init.UpdateDataMapper.java Source code

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Here is the source code for init.UpdateDataMapper.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 under the License.
 */
package init;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.MapReduceBase;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import org.apache.log4j.Logger;

import java.awt.image.BufferStrategy;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class UpdateDataMapper extends MapReduceBase implements Mapper<WritableComparable, Text, Text, Text> {

    static Logger log = Logger.getLogger(UpdateDataMapper.class);
    private HashMap<String, Integer> fmap = new HashMap<String, Integer>();
    //private final static int supp=0;

    private IntWritable one = new IntWritable(1);
    private Text word = new Text();
    private static Text noneWord = new Text();

    public void map(WritableComparable key, Text values, OutputCollector<Text, Text> output, Reporter reporter)
            throws IOException {

        String[] items = values.toString().split("[ \t\n]");
        if (items.length == 0)
            return;
        StringBuffer result = new StringBuffer();
        int itemLength = 0;
        for (String item : items) {
            if (!fmap.containsKey(item))
                continue;
            if (item.equals(""))
                continue;
            result.append(item + " ");
            itemLength++;
        }
        //      log.info(result);
        //      log.info("lenght ="+items.length );
        if (itemLength == 0) {
            log.debug(result);
            return;
        }
        result.deleteCharAt(result.length() - 1);

        word.set(result.toString());
        output.collect(word, noneWord);

    }

    @Override
    public void configure(JobConf job) {
        // TODO Auto-generated method stub
        super.configure(job);
        fmap = FMap.getFMap(job, job.get("freqPath", "data/freqs/1"));
    }

}