package org.apache.maven.scm.provider.perforce.command.remove;
   
   /*
    * 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.util.ArrayList;
  import java.util.List;
  
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileStatus;
  import org.apache.maven.scm.provider.perforce.command.AbstractPerforceConsumer;
  import org.apache.regexp.RE;
  import org.apache.regexp.RESyntaxException;
  import org.codehaus.plexus.util.cli.StreamConsumer;
  
  /**
   * @author Mike Perham
   * @author Olivier Lamy
   *
   */
  public class PerforceRemoveConsumer
      extends AbstractPerforceConsumer
      implements StreamConsumer
  {
      private static final String FILE_BEGIN_TOKEN = "//";
  
      private static final String PATTERN = "^([^#]+)#\\d+ - (.*)";
  
      private List<ScmFile> removals = new ArrayList<ScmFile>();
  
      private RE revisionRegexp;
  
      private boolean error = false;
  
      public PerforceRemoveConsumer()
      {
          try
          {
              revisionRegexp = new RE( PATTERN );
          }
          catch ( RESyntaxException ignored )
          {
              ignored.printStackTrace();
          }
      }
  
      public List<ScmFile> getRemovals()
      {
          return removals;
      }
  
      /** {@inheritDoc} */
      public void consumeLine( String line )
      {
          if ( line.startsWith( "... " ) )
          {
              return;
          }
  
          if ( !line.startsWith( FILE_BEGIN_TOKEN ) )
          {
              error( line );
          }
  
          if ( !revisionRegexp.match( line ) )
          {
              error( line );
          }
  
          removals.add( new ScmFile(revisionRegexp.getParen( 1 ), ScmFileStatus.DELETED ) );
      }
  
      private void error( String line )
      {
          error = true;
          output.println( line );
      }
  
      public boolean isSuccess()
      {
          return !error;
      }
  }