org.apache.mrql.MR_double.java Source code

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Here is the source code for org.apache.mrql.MR_double.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.mrql;

import java.io.IOException;
import java.io.DataInput;
import java.io.DataOutput;
import org.apache.hadoop.io.*;
import org.apache.hadoop.fs.*;

/** a container for double values */
final public class MR_double extends MRData {
    private double value;

    public MR_double() {
    }

    public MR_double(double x) {
        value = x;
    }

    public void materializeAll() {
    };

    public double get() {
        return value;
    }

    public void set(double v) {
        value = v;
    }

    final public void write(DataOutput out) throws IOException {
        out.writeByte(MRContainer.DOUBLE);
        out.writeDouble(value);
    }

    final public static MR_double read(DataInput in) throws IOException {
        return new MR_double(in.readDouble());
    }

    public void readFields(DataInput in) throws IOException {
        value = in.readDouble();
    }

    public int compareTo(MRData x) {
        assert (x instanceof MR_double);
        double v = ((MR_double) x).value;
        return (value == v) ? 0 : ((value > v) ? 1 : -1);
    }

    final public static int compare(byte[] x, int xs, int xl, byte[] y, int ys, int yl, int[] size) {
        size[0] = (Double.SIZE >> 3) + 1;
        double v = WritableComparator.readDouble(x, xs) - WritableComparator.readDouble(y, ys);
        return (v == 0) ? 0 : ((v > 0) ? 1 : -1);
    }

    public boolean equals(Object x) {
        return x instanceof MR_double && ((MR_double) x).value == value;
    }

    public int hashCode() {
        return Math.abs((int) Double.doubleToLongBits(value));
    }

    public String toString() {
        return Double.toString(value);
    }
}