chaohParse.uniword.java Source code

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Here is the source code for chaohParse.uniword.java

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/**
 *  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 chaohParse;

import java.io.IOException;
import java.util.StringTokenizer;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.GenericOptionsParser;

public class uniword {

    //enum Counter {LINESKIP,}
    public static class TokenizerMapper extends Mapper<Text, BytesWritable, Text, Text> {

        //private final static Tte one = new IntWritable(1);
        private Text keyInfo = new Text();
        //private Text valueInfo = new Text();
        private Stemmer s = new Stemmer();

        public void map(Text key, BytesWritable value, Context context) throws IOException, InterruptedException {
            String tmp = new String(value.getBytes(), "UTF-8");
            String text = parsexml.getContentlineFromXML(tmp).replaceAll("[^A-Za-z \n]", "").toLowerCase();
            StringTokenizer tokenizer = new StringTokenizer(text);
            while (tokenizer.hasMoreTokens()) {
                s.add(tokenizer.nextToken());
                s.stem();
                keyInfo.set(s.toString());
                context.write(keyInfo, key);
            }
        }
    }

    /*
    public static class myUniwordCombiner extends Reducer<Text, Text, Text, Text>
    {   
       private Text KeyInfo = new Text();
       private Text valueInfo = new Text();
       public void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException{   
       String[] tmpString = key.toString().split("-");
       //int count = 0;
           
       for (Text val : values) {
         count += Integer.parseInt(val.toString());
       }
           
       KeyInfo.set(tmpString[0]);
    //           valueInfo.set(tmpString[1]+":"+count);
       valueInfo.set(tmpString[1]);
        
       context.write(KeyInfo,valueInfo);    
       }
    }
    */
    public static class myUniwordReducer extends Reducer<Text, Text, Text, Text> {
        private Text valueInfo = new Text();

        public void reduce(Text key, Iterable<Text> values, Context context)
                throws IOException, InterruptedException {
            StringBuffer fileList = new StringBuffer();
            for (Text val : values) {
                String string = val.toString();
                fileList.append(string + "-");
            }
            valueInfo.set(fileList.toString());
            context.write(key, valueInfo);
        }
    }

    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
        if (otherArgs.length != 2) {
            System.err.println("Usage: wordcount <in> <out>");
            System.exit(2);
        }
        Job job = new Job(conf, "word count");
        job.setJarByClass(uniword.class);
        job.setMapperClass(TokenizerMapper.class);
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(Text.class);

        //job.setCombinerClass(myUniwordCombiner.class);
        job.setReducerClass(myUniwordReducer.class);

        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        job.setInputFormatClass(ZipFileInputFormat.class);
        FileInputFormat.addInputPath(job, new Path(otherArgs[0]));
        FileOutputFormat.setOutputPath(job, new Path(otherArgs[1]));
        System.exit(job.waitForCompletion(true) ? 0 : 1);
    }
}