BSONWritableComparator.java

/*
 * Copyright 2010-2013 10gen Inc.
 *
 * Licensed 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 com.mongodb.hadoop.io;

import com.mongodb.hadoop.util.BSONComparator;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableComparator;

public class BSONWritableComparator extends WritableComparator {

    private static final Log LOG = LogFactory.getLog(BSONWritableComparator.class);

    public BSONWritableComparator() {
        super(BSONWritable.class, true);
    }

    protected BSONWritableComparator(final Class<? extends WritableComparable> keyClass) {
        super(keyClass, true);
    }

    protected BSONWritableComparator(final Class<? extends WritableComparable> keyClass, final boolean createInstances) {
        super(keyClass, createInstances);
    }

    public int compare(final WritableComparable a, final WritableComparable b) {
        if (a instanceof BSONWritable && b instanceof BSONWritable) {
            return BSONComparator.getInstance().compare(((BSONWritable) a).getDoc(), ((BSONWritable) b).getDoc());
        } else {
            //return super.compare( a, b );
            return -1;
        }
    }

    public int compare(final byte[] b1, final int s1, final int l1, final byte[] b2, final int s2, final int l2) {
        //return BSONComparator.getInstance().compare(b1, s1, l1, b2, s2, l2);
        return super.compare(b1, s1, l1, b2, s2, l2);
    }

    public int compare(final Object a, final Object b) {
        return BSONComparator.getInstance().compare(((BSONWritable) a).getDoc(), ((BSONWritable) b).getDoc());
        //return super.compare( a, b );
    }
}