/*
 * 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.hyracks.storage.common;

import org.apache.hyracks.api.dataflow.value.IBinaryComparator;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.dataflow.common.data.accessors.ITupleReference;

/**
 * MultiComparator optimized for the special case where there is only a single comparator.
 */
public class SingleComparator extends MultiComparator {

    private final IBinaryComparator cmp;

    protected SingleComparator(IBinaryComparator[] cmps) {
        super(cmps);
        this.cmp = cmps[0];
    }

    @Override
    public int compare(ITupleReference tupleA, ITupleReference tupleB) throws HyracksDataException {
        return cmp.compare(tupleA.getFieldData(0), tupleA.getFieldStart(0), tupleA.getFieldLength(0),
                tupleB.getFieldData(0), tupleB.getFieldStart(0), tupleB.getFieldLength(0));
    }
}
