org.apache.mahout.utils.vectors.lucene.SeqFilePrint.java Source code

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Here is the source code for org.apache.mahout.utils.vectors.lucene.SeqFilePrint.java

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/*
 * Copyright 2014 The Apache Software Foundation.
 *
 * 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 org.apache.mahout.utils.vectors.lucene;

import com.google.common.base.Charsets;
import com.google.common.io.Closeables;
import com.google.common.io.Files;
import java.io.BufferedWriter;
import java.io.File;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.commons.cli2.CommandLine;
import org.apache.commons.cli2.Group;
import org.apache.commons.cli2.Option;
import org.apache.commons.cli2.OptionException;
import org.apache.commons.cli2.builder.ArgumentBuilder;
import org.apache.commons.cli2.builder.DefaultOptionBuilder;
import org.apache.commons.cli2.builder.GroupBuilder;
import org.apache.commons.cli2.commandline.Parser;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.mahout.common.AbstractJob;
import org.apache.mahout.utils.vectors.io.DelimitedTermInfoWriter;

/**
 *
 * @author zhaoyufei
 */
public class SeqFilePrint extends AbstractJob {
    public String inputSeqFile = null;
    public String outFile = null;

    public String getInputSeqFile() {
        return inputSeqFile;
    }

    public void setInputSeqFile(String inputSeqFile) {
        this.inputSeqFile = inputSeqFile;
    }

    public String getOutFile() {
        return outFile;
    }

    public void setOutFile(String outFile) {
        this.outFile = outFile;
    }

    public static void main(String[] args) throws OptionException {
        DefaultOptionBuilder obuilder = new DefaultOptionBuilder();
        ArgumentBuilder abuilder = new ArgumentBuilder();
        GroupBuilder gbuilder = new GroupBuilder();

        Option inputOpt = obuilder.withLongName("inputFile").withRequired(true)
                .withArgument(abuilder.withName("inputFile").withMinimum(1).withMaximum(1).create())
                .withDescription("The output of the dictionary as sequence file").withShortName("inputFile")
                .create();

        Option outFileOpt = obuilder.withLongName("outFile").withRequired(true)
                .withArgument(abuilder.withName("outfolder").withMinimum(1).withMaximum(1).create())
                .withDescription("The output of the dictionary as sequence file").withShortName("outFile").create();

        Group group = gbuilder.withName("Options").withOption(inputOpt).withOption(outFileOpt).create();

        SeqFilePrint seqFilePrint = new SeqFilePrint();
        Parser parser = new Parser();
        parser.setGroup(group);
        CommandLine cmdLine = parser.parse(args);
        if (cmdLine.hasOption(inputOpt)) {
            seqFilePrint.setInputSeqFile(cmdLine.getValue(inputOpt).toString());
        }
        if (cmdLine.hasOption(outFileOpt)) {
            seqFilePrint.setOutFile(cmdLine.getValue(outFileOpt).toString());
        }
        try {
            seqFilePrint.run(args);
        } catch (Exception ex) {
            Logger.getLogger(SeqFilePrint.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    @Override
    public int run(String[] strings) throws Exception {
        Configuration conf = getConf();
        FileSystem fs = FileSystem.get(conf);
        Path inputPath = new Path(this.inputSeqFile);
        BufferedWriter br = null;

        File textOutFile = new File(this.outFile);
        Writer writer = Files.newWriter(textOutFile, Charsets.UTF_8);

        SequenceFile.Reader reader = null;
        try {
            reader = new SequenceFile.Reader(fs, inputPath, conf);
            Writable key = (Writable) ReflectionUtils.newInstance(reader.getKeyClass(), conf);
            Writable value = (Writable) ReflectionUtils.newInstance(reader.getValueClass(), conf);
            while (reader.next(key, value)) {
                writer.write(key.toString());
                writer.write(value.toString());
                writer.write('\n');
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeStream(reader);
            Closeables.close(writer, false);

        }

        return 0;
    }
}