package org.apache.maven.plugin.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.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStreamWriter;
  import java.io.PrintStream;
  import java.io.Writer;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Locale;
  import java.util.Properties;
  import java.util.ResourceBundle;
  
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.plugin.MojoExecutionException;
  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.reporting.MavenReportException;
  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.FileUtils;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.StringUtils;
  
  import net.sourceforge.pmd.PMD;
  import net.sourceforge.pmd.PMDConfiguration;
  import net.sourceforge.pmd.Report;
  import net.sourceforge.pmd.RuleContext;
  import net.sourceforge.pmd.RulePriority;
  import net.sourceforge.pmd.RuleSetFactory;
  import net.sourceforge.pmd.RuleSetReferenceId;
  import net.sourceforge.pmd.RuleViolation;
  import net.sourceforge.pmd.benchmark.Benchmarker;
  import net.sourceforge.pmd.benchmark.TextReport;
  import net.sourceforge.pmd.lang.LanguageRegistry;
  import net.sourceforge.pmd.lang.LanguageVersion;
  import net.sourceforge.pmd.renderers.CSVRenderer;
  import net.sourceforge.pmd.renderers.HTMLRenderer;
  import net.sourceforge.pmd.renderers.Renderer;
  import net.sourceforge.pmd.renderers.TextRenderer;
  import net.sourceforge.pmd.renderers.XMLRenderer;
  import net.sourceforge.pmd.util.datasource.DataSource;
  import net.sourceforge.pmd.util.datasource.FileDataSource;
  
  /**
   * Creates a PMD report.
   *
   * @author Brett Porter
   * @version $Id: PmdReport.html 999063 2016-10-08 16:53:12Z adangel $
   * @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 target used in the compiler plugin. Valid values are
       * currently <code>1.3</code>, <code>1.4</code>, <code>1.5</code>, <code>1.6</code>, <code>1.7</code> and
       * <code>1.8</code>.
       * <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.target}" )
      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="http://pmd.github.io/pmd-5.5.1/pmd-java/rules/index.html">Stock Java Rulesets</a> for a
      * list of some included. Defaults to the java-basic, java-empty, java-imports, java-unnecessary
      * and java-unusedcode rulesets.
      */
     @Parameter
     private String[] rulesets = new String[] { "java-basic", "java-empty", "java-imports",
             "java-unnecessary", "java-unusedcode" };
 
     /**
      * 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 = "false" )
     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/usage/suppressing.html">PMD &#x2013; Suppressing warnings</a>.
      *
      * @since 3.4
      */
     @Parameter( property = "pmd.suppressMarker" )
     private String suppressMarker;
 
     /**
      */
     @Component
     private ResourceManager locator;
 
     /** The PMD renderer for collecting violations. */
     private PmdCollectingRenderer renderer;
 
     /** Helper to exclude violations given as a properties file. */
     private final ExcludeViolationsFromFile excludeFromFile = new ExcludeViolationsFromFile();
 
     /**
      * per default pmd executions error are ignored to not break the whole
      *
      * @since 3.1
      */
     @Parameter( property = "pmd.skipPmdError", defaultValue = "true" )
     private boolean skipPmdError;
 
     /**
      * {@inheritDoc}
      */
     public String getName( Locale locale )
     {
         return getBundle( locale ).getString( "report.pmd.name" );
     }
 
     /**
      * {@inheritDoc}
      */
     public String getDescription( Locale locale )
     {
         return getBundle( locale ).getString( "report.pmd.description" );
     }
 
     public void setRulesets( String[] rules )
     {
         rulesets = rules;
     }
 
     /**
      * {@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() );
 
                 Report report = generateReport( locale );
 
                 if ( !isHtml() && !isXml() )
                 {
                     writeNonHtml( report );
                 }
             }
             finally
             {
                 Thread.currentThread().setContextClassLoader( origLoader );
             }
         }
     }
 
     @Override
     public boolean canGenerateReport()
     {
         if ( skip )
         {
             return false;
         }
 
         boolean result = super.canGenerateReport();
         if ( result )
         {
             try
             {
                 executePmdWithClassloader();
                 if ( skipEmptyReport )
                 {
                     result = renderer.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 executePmdWithClassloader()
         throws MavenReportException
     {
         ClassLoader origLoader = Thread.currentThread().getContextClassLoader();
         try
         {
             Thread.currentThread().setContextClassLoader( this.getClass().getClassLoader() );
             executePmd();
         }
         finally
         {
             Thread.currentThread().setContextClassLoader( origLoader );
         }
     }
 
     private void executePmd()
         throws MavenReportException
     {
         if ( renderer != null )
         {
             // PMD has already been run
             getLog().debug( "PMD has already been run - skipping redundant execution." );
             return;
         }
 
         try
         {
             excludeFromFile.loadExcludeFromFailuresData( excludeFromFailureFile );
         }
         catch ( MojoExecutionException e )
         {
             throw new MavenReportException( "Unable to load exclusions", e );
         }
 
         // configure ResourceManager
         locator.addSearchPath( FileResourceLoader.ID, project.getFile().getParentFile().getAbsolutePath() );
         locator.addSearchPath( "url", "" );
         locator.setOutputDirectory( targetDirectory );
 
         renderer = new PmdCollectingRenderer();
         PMDConfiguration pmdConfiguration = getPMDConfiguration();
 
         String[] sets = new String[rulesets.length];
         try
         {
             for ( int idx = 0; idx < rulesets.length; idx++ )
             {
                 String set = rulesets[idx];
                 getLog().debug( "Preparing ruleset: " + set );
                 RuleSetReferenceId id = new RuleSetReferenceId( set );
                 File ruleset = locator.getResourceAsFile( id.getRuleSetFileName(), getLocationTemp( set ) );
                 if ( null == ruleset )
                 {
                     throw new MavenReportException( "Could not resolve " + set );
                 }
                 sets[idx] = ruleset.getAbsolutePath();
             }
         }
         catch ( ResourceNotFoundException e )
         {
             throw new MavenReportException( e.getMessage(), e );
         }
         catch ( FileResourceCreationException e )
         {
             throw new MavenReportException( e.getMessage(), e );
         }
         pmdConfiguration.setRuleSets( StringUtils.join( sets, "," ) );
 
         try
         {
             if ( filesToProcess == null )
             {
                 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 );
         }
 
         String encoding = getSourceEncoding();
         if ( StringUtils.isEmpty( encoding ) && !filesToProcess.isEmpty() )
         {
             getLog().warn( "File encoding has not been set, using platform encoding " + ReaderFactory.FILE_ENCODING
                                + ", i.e. build is platform dependent!" );
             encoding = ReaderFactory.FILE_ENCODING;
         }
         pmdConfiguration.setSourceEncoding( encoding );
 
         List<DataSource> dataSources = new ArrayList<>( filesToProcess.size() );
         for ( File f : filesToProcess.keySet() )
         {
             dataSources.add( new FileDataSource( f ) );
         }
 
         if ( sets.length > 0 )
         {
             processFilesWithPMD( pmdConfiguration, dataSources );
         }
         else
         {
             getLog().debug( "Skipping PMD execution as no rulesets are defined." );
         }
 
         if ( renderer.hasErrors() )
         {
             if ( !skipPmdError )
             {
                 getLog().error( "PMD processing errors:" );
                 getLog().error( renderer.getErrorsAsString() );
                 throw new MavenReportException( "Found " + renderer.getErrors().size() + " PMD processing errors" );
             }
             getLog().warn( "There are " + renderer.getErrors().size() + " PMD processing errors:" );
             getLog().warn( renderer.getErrorsAsString() );
         }
 
         removeExcludedViolations( renderer.getViolations() );
 
         // if format is XML, we need to output it even if the file list is empty or we have no violations
         // so the "check" goals can check for violations
         if ( isXml() && renderer != null )
         {
             writeNonHtml( renderer.asReport() );
         }
 
         if ( benchmark )
         {
             try ( PrintStream benchmarkFileStream = new PrintStream( benchmarkOutputFilename ) )
             {
                 ( new TextReport() ).generate( Benchmarker.values(), benchmarkFileStream );
             }
             catch ( FileNotFoundException fnfe )
             {
                 getLog().error( "Unable to generate benchmark file: " + benchmarkOutputFilename, fnfe );
             }
         }
     }
 
     private void removeExcludedViolations( List<RuleViolation> violations )
     {
         getLog().debug( "Removing excluded violations. Using " + excludeFromFile.countExclusions()
             + " configured exclusions." );
         int violationsBefore = violations.size();
 
         Iterator<RuleViolation> iterator = violations.iterator();
         while ( iterator.hasNext() )
         {
             RuleViolation rv = iterator.next();
             if ( excludeFromFile.isExcludedFromFailure( rv ) )
             {
                 iterator.remove();
             }
         }
 
         int numberOfExcludedViolations = violationsBefore - violations.size();
         getLog().debug( "Excluded " + numberOfExcludedViolations + " violations." );
     }
 
     private void processFilesWithPMD( PMDConfiguration pmdConfiguration, List<DataSource> dataSources )
             throws MavenReportException
     {
         RuleSetFactory ruleSetFactory = new RuleSetFactory();
         ruleSetFactory.setMinimumPriority( RulePriority.valueOf( this.minimumPriority ) );
         RuleContext ruleContext = new RuleContext();
 
         try
         {
             getLog().debug( "Executing PMD..." );
             PMD.processFiles( pmdConfiguration, ruleSetFactory, dataSources, ruleContext,
                               Arrays.<Renderer>asList( renderer ) );
 
             if ( getLog().isDebugEnabled() )
             {
                 getLog().debug( "PMD finished. Found " + renderer.getViolations().size() + " violations." );
             }
         }
         catch ( Exception e )
         {
             String message = "Failure executing PMD: " + e.getLocalizedMessage();
             if ( !skipPmdError )
             {
                 throw new MavenReportException( message, e );
             }
             getLog().warn( message, e );
         }
     }
 
     private Report generateReport( Locale locale )
         throws MavenReportException
     {
         Sink sink = getSink();
         PmdReportGenerator doxiaRenderer = new PmdReportGenerator( getLog(), sink, getBundle( locale ), aggregate );
         doxiaRenderer.setFiles( filesToProcess );
         doxiaRenderer.setViolations( renderer.getViolations() );
 
         try
         {
             doxiaRenderer.beginDocument();
             doxiaRenderer.render();
             doxiaRenderer.endDocument();
         }
         catch ( IOException e )
         {
             getLog().warn( "Failure creating the report: " + e.getLocalizedMessage(), e );
         }
 
         return renderer.asReport();
     }
 
     /**
      * 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;
     }
 
     /**
      * Use the PMD renderers to render in any format aside from HTML.
      *
      * @param report
      * @throws MavenReportException
      */
     private void writeNonHtml( Report report )
         throws MavenReportException
     {
         Renderer r = createRenderer();
 
         if ( r == null )
         {
             return;
         }
 
         File targetFile = new File( targetDirectory, "pmd." + format );
         try ( Writer writer = new OutputStreamWriter( new FileOutputStream( targetFile ), getOutputEncoding() ) )
         {
             targetDirectory.mkdirs();
 
             r.setWriter( writer );
             r.start();
             r.renderFileReport( report );
             r.end();
 
             if ( includeXmlInSite )
             {
                 File siteDir = getReportOutputDirectory();
                 siteDir.mkdirs();
                 FileUtils.copyFile( targetFile, new File( siteDir, "pmd." + format ) );
             }
         }
         catch ( IOException ioe )
         {
             throw new MavenReportException( ioe.getMessage(), ioe );
         }
     }
 
     /**
      * Constructs the PMD configuration class, passing it an argument that configures the target JDK.
      *
      * @return the resulting PMD
      * @throws org.apache.maven.reporting.MavenReportException if targetJdk is not supported
      */
     public PMDConfiguration getPMDConfiguration()
         throws MavenReportException
     {
         PMDConfiguration configuration = new PMDConfiguration();
         LanguageVersion languageVersion = null;
 
         if ( ( "java".equals( language ) || null == language ) && null != targetJdk )
         {
             languageVersion = LanguageRegistry.findLanguageVersionByTerseName( "java " + targetJdk );
             if ( languageVersion == null )
             {
                 throw new MavenReportException( "Unsupported targetJdk value '" + targetJdk + "'." );
             }
         }
         else if ( "javascript".equals( language ) || "ecmascript".equals( language ) )
         {
             languageVersion = LanguageRegistry.findLanguageVersionByTerseName( "ecmascript" );
         }
         else if ( "jsp".equals( language ) )
         {
             languageVersion = LanguageRegistry.findLanguageVersionByTerseName( "jsp" );
         }
 
         if ( languageVersion != null )
         {
             getLog().debug( "Using language " + languageVersion );
             configuration.setDefaultLanguageVersion( languageVersion );
         }
 
         if ( typeResolution )
         {
             try
             {
                 @SuppressWarnings( "unchecked" )
                 List<String> classpath =
                     includeTests ? project.getTestClasspathElements() : project.getCompileClasspathElements();
                 getLog().debug( "Using aux classpath: " + classpath );
                 configuration.prependClasspath( StringUtils.join( classpath.iterator(), File.pathSeparator ) );
             }
             catch ( Exception e )
             {
                 throw new MavenReportException( e.getMessage(), e );
             }
         }
 
         if ( null != suppressMarker )
         {
             configuration.setSuppressMarker( suppressMarker );
         }
 
         configuration.setBenchmark( benchmark );
 
         return configuration;
     }
 
     /**
      * {@inheritDoc}
      */
     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
      */
     public final Renderer createRenderer()
         throws MavenReportException
     {
         Renderer result = null;
         if ( "xml".equals( format ) )
         {
             result = new XMLRenderer( getOutputEncoding() );
         }
         else if ( "txt".equals( format ) )
         {
             result = new TextRenderer();
         }
         else if ( "csv".equals( format ) )
         {
             result = new CSVRenderer();
         }
         else if ( "html".equals( format ) )
         {
             result = new HTMLRenderer();
         }
         else if ( !"".equals( format ) && !"none".equals( format ) )
         {
             try
             {
                 result = (Renderer) Class.forName( format ).getConstructor( Properties.class ).
                                 newInstance( new Properties() );
             }
             catch ( Exception e )
             {
                 throw new MavenReportException( "Can't find PMD custom format " + format + ": "
                     + e.getClass().getName(), e );
             }
         }
 
         return result;
     }
 }