nl.gridline.free.taalserver.TFIdfSerializeMap.java Source code

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Here is the source code for nl.gridline.free.taalserver.TFIdfSerializeMap.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 */
package nl.gridline.free.taalserver;

import java.io.IOException;

import nl.gridline.free.taalserver.writable.TFIdfWritable;
import nl.gridline.free.taalserver.writable.WordDocId;

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

/**
 * [purpose]
 * <p />
 * Project hadoop-freetaalserver<br />
 * TFIdfSerializeMap.java created Sep 13, 2011
 * <p />
 * Copyright, all rights reserved 2011 GridLine Amsterdam
 * @author <a href="mailto:job@gridline.nl">Job</a>
 * @version $Revision:$, $Date:$
 */
public class TFIdfSerializeMap extends Mapper<WordDocId, TFIdfWritable, Text, NullWritable> {
    private final Text out = new Text();

    @Override
    protected void map(WordDocId key, TFIdfWritable value, Context context)
            throws IOException, InterruptedException {
        // userID,itemID,preference
        StringBuilder b = new StringBuilder().append(key.getWord().hashCode()).append(',').append(key.getDocId())
                .append(',').append(value.getTdIdf());

        out.set(b.toString());
        context.write(out, NullWritable.get());
        context.progress();
    };
}