"" + tags[i].getName();
                 if ( StringUtils.isNotEmpty( tags[i].getPlacement() ) )
                 {
                     value += ":" + tags[i].getPlacement();
                     if ( StringUtils.isNotEmpty( tags[i].getHead() ) )
                     {
                         value += ":" + tags[i].getHead();
                     }
                 }
                 value += "\"";
                 addArgIfNotEmpty( arguments, "-tag", value, SINCE_JAVADOC_1_4 );
             }
         }
     }
 
     /**
      * Add <code>taglets</code> parameter to arguments.
      *
      * @param arguments not null
      */
     private void addTaglets( List arguments )
     {
         if ( taglets == null )
         {
             return;
         }
 
         for ( int i = 0; i < taglets.length; i++ )
         {
             if ( ( taglets[i] == null ) || ( StringUtils.isEmpty( taglets[i].getTagletClass() ) ) )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn( "A taglet option is empty. Ignore this option." );
                 }
             }
             else
             {
                 addArgIfNotEmpty( arguments, "-taglet", JavadocUtil.quotedArgument( taglets[i].getTagletClass() ),
                                   SINCE_JAVADOC_1_4 );
             }
         }
     }
 
     /**
      * Auto-detect taglets class name from <code>tagletArtifacts</code> and add them to arguments.
      *
      * @param arguments not null
      * @throws MavenReportException if any
      * @see JavadocUtil#getTagletClassNames(File)
      */
     private void addTagletsFromTagletArtifacts( List arguments )
         throws MavenReportException
     {
         if ( tagletArtifacts == null )
         {
             return;
         }
 
         List tagletsPath = new ArrayList();
         for ( int i = 0; i < tagletArtifacts.length; i++ )
         {
             TagletArtifact aTagletArtifact = tagletArtifacts[i];
 
             if ( ( StringUtils.isNotEmpty( aTagletArtifact.getGroupId() ) )
                 && ( StringUtils.isNotEmpty( aTagletArtifact.getArtifactId() ) )
                 && ( StringUtils.isNotEmpty( aTagletArtifact.getVersion() ) ) )
             {
                 Artifact artifact;
                 try
                 {
                     artifact = createAndResolveArtifact( aTagletArtifact );
                 }
                 catch ( ArtifactResolutionException e )
                 {
                     throw new MavenReportException( "Unable to resolve artifact:" + aTagletArtifact, e );
                 }
                 catch ( ArtifactNotFoundException e )
                 {
                     throw new MavenReportException( "Unable to find artifact:" + aTagletArtifact, e );
                 }
                 catch ( ProjectBuildingException e )
                 {
                     throw new MavenReportException( "Unable to build the Maven project for the artifact:"
                         + aTagletArtifact, e );
                 }
 
                 tagletsPath.add( artifact.getFile().getAbsolutePath() );
             }
         }
 
         tagletsPath = JavadocUtil.pruneFiles( tagletsPath );
 
         for ( Iterator it = tagletsPath.iterator(); it.hasNext(); )
         {
             String tagletJar = (String) it.next();
 
             if ( !tagletJar.toLowerCase( Locale.ENGLISH ).endsWith( ".jar" ) )
             {
                 continue;
             }
 
             List tagletClasses;
             try
             {
                 tagletClasses = JavadocUtil.getTagletClassNames( new File( tagletJar ) );
             }
             catch ( IOException e )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    "Unable to auto-detect Taglet class names from '" + tagletJar
                                        + "'. Try to specify them with <taglets/>." );
                 }
                 if ( getLog().isDebugEnabled() )
                 {
                     getLog().debug( "IOException: " + e.getMessage(), e );
                 }
                 continue;
             }
             catch ( ClassNotFoundException e )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    "Unable to auto-detect Taglet class names from '" + tagletJar
                                        + "'. Try to specify them with <taglets/>." );
                 }
                 if ( getLog().isDebugEnabled() )
                 {
                     getLog().debug( "ClassNotFoundException: " + e.getMessage(), e );
                 }
                 continue;
             }
             catch ( NoClassDefFoundError e )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn(
                                    "Unable to auto-detect Taglet class names from '" + tagletJar
                                        + "'. Try to specify them with <taglets/>." );
                 }
                 if ( getLog().isDebugEnabled() )
                 {
                     getLog().debug( "NoClassDefFoundError: " + e.getMessage(), e );
                 }
                 continue;
             }
 
             if ( tagletClasses != null && !tagletClasses.isEmpty() )
             {
                 for ( Iterator it2 = tagletClasses.iterator(); it2.hasNext(); )
                 {
                     String tagletClass = (String) it2.next();
 
                     addArgIfNotEmpty( arguments, "-taglet", JavadocUtil.quotedArgument( tagletClass ),
                                       SINCE_JAVADOC_1_4 );
                 }
             }
         }
     }
 
     /**
      * Execute the Javadoc command line
      *
      * @param cmd not null
      * @param javadocOutputDirectory not null
      * @throws MavenReportException if any errors occur
      */
     private void executeJavadocCommandLine( Commandline cmd, File javadocOutputDirectory )
         throws MavenReportException
     {
         if ( getLog().isDebugEnabled() )
         {
             // no quoted arguments
             getLog().debug( CommandLineUtils.toString( cmd.getCommandline() ).replaceAll( "'", "" ) );
         }
 
         if ( debug )
         {
             File commandLineFile =
                 new File( javadocOutputDirectory, DEBUG_JAVADOC_SCRIPT_NAME );
 
             try
             {
                 FileUtils.fileWrite( commandLineFile.getAbsolutePath(),
                                      CommandLineUtils.toString( cmd.getCommandline() ).replaceAll( "'", "" ) );
 
                 if ( !SystemUtils.IS_OS_WINDOWS )
                 {
                     Runtime.getRuntime().exec( new String[] { "chmod", "a+x", commandLineFile.getAbsolutePath() } );
                 }
             }
             catch ( IOException e )
             {
                 if ( getLog().isWarnEnabled() )
                 {
                     getLog().warn( "Unable to write '" + commandLineFile.getName() + "' debug script file", e );
                 }
             }
         }
 
         CommandLineUtils.StringStreamConsumer err = new CommandLineUtils.StringStreamConsumer();
         try
         {
             int exitCode = CommandLineUtils.executeCommandLine( cmd, new DefaultConsumer(), err );
 
             if ( exitCode != 0 )
             {
                 String cmdLine = CommandLineUtils.toString( cmd.getCommandline() ).replaceAll( "'", "" );
                 cmdLine = JavadocUtil.hideProxyPassword( cmdLine, settings );
 
                 StringBuffer msg = new StringBuffer( "Exit code: " + exitCode + " - " + err.getOutput() );
                 msg.append( '\n' );
                 msg.append( "Command line was:" + cmdLine );
                 throw new MavenReportException( msg.toString() );
             }
         }
         catch ( CommandLineException e )
         {
             throw new MavenReportException( "Unable to execute javadoc command: " + e.getMessage(), e );
         }
 
         // ----------------------------------------------------------------------
         // Handle Javadoc warnings
         // ----------------------------------------------------------------------
 
         if ( StringUtils.isNotEmpty( err.getOutput() ) && getLog().isWarnEnabled() )
         {
             getLog().warn( "Javadoc Warnings" );
 
             StringTokenizer token = new StringTokenizer( err.getOutput(), "\n" );
             while ( token.hasMoreTokens() )
             {
                 String current = token.nextToken().trim();
 
                 getLog().warn( current );
             }
         }
     }
 }