package org.apache.maven.plugin.jxr;
   
   /*
    * 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.IOException;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  import javax.xml.parsers.DocumentBuilderFactory;
  import javax.xml.parsers.FactoryConfigurationError;
  import javax.xml.parsers.ParserConfigurationException;
  import javax.xml.transform.TransformerException;
  
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.ReportPlugin;
  import org.apache.maven.model.Site;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.wagon.repository.Repository;
  import org.apache.xpath.XPathAPI;
  import org.apache.xpath.objects.XObject;
  import org.codehaus.plexus.util.StringInputStream;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  import org.w3c.dom.Document;
  import org.xml.sax.SAXException;
  
  /**
   * Utility class for the jxr report.
   *
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   * @version $Id: JxrReportUtil.java 692686 2008-09-06 17:13:41Z hboutemy $
   */
  public class JxrReportUtil
  {
      /**
       * Return the <code>optionName</code> value defined in a project for the "maven-javadoc-plugin" plugin.
       *
       * @param project not null
       * @param optionName the option name wanted
       * @param defaultValue a default value
       * @return the value for the option name or the default value. Could be null if not found.
       * @throws IOException if any
       */
      protected static String getMavenJavadocPluginBasicOption( MavenProject project, String optionName,
                                                                String defaultValue )
          throws IOException
      {
          List plugins = new ArrayList();
          for ( Iterator it = project.getModel().getReporting().getPlugins().iterator(); it.hasNext(); )
          {
              plugins.add( it.next() );
          }
          for ( Iterator it = project.getModel().getBuild().getPlugins().iterator(); it.hasNext(); )
          {
              plugins.add( it.next() );
          }
  
          String pluginArtifactId = "maven-javadoc-plugin";
          for ( Iterator it = plugins.iterator(); it.hasNext(); )
          {
              Object next = it.next();
  
              Xpp3Dom pluginConf = null;
  
              if ( next instanceof Plugin )
              {
                  Plugin plugin = (Plugin) next;
  
                  // using out-of-box Maven plugins
                  if ( !( ( plugin.getGroupId().equals( "org.apache.maven.plugins" ) ) && ( plugin.getArtifactId()
                      .equals( pluginArtifactId ) ) ) )
                  {
                      continue;
                  }
  
                  pluginConf = (Xpp3Dom) plugin.getConfiguration();
              }
  
              if ( next instanceof ReportPlugin )
              {
                  ReportPlugin reportPlugin = (ReportPlugin) next;
 
                 // using out-of-box Maven plugins
                 if ( !( ( reportPlugin.getGroupId().equals( "org.apache.maven.plugins" ) ) && ( reportPlugin
                     .getArtifactId().equals( pluginArtifactId ) ) ) )
                 {
                     continue;
                 }
 
                 pluginConf = (Xpp3Dom) reportPlugin.getConfiguration();
             }
 
             if ( pluginConf == null )
             {
                 continue;
             }
 
             try
             {
                 Document doc = DocumentBuilderFactory.newInstance().newDocumentBuilder()
                     .parse( new StringInputStream( pluginConf.toString() ) );
 
                 XObject obj = XPathAPI.eval( doc, "//configuration/" + optionName );
 
                 if ( StringUtils.isNotEmpty( obj.toString() ) )
                 {
                     return obj.toString();
                 }
             }
             catch ( SAXException e )
             {
                 throw new IOException( "SAXException: " + e.getMessage() );
             }
             catch ( ParserConfigurationException e )
             {
                 throw new IOException( "ParserConfigurationException: " + e.getMessage() );
             }
             catch ( FactoryConfigurationError e )
             {
                 throw new IOException( "FactoryConfigurationError: " + e.getMessage() );
             }
             catch ( TransformerException e )
             {
                 throw new IOException( "TransformerException: " + e.getMessage() );
             }
         }
 
         return defaultValue;
     }
 
     /**
      * Generates the site structure using the project hierarchy (project and its modules) or using the
      * distributionManagement elements from the pom.xml.
      *
      * @todo come from site plugin!
      * @see org.apache.maven.plugins.site.SiteStageMojo#getStructure( MavenProject project, boolean ignoreMissingSiteUrl )
      *
      * @param project
      * @param ignoreMissingSiteUrl
      * @return the structure relative path
      * @throws IOException if any
      */
     protected static String getStructure( MavenProject project, boolean ignoreMissingSiteUrl )
         throws IOException
     {
         if ( project.getDistributionManagement() == null )
         {
             String hierarchy = project.getName();
 
             MavenProject parent = project.getParent();
             while ( parent != null )
             {
                 hierarchy = parent.getName() + "/" + hierarchy;
                 parent = parent.getParent();
             }
 
             return hierarchy;
         }
 
         Site site = project.getDistributionManagement().getSite();
         if ( site == null )
         {
             if ( !ignoreMissingSiteUrl )
             {
                 throw new IOException(
                                        "Missing site information in the distribution management element in the project: '"
                                            + project.getName() + "'." );
             }
 
             return null;
         }
 
         if ( StringUtils.isEmpty( site.getUrl() ) )
         {
             if ( !ignoreMissingSiteUrl )
             {
                 throw new IOException( "The URL in the site is missing in the project descriptor." );
             }
 
             return null;
         }
 
         Repository repository = new Repository( site.getId(), site.getUrl() );
         if ( StringUtils.isEmpty( repository.getBasedir() ) )
         {
             return repository.getHost();
         }
 
         if ( repository.getBasedir().startsWith( "/" ) )
         {
             return repository.getHost() + repository.getBasedir();
         }
 
         return repository.getHost() + "/" + repository.getBasedir();
     }
 }