kogiri.common.hadoop.io.datatypes.CompressedSequenceWritable.java Source code

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Here is the source code for kogiri.common.hadoop.io.datatypes.CompressedSequenceWritable.java

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/*
 * Copyright (C) 2015 iychoi
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package kogiri.common.hadoop.io.datatypes;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import kogiri.common.helpers.SequenceHelper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.BinaryComparable;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableComparator;

/**
 *
 * @author iychoi
 */
public class CompressedSequenceWritable extends BinaryComparable implements WritableComparable<BinaryComparable> {

    private static final Log LOG = LogFactory.getLog(CompressedSequenceWritable.class);

    private byte[] compressedSequence;
    private int seqLength;

    private static final int LENGTH_BYTES = 1;

    public CompressedSequenceWritable() {
    }

    public CompressedSequenceWritable(String sequence) throws IOException {
        set(sequence);
    }

    public CompressedSequenceWritable(byte[] compressedSequence, int seqLength) {
        set(compressedSequence, seqLength);
    }

    /**
     * Set the value.
     */
    public void set(byte[] compressedSequence, int seqLength) {
        this.compressedSequence = compressedSequence;
        this.seqLength = seqLength;
    }

    public void set(String sequence) throws IOException {
        this.compressedSequence = SequenceHelper.compress(sequence);
        this.seqLength = sequence.length();
    }

    public void set(CompressedSequenceWritable that) throws IOException {
        this.compressedSequence = that.compressedSequence;
        this.seqLength = that.seqLength;
    }

    public void setEmpty() {
        this.compressedSequence = null;
        this.seqLength = 0;
    }

    public boolean isEmpty() {
        if (this.compressedSequence == null || this.seqLength == 0) {
            return true;
        }
        return false;
    }

    /**
     * Return the value.
     */
    public byte[] getCompressedSequence() {
        return this.compressedSequence;
    }

    public String getSequence() {
        return SequenceHelper.decompress(this.compressedSequence, this.seqLength);
    }

    public int getSequenceLength() {
        return this.seqLength;
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        this.seqLength = in.readByte();
        int byteLen = SequenceHelper.getCompressedSize(this.seqLength);
        this.compressedSequence = new byte[byteLen];
        in.readFully(this.compressedSequence, 0, byteLen);
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeByte(this.seqLength);
        out.write(this.compressedSequence);
    }

    /**
     * Returns true iff
     */
    @Override
    public boolean equals(Object o) {
        if (o instanceof CompressedSequenceWritable) {
            return super.equals(o);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return super.hashCode();
    }

    @Override
    public String toString() {
        return SequenceHelper.decompress(this.compressedSequence, this.seqLength);
    }

    @Override
    public int getLength() {
        return this.compressedSequence.length;
    }

    @Override
    public byte[] getBytes() {
        return this.compressedSequence;
    }

    /** A Comparator optimized for CompressedFastaSequenceWritable. */
    public static class Comparator extends WritableComparator {

        public Comparator() {
            super(CompressedSequenceWritable.class);
        }

        /**
         * Compare the buffers in serialized form.
         */
        public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
            return compareBytes(b1, s1 + LENGTH_BYTES, l1 - LENGTH_BYTES, b2, s2 + LENGTH_BYTES, l2 - LENGTH_BYTES);
        }
    }

    static {
        // register this comparator
        WritableComparator.define(CompressedSequenceWritable.class, new Comparator());
    }
}