001package org.apache.maven.scm.provider.perforce.command.changelog;
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.ScmException;
023import org.apache.maven.scm.log.ScmLogger;
024import org.apache.maven.scm.util.AbstractConsumer;
025import org.apache.regexp.RE;
026import org.apache.regexp.RESyntaxException;
027
028import java.util.ArrayList;
029import java.util.List;
030
031/**
032 * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
033 * @author Olivier Lamy
034 *
035 */
036public class PerforceChangesConsumer
037    extends AbstractConsumer
038{
039    private List<String> entries = new ArrayList<String>();
040
041    /**
042     * The regular expression used to match header lines
043     */
044    private RE revisionRegexp;
045
046    private static final String PATTERN = "^Change (\\d+) " + // changelist number
047        "on (.*) " + // date
048        "by (.*)@"; // author
049
050    public PerforceChangesConsumer( ScmLogger logger )
051    {
052        super( logger );
053
054        try
055        {
056            revisionRegexp = new RE( PATTERN );
057        }
058        catch ( RESyntaxException ignored )
059        {
060            if ( getLogger().isErrorEnabled() )
061            {
062                getLogger().error( "Could not create regexp to parse perforce log file", ignored );
063            }
064        }
065    }
066
067    public List<String> getChanges() throws ScmException
068    {
069        return entries;
070    }
071
072    // ----------------------------------------------------------------------
073    // StreamConsumer Implementation
074    // ----------------------------------------------------------------------
075
076    /** {@inheritDoc} */
077    public void consumeLine( String line )
078    {
079        if( revisionRegexp.match( line ) )
080        {
081            entries.add( revisionRegexp.getParen( 1 ) );
082        }
083    }
084}