org.sf.xrime.algorithms.transform.vertex.Vertex2LabeledTransformer.java Source code

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Here is the source code for org.sf.xrime.algorithms.transform.vertex.Vertex2LabeledTransformer.java

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/*
 * Copyright (C) IBM Corp. 2009.
 * 
 * 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.sf.xrime.algorithms.transform.vertex;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.SequenceFileInputFormat;
import org.apache.hadoop.mapred.SequenceFileOutputFormat;
import org.apache.hadoop.util.ToolRunner;
import org.sf.xrime.ProcessorExecutionException;
import org.sf.xrime.Transformer;
import org.sf.xrime.model.label.LabelAdder;
import org.sf.xrime.model.vertex.LabeledAdjBiSetVertex;
import org.sf.xrime.model.vertex.LabeledAdjSetVertex;
import org.sf.xrime.model.vertex.Vertex;

public class Vertex2LabeledTransformer extends Transformer {
    static final public String labelFactoryKey = "xrime.transformer.tolabeled.factory";

    /**
     * The mapper output value class.
     */
    protected Class<?> theClass = null;

    /**
     * The class used to add labels to output value.
     */
    protected Class<? extends LabelAdder> theLabelAdderClass = null;

    /**
     * Default constructor.
     */
    public Vertex2LabeledTransformer() {
        super();
    }

    /**
     * Normal constructor.
     * @param src date source dir
     * @param dest date destination dir
     */
    public Vertex2LabeledTransformer(Path src, Path dest) {
        super(src, dest);
    }

    public void setOutputValueClass(Class<?> theClass) {
        this.theClass = theClass;
    }

    public void setLabelAdderClass(Class<? extends LabelAdder> theLabelAdderClass) {
        this.theLabelAdderClass = theLabelAdderClass;
    }

    @Override
    public void setArguments(String[] params) throws ProcessorExecutionException {
        List<String> other_args = new ArrayList<String>();
        for (int i = 0; i < params.length; ++i) {
            try {
                if ("-t".equals(params[i])) {
                    char option = params[++i].charAt(0);
                    if (option == 'a') {
                        setOutputValueClass(LabeledAdjSetVertex.class);
                    } else if (option == 's') {
                        setOutputValueClass(LabeledAdjSetVertex.class);
                    }
                    if (option == 'b') {
                        setOutputValueClass(LabeledAdjBiSetVertex.class);
                    }
                } else {
                    other_args.add(params[i]);
                }
            } catch (NumberFormatException except) {
                throw new ProcessorExecutionException(except);
            } catch (ArrayIndexOutOfBoundsException except) {
                throw new ProcessorExecutionException(except);
            }
        }
        // Make sure there are exactly 2 parameters left.
        if (other_args.size() != 2) {
            throw new ProcessorExecutionException(
                    "Wrong number of parameters: " + other_args.size() + " instead of 2.");
        }

        setSrcPath(new Path(other_args.get(0)));
        setDestPath(new Path(other_args.get(1)));
    }

    @Override
    public void execute() throws ProcessorExecutionException {
        JobConf jobConf = new JobConf(conf, Vertex2LabeledTransformer.class);
        jobConf.setJobName("Vertex2Labelled");

        jobConf.setMapperClass(Vertex2LabeledMapper.class);
        jobConf.setNumReduceTasks(0);
        jobConf.setOutputKeyClass(Text.class);
        if (this.theClass == null) {
            throw new ProcessorExecutionException("Need to specify the output value class.");
        }
        jobConf.setOutputValueClass(this.theClass);
        jobConf.setMapOutputKeyClass(Text.class);
        jobConf.setMapOutputValueClass(Vertex.class);
        jobConf.setInputFormat(SequenceFileInputFormat.class);
        jobConf.setOutputFormat(SequenceFileOutputFormat.class);
        if (theLabelAdderClass != null) {
            jobConf.setClass(labelFactoryKey, theLabelAdderClass, LabelAdder.class);
        }
        FileInputFormat.setInputPaths(jobConf, srcPath);
        FileOutputFormat.setOutputPath(jobConf, destPath);

        try {
            this.runningJob = JobClient.runJob(jobConf);
        } catch (IOException e) {
            throw new ProcessorExecutionException(e);
        }
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        try {
            int res = ToolRunner.run(new Vertex2LabeledTransformer(), args);
            System.exit(res);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}