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}