de.kp.core.spade.hadoop.EquivalenceClassWritable.java Source code

Introduction

Here is the source code for de.kp.core.spade.hadoop.EquivalenceClassWritable.java

Source

package de.kp.core.spade.hadoop;
/* Copyright (c) 2014 Dr. Krusche & Partner PartG
* 
* This file is part of the Core-SPADE project
* (https://github.com/skrusche63/core-spade).
* 
* Core-SPADE is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
* 
* Core-SPADE is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License along with
* Core-SPADE. 
* 
* If not, see <http://www.gnu.org/licenses/>.
*/

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.List;

import org.apache.hadoop.io.Writable;

import de.kp.core.spade.EquivalenceClass;
import de.kp.core.spade.IDList;
import de.kp.core.spade.Pattern;

/**
 * An EquivalenceClass contains Pattern, IDList and list of EquivalenceClasses
 * that represent subordinate members; it implements WritableComparable to
 * read and write instances from Hadoop's HDFS
 */
public class EquivalenceClassWritable implements Writable {

    private PatternWritable patternWritable;
    private IDListWritable idListWritable;

    /**
     * All the superpatterns of classIdentifier that are obtained by means of 
     * making either an i-extension or s-extension
     */
    private EquivalenceClassListWritable equivClasesWritable;

    public EquivalenceClassWritable() {

        this.patternWritable = new PatternWritable();
        this.equivClasesWritable = new EquivalenceClassListWritable();

        this.idListWritable = new IDListWritable();

    }

    public EquivalenceClassWritable(EquivalenceClass equivClas) {

        this.patternWritable = new PatternWritable(equivClas.getClassIdentifier());
        this.equivClasesWritable = new EquivalenceClassListWritable(equivClas.getClassMembers());

        this.idListWritable = new IDListWritable(equivClas.getIdList());

    }

    /* (non-Javadoc)
     * @see org.apache.hadoop.io.Writable#readFields(java.io.DataInput)
     */
    public void readFields(DataInput in) throws IOException {

        patternWritable.readFields(in);
        equivClasesWritable.readFields(in);

        idListWritable.readFields(in);

    }

    /* (non-Javadoc)
     * @see org.apache.hadoop.io.Writable#write(java.io.DataOutput)
     */
    public void write(DataOutput out) throws IOException {

        patternWritable.write(out);
        equivClasesWritable.write(out);

        idListWritable.write(out);

    }

    public EquivalenceClass get() {

        Pattern pattern = patternWritable.get();
        List<EquivalenceClass> equivClases = equivClasesWritable.get();

        IDList idList = idListWritable.get();
        return new EquivalenceClass(pattern, equivClases, idList);

    }
}