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.mode.pointwisemi.sort; 031 032import java.io.IOException; 033import java.io.StringWriter; 034 035import org.apache.hadoop.io.BytesWritable; 036import org.apache.hadoop.io.NullWritable; 037import org.apache.hadoop.io.Text; 038import org.apache.hadoop.mapreduce.Reducer; 039import org.openimaj.hadoop.tools.twitter.token.mode.pointwisemi.count.TokenPairUnaryCount; 040import org.openimaj.io.IOUtils; 041import org.openimaj.util.pair.IndependentPair; 042 043import com.Ostermiller.util.CSVPrinter; 044 045/** 046 * @author Sina Samangooei (ss@ecs.soton.ac.uk) 047 * 048 */ 049public class PMISortReducer extends Reducer<BytesWritable, BytesWritable, NullWritable,Text> { 050 /** 051 * 052 */ 053 public PMISortReducer(){ 054 055 } 056 @Override 057 protected void reduce(BytesWritable timepmi, Iterable<BytesWritable> textvalues, Reducer<BytesWritable,BytesWritable,NullWritable,Text>.Context context) throws IOException ,InterruptedException { 058 String[] firstsecond = new String[2]; 059 for (BytesWritable value : textvalues) { 060 IndependentPair<Long, Double> timepmii = PMIPairSort.parseTimeBinary(timepmi.getBytes()); 061 long time = timepmii.firstObject(); 062 TokenPairUnaryCount tpuc = IOUtils.deserialize(value.getBytes(), TokenPairUnaryCount.class); 063 StringWriter swrit = new StringWriter(); 064 CSVPrinter csvp = new CSVPrinter(swrit); 065 firstsecond[0] = tpuc.firstObject(); 066 firstsecond[1] = tpuc.secondObject(); 067// System.out.println(Arrays.toString(firstsecond)); 068 csvp.write(new String[]{time+"",firstsecond[0],firstsecond[1],tpuc.paircount+"",tpuc.tok1count+"",tpuc.tok2count+"",timepmii.secondObject()+""}); 069 csvp.flush(); 070 context.write(NullWritable.get(), new Text(swrit.toString())); 071 } 072 }; 073}