001    package org.apache.maven.scm.provider.perforce.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.codehaus.plexus.util.cli.StreamConsumer;
023    
024    import java.io.PrintWriter;
025    import java.io.StringWriter;
026    
027    /**
028     * @author Mike Perham
029     * @version $Id: PerforceChangeLogConsumer.java 331276 2005-11-07 15:04:54Z
030     *          evenisse $
031     */
032    public class PerforceDiffConsumer
033        implements StreamConsumer
034    {
035        private StringWriter out = new StringWriter();
036    
037        private PrintWriter output = new PrintWriter( out );
038    
039        /*
040         * I don't see any easy way to distinguish between an error and
041         * normal diff output.  I see two possibilities:
042         *
043         * 1) Use the p4 global "-s" parameter
044         * 2) Check for a non-zero code returned by the p4 process
045         *
046         * We'll do the latter as it's simpler to implement.
047         */
048        /** {@inheritDoc} */
049        public void consumeLine( String line )
050        {
051            output.println( line );
052        }
053    
054        public String getOutput()
055        {
056            output.flush();
057            out.flush();
058            return out.toString();
059        }
060    }