001/*
002 * Copyright (c) 2005-2012 The Regents of the University of California.
003 * All rights reserved.
004 *
005 * '$Author: crawl $'
006 * '$Date: 2014-11-12 23:18:26 +0000 (Wed, 12 Nov 2014) $' 
007 * '$Revision: 33068 $'
008 * 
009 * Permission is hereby granted, without written agreement and without
010 * license or royalty fees, to use, copy, modify, and distribute this
011 * software and its documentation for any purpose, provided that the above
012 * copyright notice and the following two paragraphs appear in all copies
013 * of this software.
014 *
015 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
016 * FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
017 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
018 * THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
019 * SUCH DAMAGE.
020 *
021 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
022 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
023 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
024 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
025 * CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
026 * ENHANCEMENTS, OR MODIFICATIONS.
027 *
028 */
029package org.kepler.stratosphere.io.output;
030
031import java.io.IOException;
032
033import eu.stratosphere.api.java.record.io.FileOutputFormat;
034import eu.stratosphere.types.Record;
035import eu.stratosphere.types.StringValue;
036
037/**
038* Output Format which only sends value to outputs.
039* 
040* @author Jianwu Wang
041* @version $Id: ValueOnlyOutputFormat.java 33068 2014-11-12 23:18:26Z crawl $
042*/
043public class ValueOnlyOutputFormat extends FileOutputFormat {
044        
045        private final StringBuilder buffer = new StringBuilder();
046        
047        @Override
048        public void writeRecord(Record record) throws IOException {
049                this.buffer.setLength(0);
050                final String value = record.getField(1, StringValue.class).toString();
051                if (value.length() > 0){
052                        this.buffer.append(value);
053                        this.buffer.append('\n');
054                }
055                byte[] bytes = this.buffer.toString().getBytes();
056                this.stream.write(bytes);
057        }
058}