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1   package org.apache.maven.scm.command.diff;
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.CommandParameter;
23  import org.apache.maven.scm.CommandParameters;
24  import org.apache.maven.scm.ScmException;
25  import org.apache.maven.scm.ScmFileSet;
26  import org.apache.maven.scm.ScmResult;
27  import org.apache.maven.scm.ScmVersion;
28  import org.apache.maven.scm.command.AbstractCommand;
29  import org.apache.maven.scm.provider.ScmProviderRepository;
30  
31  /**
32   * TODO: Better support for entire filesets.
33   * TODO: Better support for entire changesets (ie consistency between revision handling in CVS and SVN).
34   * TODO: Consistent handling of revisions, tags and dates - currently only revisions supported, though tags will work for CVS
35   *
36   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
37   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
38   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
39   *
40   */
41  public abstract class AbstractDiffCommand
42      extends AbstractCommand
43  {
44      protected abstract DiffScmResult executeDiffCommand( ScmProviderRepository repository, ScmFileSet fileSet,
45                                                           ScmVersion startRevision, ScmVersion endRevision )
46          throws ScmException;
47  
48      /** {@inheritDoc} */
49      public ScmResult executeCommand( ScmProviderRepository repository, ScmFileSet fileSet,
50                                       CommandParameters parameters )
51          throws ScmException
52      {
53          ScmVersion startRevision = parameters.getScmVersion( CommandParameter.START_SCM_VERSION, null );
54  
55          ScmVersion endRevision = parameters.getScmVersion( CommandParameter.END_SCM_VERSION, null );
56  
57          return executeDiffCommand( repository, fileSet, startRevision, endRevision );
58      }
59  }