org.apache.mrql.MR_string.java Source code

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Here is the source code for org.apache.mrql.MR_string.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 strings */
final public class MR_string extends MRData {
    private String value;

    public MR_string() {
    }

    public MR_string(String s) {
        value = s;
    }

    public void materializeAll() {
    };

    public String get() {
        return value;
    }

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

    final public void write(DataOutput out) throws IOException {
        out.writeByte(MRContainer.STRING);
        Text.writeString(out, value);
    }

    final public static MR_string read(DataInput in) throws IOException {
        return new MR_string(Text.readString(in));
    }

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

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

    final static Text.Comparator comparator = new Text.Comparator();

    final public static int compare(byte[] x, int xs, int xl, byte[] y, int ys, int yl, int[] size) {
        try {
            size[0] = 1 + WritableComparator.readVInt(x, xs) + WritableUtils.decodeVIntSize(x[xs]);
            return comparator.compare(x, xs, xl, y, ys, yl);
        } catch (IOException e) {
            throw new Error(e);
        }
    }

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

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

    public String toString() {
        return "\"" + value + "\"";
    }
}