com.talis.mapreduce.dicenc.ThirdReducer.java Source code

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Here is the source code for com.talis.mapreduce.dicenc.ThirdReducer.java

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/*
 * Copyright  2011 Talis Systems Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.talis.mapreduce.dicenc;

import java.io.IOException;

import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;

public class ThirdReducer extends Reducer<Text, Text, NullWritable, Text> {

    @Override
    public void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {

        String s = null;
        String p = null;
        String o = null;
        String g = null;

        for (Text value : values) {
            String[] v = value.toString().split("-");

            if (v[1].equals("s"))
                s = v[0];
            if (v[1].equals("p"))
                p = v[0];
            if (v[1].equals("o"))
                o = v[0];
            if (v[1].equals("g"))
                g = v[0];
        }

        if (g != null) {
            context.write(NullWritable.get(), new Text(s + " " + p + " " + o + " " + g));
        } else if ((s != null) && (p != null) && (o != null)) {
            context.write(NullWritable.get(), new Text(s + " " + p + " " + o));
        }
    }

}