org.apache.mrql.MR_long.java Source code

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Here is the source code for org.apache.mrql.MR_long.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 long values */
final public class MR_long extends MRData {
    private long value;

    public MR_long() {
    }

    public MR_long(long i) {
        value = i;
    }

    public void materializeAll() {
    };

    public long get() {
        return value;
    }

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

    final public void write(DataOutput out) throws IOException {
        out.writeByte(MRContainer.LONG);
        WritableUtils.writeVLong(out, value);
    }

    final public static MR_long read(DataInput in) throws IOException {
        return new MR_long(WritableUtils.readVLong(in));
    }

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

    public int compareTo(MRData x) {
        assert (x instanceof MR_long);
        long v = ((MR_long) 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) {
        try {
            size[0] = 1 + WritableUtils.decodeVIntSize(x[xs]);
            long v = WritableComparator.readVLong(x, xs) - WritableComparator.readVLong(y, ys);
            return (v == 0) ? 0 : ((v > 0) ? 1 : -1);
        } catch (IOException e) {
            throw new Error(e);
        }
    }

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

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

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