001/**
002 * Copyright (c) 2011, The University of Southampton and the individual contributors.
003 * All rights reserved.
004 *
005 * Redistribution and use in source and binary forms, with or without modification,
006 * are permitted provided that the following conditions are met:
007 *
008 *   *  Redistributions of source code must retain the above copyright notice,
009 *      this list of conditions and the following disclaimer.
010 *
011 *   *  Redistributions in binary form must reproduce the above copyright notice,
012 *      this list of conditions and the following disclaimer in the documentation
013 *      and/or other materials provided with the distribution.
014 *
015 *   *  Neither the name of the University of Southampton nor the names of its
016 *      contributors may be used to endorse or promote products derived from this
017 *      software without specific prior written permission.
018 *
019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package org.openimaj.hadoop.mapreduce.stage.helper;
031
032import org.apache.hadoop.io.LongWritable;
033import org.apache.hadoop.io.Text;
034import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
035import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
036import org.openimaj.hadoop.mapreduce.stage.Stage;
037
038/**
039 * A helper class for a common stage type. In this case, a stage that goes from
040 * a sequence file to a sequence file with types
041 * 
042 * @author Sina Samangooei (ss@ecs.soton.ac.uk)
043 * @param <MAP_OUTPUT_KEY>
044 *            The key format of the output of the map task (and therefore the
045 *            input of the reduce)
046 * @param <MAP_OUTPUT_VALUE>
047 *            The value format of the output of the map task (and therefore the
048 *            input of the reduce)
049 * @param <OUTPUT_KEY>
050 *            The key format of the output of the reduce task
051 * @param <OUTPUT_VALUE>
052 *            The valueformat of the output of the reduce task
053 * 
054 */
055public abstract class TextSequenceFileStage<MAP_OUTPUT_KEY, MAP_OUTPUT_VALUE, OUTPUT_KEY, OUTPUT_VALUE> extends Stage<
056                        TextInputFormat,
057                        SequenceFileOutputFormat<OUTPUT_KEY, OUTPUT_VALUE>,
058                        LongWritable, Text,
059                        MAP_OUTPUT_KEY, MAP_OUTPUT_VALUE,
060                        OUTPUT_KEY, OUTPUT_VALUE>
061{
062
063}