package org.apache.maven.plugins.pmd;
   
   /*
    * 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.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Locale;
  import java.util.ResourceBundle;
  
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.plugins.annotations.Component;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.apache.maven.plugins.pmd.exec.PmdExecutor;
  import org.apache.maven.plugins.pmd.exec.PmdRequest;
  import org.apache.maven.plugins.pmd.exec.PmdResult;
  import org.apache.maven.project.DefaultProjectBuildingRequest;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.reporting.MavenReportException;
  import org.apache.maven.shared.artifact.filter.resolve.AndFilter;
  import org.apache.maven.shared.artifact.filter.resolve.ExclusionsFilter;
  import org.apache.maven.shared.artifact.filter.resolve.ScopeFilter;
  import org.apache.maven.shared.artifact.filter.resolve.TransformableFilter;
  import org.apache.maven.shared.transfer.artifact.resolve.ArtifactResult;
  import org.apache.maven.shared.transfer.dependencies.resolve.DependencyResolver;
  import org.apache.maven.shared.utils.logging.MessageUtils;
  import org.apache.maven.toolchain.Toolchain;
  import org.codehaus.plexus.resource.ResourceManager;
  import org.codehaus.plexus.resource.loader.FileResourceCreationException;
  import org.codehaus.plexus.resource.loader.FileResourceLoader;
  import org.codehaus.plexus.resource.loader.ResourceNotFoundException;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.StringUtils;
  
  import net.sourceforge.pmd.renderers.Renderer;
  
  /**
   * Creates a PMD site report based on the rulesets and configuration set in the plugin.
   * It can also generate a pmd output file aside from the site report in any of the following formats: xml, csv or txt.
   *
   * @author Brett Porter
   * @version $Id$
   * @since 2.0
   */
  @Mojo( name = "pmd", threadSafe = true, requiresDependencyResolution = ResolutionScope.TEST )
  public class PmdReport
      extends AbstractPmdReport
  {
      /**
       * The target JDK to analyze based on. Should match the source used in the compiler plugin. Valid values
       * with the default PMD version are
       * currently <code>1.3</code>, <code>1.4</code>, <code>1.5</code>, <code>1.6</code>, <code>1.7</code>,
       * <code>1.8</code>, <code>9</code>, <code>10</code>, <code>11</code>, <code>12</code>, <code>13</code>,
       * <code>14</code>, <code>15</code>, <code>16</code>, <code>17</code>, and <code>18</code>.
       *
       * <p> You can override the default PMD version by specifying PMD as a dependency,
       * see <a href="examples/upgrading-PMD-at-runtime.html">Upgrading PMD at Runtime</a>.</p>
       *
       * <p>
       *   <b>Note:</b> this parameter is only used if the language parameter is set to <code>java</code>.
       * </p>
       */
      @Parameter( property = "targetJdk", defaultValue = "${maven.compiler.source}" )
      private String targetJdk;
  
      /**
       * The programming language to be analyzed by PMD. Valid values are currently <code>java</code>,
       * <code>javascript</code> and <code>jsp</code>.
       *
       * @since 3.0
       */
      @Parameter( defaultValue = "java" )
      private String language;
  
      /**
       * The rule priority threshold; rules with lower priority than this will not be evaluated.
       *
      * @since 2.1
      */
     @Parameter( property = "minimumPriority", defaultValue = "5" )
     private int minimumPriority = 5;
 
     /**
      * Skip the PMD report generation. Most useful on the command line via "-Dpmd.skip=true".
      *
      * @since 2.1
      */
     @Parameter( property = "pmd.skip", defaultValue = "false" )
     private boolean skip;
 
     /**
      * The PMD rulesets to use. See the
      * <a href="https://pmd.github.io/latest/pmd_rules_java.html">Stock Java Rulesets</a> for a
      * list of available rules.
      * Defaults to a custom ruleset provided by this maven plugin
      * (<code>/rulesets/java/maven-pmd-plugin-default.xml</code>).
      */
     @Parameter
     String[] rulesets = new String[] { "/rulesets/java/maven-pmd-plugin-default.xml" };
 
     /**
      * Controls whether the project's compile/test classpath should be passed to PMD to enable its type resolution
      * feature.
      *
      * @since 3.0
      */
     @Parameter( property = "pmd.typeResolution", defaultValue = "true" )
     private boolean typeResolution;
 
     /**
      * Controls whether PMD will track benchmark information.
      *
      * @since 3.1
      */
     @Parameter( property = "pmd.benchmark", defaultValue = "false" )
     private boolean benchmark;
 
     /**
      * Benchmark output filename.
      *
      * @since 3.1
      */
     @Parameter( property = "pmd.benchmarkOutputFilename",
                     defaultValue = "${project.build.directory}/pmd-benchmark.txt" )
     private String benchmarkOutputFilename;
 
     /**
      * Source level marker used to indicate whether a RuleViolation should be suppressed. If it is not set, PMD's
      * default will be used, which is <code>NOPMD</code>. See also <a
      * href="https://pmd.github.io/latest/pmd_userdocs_suppressing_warnings.html">PMD &#x2013; Suppressing warnings</a>.
      *
      * @since 3.4
      */
     @Parameter( property = "pmd.suppressMarker" )
     private String suppressMarker;
 
     /**
      * per default pmd executions error are ignored to not break the whole
      *
      * @since 3.1
      */
     @Parameter( property = "pmd.skipPmdError", defaultValue = "true" )
     private boolean skipPmdError;
 
     /**
      * Enables the analysis cache, which speeds up PMD. This
      * requires a cache file, that contains the results of the last
      * PMD run. Thus the cache is only effective, if this file is
      * not cleaned between runs.
      *
      * @since 3.8
      */
     @Parameter( property = "pmd.analysisCache", defaultValue = "false" )
     private boolean analysisCache;
 
     /**
      * The location of the analysis cache, if it is enabled.
      * This file contains the results of the last PMD run and must not be cleaned
      * between consecutive PMD runs. Otherwise the cache is not in use.
      * If the file doesn't exist, PMD executes as if there is no cache enabled and
      * all files are analyzed. Otherwise only changed files will be analyzed again.
      *
      * @since 3.8
      */
     @Parameter( property = "pmd.analysisCacheLocation", defaultValue = "${project.build.directory}/pmd/pmd.cache" )
     private String analysisCacheLocation;
 
     /**
      * Also render processing errors into the HTML report.
      * Processing errors are problems, that PMD encountered while executing the rules.
      * It can be parsing errors or exceptions during rule execution.
      * Processing errors indicate a bug in PMD and the information provided help in
      * reporting and fixing bugs in PMD.
      *
      * @since 3.9.0
      */
     @Parameter( property = "pmd.renderProcessingErrors", defaultValue = "true" )
     private boolean renderProcessingErrors = true;
 
     /**
      * Also render the rule priority into the HTML report.
      *
      * @since 3.10.0
      */
     @Parameter( property = "pmd.renderRuleViolationPriority", defaultValue = "true" )
     private boolean renderRuleViolationPriority = true;
 
     /**
      * Add a section in the HTML report, that groups the found violations by rule priority
      * in addition to grouping by file.
      *
      * @since 3.12.0
      */
     @Parameter( property = "pmd.renderViolationsByPriority", defaultValue = "true" )
     private boolean renderViolationsByPriority = true;
 
     /**
      * Add a section in the HTML report that lists the suppressed violations.
      *
      * @since 3.17.0
      */
     @Parameter( property = "pmd.renderSuppressedViolations", defaultValue = "true" )
     private boolean renderSuppressedViolations = true;
 
     /**
      * Before PMD is executed, the configured rulesets are resolved and copied into this directory.
      * <p>Note: Before 3.13.0, this was by default ${project.build.directory}.
      *
      * @since 3.13.0
      */
     @Parameter( property = "pmd.rulesetsTargetDirectory", defaultValue = "${project.build.directory}/pmd/rulesets" )
     private File rulesetsTargetDirectory;
 
     /**
      * Used to locate configured rulesets. The rulesets could be on the plugin
      * classpath or in the local project file system.
      */
     @Component
     private ResourceManager locator;
 
     @Component
     private DependencyResolver dependencyResolver;
 
     /**
      * Contains the result of the last PMD execution.
      * It might be <code>null</code> which means, that PMD
      * has not been executed yet.
      */
     private PmdResult pmdResult;
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getName( Locale locale )
     {
         return getBundle( locale ).getString( "report.pmd.name" );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getDescription( Locale locale )
     {
         return getBundle( locale ).getString( "report.pmd.description" );
     }
 
     /**
      * Configures the PMD rulesets to be used directly.
      * Note: Usually the rulesets are configured via the property.
      *
      * @param rulesets the PMD rulesets to be used.
      * @see #rulesets
      */
     public void setRulesets( String[] rulesets )
     {
         this.rulesets = Arrays.copyOf( rulesets, rulesets.length );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public void executeReport( Locale locale )
         throws MavenReportException
     {
         try
         {
             execute( locale );
         }
         finally
         {
             if ( getSink() != null )
             {
                 getSink().close();
             }
         }
     }
 
     private void execute( Locale locale )
         throws MavenReportException
     {
         if ( !skip && canGenerateReport() )
         {
             ClassLoader origLoader = Thread.currentThread().getContextClassLoader();
             try
             {
                 Thread.currentThread().setContextClassLoader( this.getClass().getClassLoader() );
 
                 generateMavenSiteReport( locale );
             }
             finally
             {
                 Thread.currentThread().setContextClassLoader( origLoader );
             }
         }
     }
 
     @Override
     public boolean canGenerateReport()
     {
         if ( skip )
         {
             getLog().info( "Skipping PMD execution" );
             return false;
         }
 
         boolean result = super.canGenerateReport();
         if ( result )
         {
             try
             {
                 executePmd();
                 if ( skipEmptyReport )
                 {
                     result = pmdResult.hasViolations();
                     if ( !result )
                     {
                         getLog().debug( "Skipping report since skipEmptyReport is true and "
                                             + "there are no PMD violations." );
                     }
                 }
             }
             catch ( MavenReportException e )
             {
                 throw new RuntimeException( e );
             }
         }
         return result;
     }
 
     private void executePmd()
         throws MavenReportException
     {
         if ( pmdResult != null )
         {
             // PMD has already been run
             getLog().debug( "PMD has already been run - skipping redundant execution." );
             return;
         }
 
         try
         {
             filesToProcess = getFilesToProcess();
 
             if ( filesToProcess.isEmpty() && !"java".equals( language ) )
             {
                 getLog().warn( "No files found to process. Did you add your additional source folders like javascript?"
                                    + " (see also build-helper-maven-plugin)" );
             }
         }
         catch ( IOException e )
         {
             throw new MavenReportException( "Can't get file list", e );
         }
 
 
         PmdRequest request = new PmdRequest();
         request.setLanguageAndVersion( language, targetJdk );
         request.setRulesets( resolveRulesets() );
         request.setAuxClasspath( typeResolution ? determineAuxClasspath() : null );
         request.setSourceEncoding( getSourceEncoding() );
         request.addFiles( filesToProcess.keySet() );
         request.setMinimumPriority( minimumPriority );
         request.setSuppressMarker( suppressMarker );
         request.setBenchmarkOutputLocation( benchmark ? benchmarkOutputFilename : null );
         request.setAnalysisCacheLocation( analysisCache ? analysisCacheLocation : null );
         request.setExcludeFromFailureFile( excludeFromFailureFile );
 
         request.setTargetDirectory( targetDirectory.getAbsolutePath() );
         request.setOutputEncoding( getOutputEncoding() );
         request.setFormat( format );
         request.setShowPmdLog( showPmdLog );
         request.setColorizedLog( MessageUtils.isColorEnabled() );
         request.setSkipPmdError( skipPmdError );
         request.setIncludeXmlInSite( includeXmlInSite );
         request.setReportOutputDirectory( getReportOutputDirectory().getAbsolutePath() );
         request.setLogLevel( determineCurrentRootLogLevel() );
 
         Toolchain tc = getToolchain();
         if ( tc != null )
         {
             getLog().info( "Toolchain in maven-pmd-plugin: " + tc );
             String javaExecutable = tc.findTool( "java" ); //NOI18N
             request.setJavaExecutable( javaExecutable );
         }
 
         getLog().info( "PMD version: " + AbstractPmdReport.getPmdVersion() );
         pmdResult = PmdExecutor.execute( request );
     }
 
     protected String getSourceEncoding()
     {
         String encoding = super.getSourceEncoding();
         if ( StringUtils.isEmpty( encoding ) )
         {
             encoding = ReaderFactory.FILE_ENCODING;
             if ( !filesToProcess.isEmpty() )
             {
                 getLog().warn( "File encoding has not been set, using platform encoding " + ReaderFactory.FILE_ENCODING
                                + ", i.e. build is platform dependent!" );
             }
         }
         return encoding;
     }
 
 
     /**
      * Resolves the configured rulesets and copies them as files into the {@link #rulesetsTargetDirectory}.
      *
      * @return comma separated list of absolute file paths of ruleset files
      * @throws MavenReportException if a ruleset could not be found
      */
     private List<String> resolveRulesets() throws MavenReportException
     {
         // configure ResourceManager - will search for urls (URLResourceLoader) and files in various directories:
         // in the directory of the current project's pom file - note: extensions might replace the pom file on the fly
         locator.addSearchPath( FileResourceLoader.ID, project.getFile().getParentFile().getAbsolutePath() );
         // in the current project's directory
         locator.addSearchPath( FileResourceLoader.ID, project.getBasedir().getAbsolutePath() );
         // in the base directory - that's the directory of the initial pom requested to build,
         // e.g. the root of a multi module build
         locator.addSearchPath( FileResourceLoader.ID, session.getRequest().getBaseDirectory() );
         locator.setOutputDirectory( rulesetsTargetDirectory );
 
         String[] sets = new String[rulesets.length];
         try
         {
             for ( int idx = 0; idx < rulesets.length; idx++ )
             {
                 String set = rulesets[idx];
                 getLog().debug( "Preparing ruleset: " + set );
                 String rulesetFilename = determineRulesetFilename( set );
                 File ruleset = locator.getResourceAsFile( rulesetFilename, getLocationTemp( set ) );
                 if ( null == ruleset )
                 {
                     throw new MavenReportException( "Could not resolve " + set );
                 }
                 sets[idx] = ruleset.getAbsolutePath();
             }
         }
         catch ( ResourceNotFoundException | FileResourceCreationException e )
         {
             throw new MavenReportException( e.getMessage(), e );
         }
         return Arrays.asList( sets );
     }
 
     private String determineRulesetFilename( String ruleset )
     {
         String result = ruleset.trim();
         String lowercase = result.toLowerCase( Locale.ROOT );
         if ( lowercase.startsWith( "http://" ) || lowercase.startsWith( "https://" ) || lowercase.endsWith( ".xml" ) )
         {
             return result;
         }
 
         // assume last part is a single rule, e.g. myruleset.xml/SingleRule
         if ( result.indexOf( '/' ) > -1 )
         {
             String rulesetFilename = result.substring( 0, result.lastIndexOf( '/' ) );
             if ( rulesetFilename.toLowerCase( Locale.ROOT ).endsWith( ".xml" ) )
             {
                 return rulesetFilename;
             }
         }
         // maybe a built-in ruleset name, e.g. java-design -> rulesets/java/design.xml
         int dashIndex = lowercase.indexOf( '-' );
         if ( dashIndex > -1 && lowercase.indexOf( '-', dashIndex + 1 ) == -1 )
         {
             String language = result.substring( 0, dashIndex );
             String rulesetName = result.substring( dashIndex + 1 );
             return "rulesets/" + language + "/" + rulesetName + ".xml";
         }
         // fallback - no change of the given ruleset specifier
         return result;
     }
 
     private void generateMavenSiteReport( Locale locale )
         throws MavenReportException
     {
         Sink sink = getSink();
         PmdReportGenerator doxiaRenderer = new PmdReportGenerator( getLog(), sink, getBundle( locale ),
                 isAggregator() );
         doxiaRenderer.setRenderRuleViolationPriority( renderRuleViolationPriority );
         doxiaRenderer.setRenderViolationsByPriority( renderViolationsByPriority );
         doxiaRenderer.setFiles( filesToProcess );
         doxiaRenderer.setViolations( pmdResult.getViolations() );
         if ( renderSuppressedViolations )
         {
             doxiaRenderer.setSuppressedViolations( pmdResult.getSuppressedViolations() );
         }
         if ( renderProcessingErrors )
         {
             doxiaRenderer.setProcessingErrors( pmdResult.getErrors() );
         }
 
         try
         {
             doxiaRenderer.beginDocument();
             doxiaRenderer.render();
             doxiaRenderer.endDocument();
         }
         catch ( IOException e )
         {
             getLog().warn( "Failure creating the report: " + e.getLocalizedMessage(), e );
         }
     }
 
     /**
      * Convenience method to get the location of the specified file name.
      *
      * @param name the name of the file whose location is to be resolved
      * @return a String that contains the absolute file name of the file
      */
     protected String getLocationTemp( String name )
     {
         String loc = name;
         if ( loc.indexOf( '/' ) != -1 )
         {
             loc = loc.substring( loc.lastIndexOf( '/' ) + 1 );
         }
         if ( loc.indexOf( '\\' ) != -1 )
         {
             loc = loc.substring( loc.lastIndexOf( '\\' ) + 1 );
         }
 
         // MPMD-127 in the case that the rules are defined externally on a url
         // we need to replace some special url characters that cannot be
         // used in filenames on disk or produce ackward filenames.
         // replace all occurrences of the following characters: ? : & = %
         loc = loc.replaceAll( "[\\?\\:\\&\\=\\%]", "_" );
 
         if ( !loc.endsWith( ".xml" ) )
         {
             loc = loc + ".xml";
         }
 
         getLog().debug( "Before: " + name + " After: " + loc );
         return loc;
     }
 
     private String determineAuxClasspath() throws MavenReportException
     {
         try
         {
             List<String> classpath = new ArrayList<>();
             if ( isAggregator() )
             {
                 List<String> dependencies = new ArrayList<>();
 
                 // collect exclusions for projects within the reactor
                 // if module a depends on module b and both are in the reactor
                 // then we don't want to resolve the dependency as an artifact.
                 List<String> exclusionPatterns = new ArrayList<>();
                 for ( MavenProject localProject : getAggregatedProjects() )
                 {
                     exclusionPatterns.add( localProject.getGroupId() + ":" + localProject.getArtifactId() );
                 }
                 TransformableFilter filter = new AndFilter( Arrays.asList(
                         new ExclusionsFilter( exclusionPatterns ),
                         includeTests ? ScopeFilter.including( "compile", "provided", "test" )
                                      : ScopeFilter.including( "compile", "provided" )
                 ) );
 
                 for ( MavenProject localProject : getAggregatedProjects() )
                 {
                     ProjectBuildingRequest buildingRequest = new DefaultProjectBuildingRequest(
                             session.getProjectBuildingRequest() );
 
                     Iterable<ArtifactResult> resolvedDependencies = dependencyResolver.resolveDependencies(
                             buildingRequest, localProject.getDependencies(), null, filter );
 
                     for ( ArtifactResult resolvedArtifact : resolvedDependencies )
                     {
                         dependencies.add( resolvedArtifact.getArtifact().getFile().toString() );
                     }
 
                     List<String> projectClasspath = includeTests ? localProject.getTestClasspathElements()
                             : localProject.getCompileClasspathElements();
 
                     // Add the project's target folder first
                     classpath.addAll( projectClasspath );
                     if ( !localProject.isExecutionRoot() )
                     {
                         for ( String path : projectClasspath )
                         {
                             File pathFile = new File( path );
                             String[] children = pathFile.list();
 
                             if ( !pathFile.exists() || ( children != null && children.length == 0 ) )
                             {
                                 getLog().warn( "The project " + localProject.getArtifactId()
                                     + " does not seem to be compiled. PMD results might be inaccurate." );
                             }
                         }
                     }
 
                 }
 
                 // Add the dependencies as last entries
                 classpath.addAll( dependencies );
 
                 getLog().debug( "Using aggregated aux classpath: " + classpath );
             }
             else
             {
                 classpath.addAll( includeTests ? project.getTestClasspathElements()
                                                : project.getCompileClasspathElements() );
 
                 getLog().debug( "Using aux classpath: " + classpath );
             }
             String path = StringUtils.join( classpath.iterator(), File.pathSeparator );
             return path;
         }
         catch ( Exception e )
         {
             throw new MavenReportException( e.getMessage(), e );
         }
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getOutputName()
     {
         return "pmd";
     }
 
     private static ResourceBundle getBundle( Locale locale )
     {
         return ResourceBundle.getBundle( "pmd-report", locale, PmdReport.class.getClassLoader() );
     }
 
     /**
      * Create and return the correct renderer for the output type.
      *
      * @return the renderer based on the configured output
      * @throws org.apache.maven.reporting.MavenReportException if no renderer found for the output type
      * @deprecated Use {@link PmdExecutor#createRenderer(String, String)} instead.
      */
     @Deprecated
     public final Renderer createRenderer() throws MavenReportException
     {
         return PmdExecutor.createRenderer( format, getOutputEncoding() );
     }
 }