package org.apache.maven.plugins.checkstyle.exec;
   
   /*
    * 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 com.puppycrawl.tools.checkstyle.api.AuditEvent;
  import com.puppycrawl.tools.checkstyle.api.AuditListener;
  import com.puppycrawl.tools.checkstyle.api.AutomaticBean;
  import com.puppycrawl.tools.checkstyle.api.CheckstyleException;
  import com.puppycrawl.tools.checkstyle.api.Configuration;
  import com.puppycrawl.tools.checkstyle.api.SeverityLevel;
  
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Listener in charge of receiving events from the Checker.
   *
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   *
   */
  public class CheckstyleCheckerListener
      extends AutomaticBean
      implements AuditListener
  {
      private final List<File> sourceDirectories;
  
      private CheckstyleResults results;
  
      private String currentFile;
  
      private List<AuditEvent> events;
  
      private SeverityLevel severityLevel;
  
      private Configuration checkstyleConfiguration;
  
      /**
       * @param sourceDirectory assume that is <code>sourceDirectory</code> is a not null directory and exists
       */
      public CheckstyleCheckerListener( File sourceDirectory )
      {
          this.sourceDirectories = new ArrayList<>();
          this.sourceDirectories.add( sourceDirectory );
      }
      /**
       * @param sourceDirectory assume that is <code>sourceDirectory</code> is a not null directory and exists
       * @param configuration Checkstyle configuration
       * @since 2.5
       */
      public CheckstyleCheckerListener( File sourceDirectory, Configuration configuration )
      {
          this.sourceDirectories = new ArrayList<>();
          this.sourceDirectories.add( sourceDirectory );
          this.checkstyleConfiguration = configuration;
      }
  
      /**
       * @param configuration Checkstyle configuration
       * @since 2.5
       */
      public CheckstyleCheckerListener( Configuration configuration )
      {
          this.sourceDirectories = new ArrayList<>();
          this.checkstyleConfiguration = configuration;
      }
  
      /**
       * @param sourceDirectory assume that is <code>sourceDirectory</code> is a not null directory and exists
       */
      public void addSourceDirectory( File sourceDirectory )
      {
          this.sourceDirectories.add( sourceDirectory );
      }
  
      /**
       * @param severityLevel The severity level of the events to listen to.
       */
      public void setSeverityLevelFilter( SeverityLevel severityLevel )
     {
         this.severityLevel = severityLevel;
     }
 
     /**
      * @return The severity level of the events to listen to.
      */
     public SeverityLevel getSeverityLevelFilter()
     {
         return severityLevel;
     }
 
     /** {@inheritDoc} */
     @Override
     public void auditStarted( AuditEvent event )
     {
         setResults( new CheckstyleResults() );
     }
 
     /** {@inheritDoc} */
     @Override
     public void auditFinished( AuditEvent event )
     {
         //do nothing
     }
 
     /** {@inheritDoc} */
     @Override
     public void fileStarted( AuditEvent event )
     {
         final String fileName = StringUtils.replace( event.getFileName(), "\\", "/" );
 
         for ( File sourceDirectory : sourceDirectories )
         {
             String sourceDirectoryPath = StringUtils.replace( sourceDirectory.getPath(), "\\", "/" );
             
             if ( fileName.startsWith( sourceDirectoryPath + "/" ) )
             {
                 currentFile = StringUtils.substring( fileName, sourceDirectoryPath.length() + 1 );
 
                 events = getResults().getFileViolations( currentFile );
                 
                 break;
             }
         }
 
         if ( events == null )
         {
             events = new ArrayList<>();
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public void fileFinished( AuditEvent event )
     {
         getResults().setFileViolations( currentFile, events );
         currentFile = null;
     }
 
     /** {@inheritDoc} */
     @Override
     public void addError( AuditEvent event )
     {
         if ( SeverityLevel.IGNORE.equals( event.getSeverityLevel() ) )
         {
             return;
         }
 
         if ( severityLevel == null || severityLevel.equals( event.getSeverityLevel() ) )
         {
             events.add( event );
         }
     }
 
     /** {@inheritDoc} */
     @Override
     public void addException( AuditEvent event, Throwable throwable )
     {
         //Do Nothing
     }
 
     /** {@inheritDoc} */
     @Override
     protected void finishLocalSetup() throws CheckstyleException
     {
         //Do Nothing
     }
 
     /**
      * @return The results of Checkstyle invocation.
      */
     public CheckstyleResults getResults()
     {
         results.setConfiguration( checkstyleConfiguration );
         return results;
     }
 
     /**
      * @param results The results of Checkstyle invocation.
      */
     public void setResults( CheckstyleResults results )
     {
         this.results = results;
     }
 
     /**
      * @since 2.5
      * @return The configuration of Checkstyle to use.
      */
     public Configuration getCheckstyleConfiguration()
     {
         return checkstyleConfiguration;
     }
 
     /**
      * @param checkstyleConfiguration The configuration of Checkstyle to use.
      * @since 2.5
      */
     public void setCheckstyleConfiguration( Configuration checkstyleConfiguration )
     {
         this.checkstyleConfiguration = checkstyleConfiguration;
     }
 
 }