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1   package org.apache.maven.scm.provider.perforce.command.changelog;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.maven.scm.ScmException;
23  import org.apache.maven.scm.log.ScmLogger;
24  import org.apache.maven.scm.util.AbstractConsumer;
25  import org.apache.regexp.RE;
26  import org.apache.regexp.RESyntaxException;
27  
28  import java.util.ArrayList;
29  import java.util.List;
30  
31  /**
32   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
33   * @author Olivier Lamy
34   *
35   */
36  public class PerforceChangesConsumer
37      extends AbstractConsumer
38  {
39      private List<String> entries = new ArrayList<String>();
40  
41      /**
42       * The regular expression used to match header lines
43       */
44      private RE revisionRegexp;
45  
46      private static final String PATTERN = "^Change (\\d+) " + // changelist number
47          "on (.*) " + // date
48          "by (.*)@"; // author
49  
50      public PerforceChangesConsumer( ScmLogger logger )
51      {
52          super( logger );
53  
54          try
55          {
56              revisionRegexp = new RE( PATTERN );
57          }
58          catch ( RESyntaxException ignored )
59          {
60              if ( getLogger().isErrorEnabled() )
61              {
62                  getLogger().error( "Could not create regexp to parse perforce log file", ignored );
63              }
64          }
65      }
66  
67      public List<String> getChanges() throws ScmException
68      {
69          return entries;
70      }
71  
72      // ----------------------------------------------------------------------
73      // StreamConsumer Implementation
74      // ----------------------------------------------------------------------
75  
76      /** {@inheritDoc} */
77      public void consumeLine( String line )
78      {
79          if( revisionRegexp.match( line ) )
80          {
81              entries.add( revisionRegexp.getParen( 1 ) );
82          }
83      }
84  }