001    package org.apache.maven.scm.command.diff;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     * http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import org.apache.maven.scm.CommandParameter;
023    import org.apache.maven.scm.CommandParameters;
024    import org.apache.maven.scm.ScmException;
025    import org.apache.maven.scm.ScmFileSet;
026    import org.apache.maven.scm.ScmResult;
027    import org.apache.maven.scm.ScmVersion;
028    import org.apache.maven.scm.command.AbstractCommand;
029    import org.apache.maven.scm.provider.ScmProviderRepository;
030    
031    /**
032     * TODO: Better support for entire filesets.
033     * TODO: Better support for entire changesets (ie consistency between revision handling in CVS and SVN).
034     * TODO: Consistent handling of revisions, tags and dates - currently only revisions supported, though tags will work for CVS
035     *
036     * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
037     * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>
038     * @author <a href="mailto:brett@apache.org">Brett Porter</a>
039     *
040     */
041    public abstract class AbstractDiffCommand
042        extends AbstractCommand
043    {
044        protected abstract DiffScmResult executeDiffCommand( ScmProviderRepository repository, ScmFileSet fileSet,
045                                                             ScmVersion startRevision, ScmVersion endRevision )
046            throws ScmException;
047    
048        /** {@inheritDoc} */
049        public ScmResult executeCommand( ScmProviderRepository repository, ScmFileSet fileSet,
050                                         CommandParameters parameters )
051            throws ScmException
052        {
053            ScmVersion startRevision = parameters.getScmVersion( CommandParameter.START_SCM_VERSION, null );
054    
055            ScmVersion endRevision = parameters.getScmVersion( CommandParameter.END_SCM_VERSION, null );
056    
057            return executeDiffCommand( repository, fileSet, startRevision, endRevision );
058        }
059    }