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.tools.twitter.token.outputmode.correlation;
031
032import org.apache.hadoop.io.DoubleWritable;
033import org.apache.hadoop.io.LongWritable;
034import org.apache.hadoop.io.NullWritable;
035import org.apache.hadoop.io.Text;
036import org.apache.hadoop.mapreduce.Job;
037import org.apache.hadoop.mapreduce.Mapper;
038import org.apache.hadoop.mapreduce.Reducer;
039import org.openimaj.hadoop.mapreduce.stage.helper.TextSomethingTextStage;
040
041public class CorrelateWordSort extends TextSomethingTextStage<DoubleWritable, Text>{
042        public static final String MAXP_KEY = "org.openimaj.hadoop.tools.twitter.token.outputmode.correlation.maxp";
043        private double maxp;
044
045        public CorrelateWordSort(double maxp) {
046                this.maxp = maxp;
047        }
048
049        @Override
050        public Class<? extends Mapper<LongWritable, Text, DoubleWritable, Text>> mapper() {
051                return PValueWordMapper.class;
052        }
053        
054        @Override
055        public Class<? extends Reducer<DoubleWritable, Text, NullWritable, Text>> reducer() {
056                return PValueWordReducer.class;
057        }
058        @Override
059        public String outname() {
060                return "correlate_sort";
061        }
062        @Override
063        public void setup(Job job) {
064                job.getConfiguration().setFloat(MAXP_KEY, (float) this.maxp);
065                job.setSortComparatorClass(DoubleWritable.Comparator.class);
066        }
067}