core/src/main/java/org/apache/mrql/MR_char.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 a char */
final public class MR_char extends MRData {
    private char value;

    public MR_char () {}

    public MR_char ( char i ) { value = i; }

    public void materializeAll () {};

    public char get () { return value; }

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

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

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

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

    private void writeObject ( ObjectOutputStream out ) throws IOException {
        writeData(out);
    }

    public void writeData ( ObjectOutputStream out ) throws IOException {
        out.writeChar(value);
    }

    private void readObject ( ObjectInputStream in ) throws IOException, ClassNotFoundException {
        readFields(in);
    }

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

    final public static int compare ( byte[] x, int xs, int xl, byte[] y, int ys, int yl, int[] size ) {
        size[0] = 2;
        return x[xs]-y[ys];
    }

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

    public int hashCode () { return value; }

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