core/src/main/java/org/apache/mrql/MR_int.java

/**
 * 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.*;
import org.apache.hadoop.io.*;
import org.apache.hadoop.fs.*;


/** a container for int values */
final public class MR_int extends MRData {
    private int value;

    public MR_int () {}

    public MR_int ( int i ) { value = i; }

    public void materializeAll () {};

    public int get () { return value; }

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

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

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

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

    public int compareTo ( MRData x ) {
        assert(x instanceof MR_int);
        return value - ((MR_int) x).value;
    }

    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]);
            int v = WritableComparator.readVInt(x,xs)-WritableComparator.readVInt(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_int && ((MR_int)x).value==value;
    }

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

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