hivesterix/hivesterix-runtime/src/main/java/edu/uci/ics/hivesterix/runtime/factory/comparator/HiveByteBinaryDescComparatorFactory.java

/*
 * Copyright 2009-2013 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hivesterix.runtime.factory.comparator;

import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;

public class HiveByteBinaryDescComparatorFactory implements IBinaryComparatorFactory {
    private static final long serialVersionUID = 1L;

    public static HiveByteBinaryDescComparatorFactory INSTANCE = new HiveByteBinaryDescComparatorFactory();

    private HiveByteBinaryDescComparatorFactory() {
    }

    @Override
    public IBinaryComparator createBinaryComparator() {
        return new IBinaryComparator() {
            private byte left;
            private byte right;

            @Override
            public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
                left = b1[s1];
                right = b2[s2];
                if (left > right)
                    return -1;
                else if (left == right)
                    return 0;
                else
                    return 1;
            }
        };
    }
}