package org.apache.maven.scm.provider.git.gitexe.command;
   
   /*
    * 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 org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.log.ScmLogger;
  import org.codehaus.plexus.util.cli.StreamConsumer;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.util.List;
  
  /**
   * @author <a href="mailto:kenney@apache.org">Kenney Westerhof</a>
   * @author Olivier Lamy
   *
   */
  public abstract class AbstractFileCheckingConsumer
      implements StreamConsumer
  {
      protected ScmLogger logger;
  
      protected File workingDirectory;
  
      private List<ScmFile> files = new ArrayList<ScmFile>();
  
      protected int revision;
  
      private boolean filtered;
  
      public AbstractFileCheckingConsumer( ScmLogger logger, File workingDirectory )
      {
          this.logger = logger;
          this.workingDirectory = workingDirectory;
      }
  
      /** {@inheritDoc} */
      public final void consumeLine( String line )
      {
          if ( line.length() <= 3 )
          {
              return;
          }
  
          if ( logger.isDebugEnabled() )
          {
              logger.debug( line );
          }
  
          parseLine( line );
      }
  
      protected abstract void parseLine( String line );
  
      protected List<ScmFile> getFiles()
      {
          if ( !filtered )
          {
              for ( Iterator<ScmFile> it = files.iterator(); it.hasNext(); )
              {
                  if ( !new File( workingDirectory, it.next().getPath() ).isFile() )
                  {
                      it.remove();
                  }
              }
  
              filtered = true;
          }
  
          return files;
      }
  
      protected final int parseInt( String revisionString )
      {
          try
          {
              return Integer.parseInt( revisionString );
          }
          catch ( NumberFormatException ex )
          {
              return 0;
         }
     }
 
     protected void addFile( ScmFile file )
     {
         files.add( file );
     }
 
     public final int getRevision()
     {
         return revision;
     }
 
 }