package org.apache.maven.plugin.checkstyle;

 /*

  * 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.ByteArrayOutputStream;

 import java.io.File;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.net.URL;

 import java.util.Calendar;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.Iterator;

 import java.util.Locale;

 import java.util.Map;

 import java.util.ResourceBundle;

 import org.apache.maven.doxia.siterenderer.Renderer;

 import org.apache.maven.doxia.tools.SiteTool;

 import org.apache.maven.model.ReportPlugin;

 import org.apache.maven.plugin.checkstyle.rss.CheckstyleRssGenerator;

 import org.apache.maven.plugin.checkstyle.rss.CheckstyleRssGeneratorRequest;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.reporting.AbstractMavenReport;

 import org.apache.maven.reporting.MavenReportException;

 import org.codehaus.plexus.resource.ResourceManager;

 import org.codehaus.plexus.resource.loader.FileResourceLoader;

 import org.codehaus.plexus.util.PathTool;

 import org.codehaus.plexus.util.StringUtils;

 import com.puppycrawl.tools.checkstyle.DefaultLogger;

 import com.puppycrawl.tools.checkstyle.XMLLogger;

 import com.puppycrawl.tools.checkstyle.api.AuditListener;

 import com.puppycrawl.tools.checkstyle.api.CheckstyleException;

 /**

  * Perform a Checkstyle analysis, and generate a report on violations.

  *

  * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>

  * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>

  * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>

  * @version $Id$

  * @goal checkstyle

  * @requiresDependencyResolution compile

  * @threadSafe

  */

 public class CheckstyleReport

     extends AbstractMavenReport

 {

     public static final String PLUGIN_RESOURCES = "org/apache/maven/plugin/checkstyle";

     /**

      * @deprecated Remove with format parameter.

      */

     private static final Map<String, String> FORMAT_TO_CONFIG_LOCATION;

     static

     {

         Map<String, String> fmt2Cfg = new HashMap<String, String>();

         fmt2Cfg.put( "sun", "config/sun_checks.xml" );

         fmt2Cfg.put( "turbine", "config/turbine_checks.xml" );

         fmt2Cfg.put( "avalon", "config/avalon_checks.xml" );

         fmt2Cfg.put( "maven", "config/maven_checks.xml" );

         FORMAT_TO_CONFIG_LOCATION = Collections.unmodifiableMap( fmt2Cfg );

     }

     /**

      * Skip entire check.

      *

      * @parameter expression="${checkstyle.skip}" default-value="false"

      * @since 2.2

      */

     private boolean skip;

     /**

      * The output directory for the report. Note that this parameter is only

      * evaluated if the goal is run directly from the command line. If the goal

      * is run indirectly as part of a site generation, the output directory

      * configured in Maven Site Plugin is used instead.

      *

      * @parameter default-value="${project.reporting.outputDirectory}"

      * @required

      */

     private File outputDirectory;

     /**

      * Specifies if the Rules summary should be enabled or not.

      *

      * @parameter expression="${checkstyle.enable.rules.summary}"

      *            default-value="true"

      */

     private boolean enableRulesSummary;

     /**

      * Specifies if the Severity summary should be enabled or not.

      *

      * @parameter expression="${checkstyle.enable.severity.summary}"

      *            default-value="true"

      */

     private boolean enableSeveritySummary;

     /**

      * Specifies if the Files summary should be enabled or not.

      *

      * @parameter expression="${checkstyle.enable.files.summary}"

      *            default-value="true"

      */

     private boolean enableFilesSummary;

     /**

      * Specifies if the RSS should be enabled or not.

      *

      * @parameter expression="${checkstyle.enable.rss}" default-value="true"

      */

     private boolean enableRSS;

     /**

      * Specifies the names filter of the source files to be used for Checkstyle.

      *

      * @parameter expression="${checkstyle.includes}" default-value="**\/*.java"

      * @required

      */

     private String includes;

     /**

      * Specifies the names filter of the source files to be excluded for

      * Checkstyle.

      *

      * @parameter expression="${checkstyle.excludes}"

      */

     private String excludes;

     /**

      * <p>

      * Specifies the location of the XML configuration to use.

      * </p>

      *

      * <p>

      * Potential values are a filesystem path, a URL, or a classpath resource.

      * This parameter expects that the contents of the location conform to the

      * xml format (Checkstyle <a

      * href="http://checkstyle.sourceforge.net/config.html#Modules">Checker

      * module</a>) configuration of rulesets.

      * </p>

      *

      * <p>

      * This parameter is resolved as resource, URL, then file. If successfully

      * resolved, the contents of the configuration is copied into the

      * <code>${project.build.directory}/checkstyle-configuration.xml</code>

      * file before being passed to Checkstyle as a configuration.

      * </p>

      *

      * <p>

      * There are 4 predefined rulesets.

      * </p>

      *

      * <ul>

      * <li><code>config/sun_checks.xml</code>: Sun Checks.</li>

      * <li><code>config/turbine_checks.xml</code>: Turbine Checks.</li>

      * <li><code>config/avalon_checks.xml</code>: Avalon Checks.</li>

      * <li><code>config/maven_checks.xml</code>: Maven Source Checks.</li>

      * </ul>

      *

      * @parameter expression="${checkstyle.config.location}"

      *            default-value="config/sun_checks.xml"

      */

     private String configLocation;

     /**

      * Specifies what predefined check set to use. Available sets are "sun" (for

      * the Sun coding conventions), "turbine", and "avalon".

      *

      * @parameter default-value="sun"

      * @deprecated Use configLocation instead.

      */

     private String format;

     /**

      * <p>

      * Specifies the location of the properties file.

      * </p>

      *

      * <p>

      * This parameter is resolved as URL, File then resource. If successfully

      * resolved, the contents of the properties location is copied into the

      * <code>${project.build.directory}/checkstyle-checker.properties</code>

      * file before being passed to Checkstyle for loading.

      * </p>

      *

      * <p>

      * The contents of the <code>propertiesLocation</code> will be made

      * available to Checkstyle for specifying values for parameters within the

      * xml configuration (specified in the <code>configLocation</code>

      * parameter).

      * </p>

      *

      * @parameter expression="${checkstyle.properties.location}"

      * @since 2.0-beta-2

      */

     private String propertiesLocation;

     /**

      * Specifies the location of the Checkstyle properties file that will be used to

      * check the source.

      *

      * @parameter

      * @deprecated Use propertiesLocation instead.

      */

     private File propertiesFile;

     /**

      * Specifies the URL of the Checkstyle properties that will be used to check

      * the source.

      *

      * @parameter

      * @deprecated Use propertiesLocation instead.

      */

     private URL propertiesURL;

     /**

      * Allows for specifying raw property expansion information.

      *

      * @parameter

      */

     private String propertyExpansion;

     /**

      * <p>

      * Specifies the location of the License file (a.k.a. the header file) that

      * can be used by Checkstyle to verify that source code has the correct

      * license header.

      * </p>

      * <p>

      * You need to use ${checkstyle.header.file} in your Checkstyle xml

      * configuration to reference the name of this header file.

      * </p>

      * <p>

      * For instance:

      * </p>

      * <p>

      * <code>

      * <module name="RegexpHeader">

      *   <property name="headerFile" value="${checkstyle.header.file}"/>

      * </module>

      * </code>

      * </p>

      *

      * @parameter expression="${checkstyle.header.file}" default-value="LICENSE.txt"

      * @since 2.0-beta-2

      */

     private String headerLocation;

     /**

      * Specifies the location of the License file (a.k.a. the header file) that

      * is used by Checkstyle to verify that source code has the correct

      * license header.

      *

      * @parameter expression="${basedir}/LICENSE.txt"

      * @deprecated Use headerLocation instead.

      */

     private File headerFile;

     /**

      * Specifies the cache file used to speed up Checkstyle on successive runs.

      *

      * @parameter default-value="${project.build.directory}/checkstyle-cachefile"

      */

     private String cacheFile;

     /**

      * If <code>null</code>, the Checkstyle plugin will display violations on stdout.

      * Otherwise, a text file will be created with the violations.

      *

      * @parameter

      */

     private File useFile;

     /**

      * SiteTool.

      *

      * @since 2.2

      * @component role="org.apache.maven.doxia.tools.SiteTool"

      * @required

      * @readonly

      */

     protected SiteTool siteTool;

     /**

      * <p>

      * Specifies the location of the suppressions XML file to use.

      * </p>

      *

      * <p>

      * This parameter is resolved as resource, URL, then file. If successfully

      * resolved, the contents of the suppressions XML is copied into the

      * <code>${project.build.directory}/checkstyle-supressions.xml</code> file

      * before being passed to Checkstyle for loading.

      * </p>

      *

      * <p>

      * See <code>suppressionsFileExpression</code> for the property that will

      * be made available to your checkstyle configuration.

      * </p>

      *

      * @parameter expression="${checkstyle.suppressions.location}"

      * @since 2.0-beta-2

      */

     private String suppressionsLocation;

     /**

      * The key to be used in the properties for the suppressions file.

      *

      * @parameter expression="${checkstyle.suppression.expression}"

      *            default-value="checkstyle.suppressions.file"

      * @since 2.1

      */

     private String suppressionsFileExpression;

     /**

      * Specifies the location of the suppressions XML file to use. The plugin

      * defines a Checkstyle property named

      * <code>checkstyle.suppressions.file</code> with the value of this

      * property. This allows using the Checkstyle property in your own custom

      * checkstyle configuration file when specifying a suppressions file.

      *

      * @parameter

      * @deprecated Use suppressionsLocation instead.

      */

     private String suppressionsFile;

     /**

      * Specifies the path and filename to save the checkstyle output. The format

      * of the output file is determined by the <code>outputFileFormat</code>

      * parameter.

      *

      * @parameter expression="${checkstyle.output.file}"

      *            default-value="${project.build.directory}/checkstyle-result.xml"

      */

     private File outputFile;

     /**

      * Specifies the format of the output to be used when writing to the output

      * file. Valid values are "plain" and "xml".

      *

      * @parameter expression="${checkstyle.output.format}" default-value="xml"

      */

     private String outputFileFormat;

     /**

      * <p>

      * Specifies the location of the package names XML to be used to configure

      * the Checkstyle <a

      * href="http://checkstyle.sourceforge.net/config.html#Packages">Packages</a>.

      * </p>

      *

      * <p>

      * This parameter is resolved as resource, URL, then file. If resolved to a

      * resource, or a URL, the contents of the package names XML is copied into

      * the <code>${project.build.directory}/checkstyle-packagenames.xml</code>

      * file before being passed to Checkstyle for loading.

      * </p>

      *

      * @parameter

      * @since 2.0-beta-2

      */

     private String packageNamesLocation;

     /**

      * Specifies the location of the package names XML to be used to configure

      * Checkstyle.

      *

      * @parameter

      * @deprecated Use packageNamesLocation instead.

      */

     private String packageNamesFile;

     /**

      * Specifies if the build should fail upon a violation.

      *

      * @parameter default-value="false"

      */

     private boolean failsOnError;

     /**

      * Specifies the location of the source directory to be used for Checkstyle.

      *

      * @parameter default-value="${project.build.sourceDirectory}"

      * @required

      */

     private File sourceDirectory;

     /**

      * Specifies the location of the test source directory to be used for

      * Checkstyle.

      *

      * @parameter default-value="${project.build.testSourceDirectory}"

      * @since 2.2

      */

     private File testSourceDirectory;

     /**

      * Include or not the test source directory to be used for Checkstyle.

      *

      * @parameter default-value="${false}"

      * @since 2.2

      */

     private boolean includeTestSourceDirectory;

     /**

      * The Maven Project Object.

      *

      * @parameter default-value="${project}"

      * @required

      * @readonly

      */

     private MavenProject project;

     /**

      * Output errors to console.

      *

      * @parameter default-value="false"

      */

     private boolean consoleOutput;

     /**

      * Link the violation line numbers to the source xref. Will link

      * automatically if Maven JXR plugin is being used.

      *

      * @parameter expression="${linkXRef}" default-value="true"

      * @since 2.1

      */

     private boolean linkXRef;

     /**

      * Location of the Xrefs to link to.

      *

      * @parameter default-value="${project.reporting.outputDirectory}/xref"

      */

     private File xrefLocation;

     /**

      * The file encoding to use when reading the source files. If the property <code>project.build.sourceEncoding</code>

      * is not set, the platform default encoding is used. <strong>Note:</strong> This parameter always overrides the

      * property <code>charset</code> from Checkstyle's <code>TreeWalker</code> module.

      *

      * @parameter expression="${encoding}" default-value="${project.build.sourceEncoding}"

      * @since 2.2

      */

     private String encoding;

     /**

      * @component

      * @required

      * @readonly

      */

     private Renderer siteRenderer;

     private ByteArrayOutputStream stringOutputStream;

     /**

      * @component

      * @required

      * @readonly

      */

     private ResourceManager locator;

     /**

      * CheckstyleRssGenerator.

      *

      * @since 2.4

      * @component role="org.apache.maven.plugin.checkstyle.rss.CheckstyleRssGenerator" role-hint="default"

      * @required

      * @readonly

      */

     protected CheckstyleRssGenerator checkstyleRssGenerator;

     /**

      * @since 2.5

      * @component role="org.apache.maven.plugin.checkstyle.CheckstyleExecutor" role-hint="default"

      * @required

      * @readonly

      */

     protected CheckstyleExecutor checkstyleExecutor;

     /** {@inheritDoc} */

     public String getName( Locale locale )

     {

         return getBundle( locale ).getString( "report.checkstyle.name" );

     }

     /** {@inheritDoc} */

     public String getDescription( Locale locale )

     {

         return getBundle( locale ).getString( "report.checkstyle.description" );

     }

     /** {@inheritDoc} */

     protected String getOutputDirectory()

     {

         return outputDirectory.getAbsolutePath();

     }

     /** {@inheritDoc} */

     protected MavenProject getProject()

     {

         return project;

     }

     /** {@inheritDoc} */

     protected Renderer getSiteRenderer()

     {

         return siteRenderer;

     }

     /** {@inheritDoc} */

     public void executeReport( Locale locale )

         throws MavenReportException

     {

         if ( !skip )

         {

             mergeDeprecatedInfo();

             locator.addSearchPath( FileResourceLoader.ID, project.getFile().getParentFile().getAbsolutePath() );

             locator.addSearchPath( "url", "" );

             locator.setOutputDirectory( new File( project.getBuild().getDirectory() ) );

             if ( !canGenerateReport() )

             {

                 getLog().info( "Source directory does not exist - skipping report." );

                 return;

             }

             // for when we start using maven-shared-io and

             // maven-shared-monitor...

             // locator = new Locator( new MojoLogMonitorAdaptor( getLog() ) );

             // locator = new Locator( getLog(), new File(

             // project.getBuild().getDirectory() ) );

             ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();

             try

             {

                 CheckstyleExecutorRequest request = new CheckstyleExecutorRequest();

                 request.setConsoleListener( getConsoleListener() ).setConsoleOutput( consoleOutput )

                     .setExcludes( excludes ).setFailsOnError( failsOnError ).setIncludes( includes )

                     .setIncludeTestSourceDirectory( includeTestSourceDirectory ).setListener( getListener() )

                     .setLog( getLog() ).setProject( project ).setSourceDirectory( sourceDirectory )

                     .setStringOutputStream( stringOutputStream ).setSuppressionsLocation( suppressionsLocation )

                     .setTestSourceDirectory( testSourceDirectory ).setConfigLocation( configLocation )

                     .setPropertyExpansion( propertyExpansion ).setHeaderLocation( headerLocation )

                     .setCacheFile( cacheFile ).setSuppressionsFileExpression( suppressionsFileExpression )

                     .setEncoding( encoding ).setPropertiesLocation( propertiesLocation );

                 CheckstyleResults results = checkstyleExecutor.executeCheckstyle( request );

                 ResourceBundle bundle = getBundle( locale );

                 generateReportStatics();

                 generateMainReport( results, bundle );

                 if ( enableRSS )

                 {

                     CheckstyleRssGeneratorRequest checkstyleRssGeneratorRequest =

                         new CheckstyleRssGeneratorRequest( this.project, this.getCopyright(), outputDirectory, getLog() );

                     checkstyleRssGenerator.generateRSS( results, checkstyleRssGeneratorRequest );

                 }

             }

             catch ( CheckstyleException e )

             {

                 throw new MavenReportException( "Failed during checkstyle configuration", e );

             }

             catch (CheckstyleExecutorException e)

             {

                 throw new MavenReportException( "Failed during checkstyle execution", e );

             }

             finally

             {

                 //be sure to restore original context classloader

                 Thread.currentThread().setContextClassLoader( currentClassLoader );

             }

         }

     }

     private void generateReportStatics()

         throws MavenReportException

     {

         ReportResource rresource = new ReportResource( PLUGIN_RESOURCES, outputDirectory );

         try

         {

             rresource.copy( "images/rss.png" );

         }

         catch ( IOException e )

         {

             throw new MavenReportException( "Unable to copy static resources.", e );

         }

     }

     private String getCopyright()

     {

         String copyright;

         int currentYear = Calendar.getInstance().get( Calendar.YEAR );

         if ( StringUtils.isNotEmpty( project.getInceptionYear() )

             && !String.valueOf( currentYear ).equals( project.getInceptionYear() ) )

         {

             copyright = project.getInceptionYear() + " - " + currentYear;

         }

         else

         {

             copyright = String.valueOf( currentYear );

         }

         if ( ( project.getOrganization() != null ) && StringUtils.isNotEmpty( project.getOrganization().getName() ) )

         {

             copyright = copyright + " " + project.getOrganization().getName();

         }

         return copyright;

     }

     private void generateMainReport( CheckstyleResults results, ResourceBundle bundle )

     {

         CheckstyleReportGenerator generator = new CheckstyleReportGenerator( getSink(), bundle, project.getBasedir(), siteTool );

         generator.setLog( getLog() );

         generator.setEnableRulesSummary( enableRulesSummary );

         generator.setEnableSeveritySummary( enableSeveritySummary );

         generator.setEnableFilesSummary( enableFilesSummary );

         generator.setEnableRSS( enableRSS );

         generator.setCheckstyleConfig( results.getConfiguration() );

         if ( linkXRef )

         {

             String relativePath = PathTool.getRelativePath( getOutputDirectory(), xrefLocation.getAbsolutePath() );

             if ( StringUtils.isEmpty( relativePath ) )

             {

                 relativePath = ".";

             }

             relativePath = relativePath + "/" + xrefLocation.getName();

             if ( xrefLocation.exists() )

             {

                 // XRef was already generated by manual execution of a lifecycle

                 // binding

                 generator.setXrefLocation( relativePath );

             }

             else

             {

                 // Not yet generated - check if the report is on its way

                 for ( Iterator<ReportPlugin> reports = getProject().getReportPlugins().iterator(); reports.hasNext(); )

                 {

                     ReportPlugin report = reports.next();

                     String artifactId = report.getArtifactId();

                     if ( "maven-jxr-plugin".equals( artifactId ) || "jxr-maven-plugin".equals( artifactId ) )

                     {

                         generator.setXrefLocation( relativePath );

                     }

                 }

             }

             if ( generator.getXrefLocation() == null )

             {

                 getLog().warn( "Unable to locate Source XRef to link to - DISABLED" );

             }

         }

         generator.generateReport( results );

     }

     /**

      * Merge in the deprecated parameters to the new ones, unless the new

      * parameters have values.

      *

      * @deprecated Remove when deprecated params are removed.

      */

     private void mergeDeprecatedInfo()

     {

         if ( "config/sun_checks.xml".equals( configLocation ) && !"sun".equals( format ) )

         {

             configLocation = (String) FORMAT_TO_CONFIG_LOCATION.get( format );

         }

         if ( StringUtils.isEmpty( propertiesLocation ) )

         {

             if ( propertiesFile != null )

             {

                 propertiesLocation = propertiesFile.getPath();

             }

             else if ( propertiesURL != null )

             {

                 propertiesLocation = propertiesURL.toExternalForm();

             }

         }

         if ( "LICENSE.txt".equals( headerLocation ) )

         {

             File defaultHeaderFile = new File( project.getBasedir(), "LICENSE.txt" );

             if ( !defaultHeaderFile.equals( headerFile ) )

             {

                 headerLocation = headerFile.getPath();

             }

         }

         if ( StringUtils.isEmpty( suppressionsLocation ) )

         {

             suppressionsLocation = suppressionsFile;

         }

         if ( StringUtils.isEmpty( packageNamesLocation ) )

         {

             packageNamesLocation = packageNamesFile;

         }

     }

     /** {@inheritDoc} */

     public String getOutputName()

     {

         return "checkstyle";

     }

     private AuditListener getListener()

         throws MavenReportException

     {

         AuditListener listener = null;

         if ( StringUtils.isNotEmpty( outputFileFormat ) )

         {

             File resultFile = outputFile;

             OutputStream out = getOutputStream( resultFile );

             if ( "xml".equals( outputFileFormat ) )

             {

                 listener = new XMLLogger( out, true );

             }

             else if ( "plain".equals( outputFileFormat ) )

             {

                 listener = new DefaultLogger( out, true );

             }

             else

             {

                 // TODO: failure if not a report

                 throw new MavenReportException( "Invalid output file format: (" + outputFileFormat

                     + "). Must be 'plain' or 'xml'." );

             }

         }

         return listener;

     }

     private OutputStream getOutputStream( File file )

         throws MavenReportException

     {

         File parentFile = file.getAbsoluteFile().getParentFile();

         if ( !parentFile.exists() )

         {

             parentFile.mkdirs();

         }

         FileOutputStream fileOutputStream;

         try

         {

             fileOutputStream = new FileOutputStream( file );

         }

         catch ( FileNotFoundException e )

         {

             throw new MavenReportException( "Unable to create output stream: " + file, e );

         }

         return fileOutputStream;

     }

     private DefaultLogger getConsoleListener()

         throws MavenReportException

     {

         DefaultLogger consoleListener;

         if ( useFile == null )

         {

             stringOutputStream = new ByteArrayOutputStream();

             consoleListener = new DefaultLogger( stringOutputStream, false );

         }

         else

         {

             OutputStream out = getOutputStream( useFile );

             consoleListener = new DefaultLogger( out, true );

         }

         return consoleListener;

     }

     private static ResourceBundle getBundle( Locale locale )

     {

         return ResourceBundle.getBundle( "checkstyle-report", locale, CheckstyleReport.class.getClassLoader() );

     }

     /** {@inheritDoc} */

     public boolean canGenerateReport()

     {

         // TODO: would be good to scan the files here

         return sourceDirectory.exists();

     }

     /** {@inheritDoc} */

     public void setReportOutputDirectory( File reportOutputDirectory )

     {

         super.setReportOutputDirectory( reportOutputDirectory );

         this.outputDirectory = reportOutputDirectory;

     }

 }