001package 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
022import org.apache.maven.scm.CommandParameter;
023import org.apache.maven.scm.CommandParameters;
024import org.apache.maven.scm.ScmException;
025import org.apache.maven.scm.ScmFileSet;
026import org.apache.maven.scm.ScmResult;
027import org.apache.maven.scm.ScmVersion;
028import org.apache.maven.scm.command.AbstractCommand;
029import 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 */
041public 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}