chaohBIM.BIMGetIndex.java Source code

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Here is the source code for chaohBIM.BIMGetIndex.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 chaohBIM;

import java.io.IOException;
import java.util.HashMap;
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.IntWritable;
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 BIMGetIndex {
    public static HashMap<String, Integer> docsword = new HashMap<String, Integer>();

    public static class tfidfMapper extends Mapper<Text, BytesWritable, Text, Text> {

        //private final static IntWritable 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);
            tmp = key.toString().replace("newsML.xml", "f");
            int count = 0;
            valueInfo.set("1");
            while (tokenizer.hasMoreTokens()) {
                s.add(tokenizer.nextToken());
                s.stem();
                if (stopword.findit(s.toString())) {
                    ++count;
                    keyInfo.set(s.toString() + "-" + tmp);//"word-passage"
                    context.write(keyInfo, valueInfo);
                }
            }
            //System.out.println(tmp.toString()+count);
            docsword.put(tmp, count);
        }
    }

    public static class tfidfCombiner extends Reducer<Text, Text, Text, Text> {
        private Text valueInfo = new Text();
        private Text keyInfo = new Text();

        public void reduce(Text key, Iterable<Text> values, Context context)
                throws IOException, InterruptedException {
            String tmpStrings[] = key.toString().split("-");
            Integer count = 0;
            for (Text val : values) {
                //System.out.println(val.toString());//in order to make the warning disappear
                count += 1;
            }
            keyInfo.set(tmpStrings[0]);
            valueInfo.set(tmpStrings[1] + "@" + docsword.get(tmpStrings[1]) + ":" + count.toString());
            context.write(keyInfo, valueInfo);
        }
    }

    public static class tfidfdReducer 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, "getTfidf");
        job.setJarByClass(BIMGetIndex.class);

        job.setMapperClass(tfidfMapper.class);

        job.setCombinerClass(tfidfCombiner.class);
        job.setReducerClass(tfidfdReducer.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);
    }
}