/*
 * 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.asterix.dataflow.data.nontagged.comparators;

import org.apache.hyracks.api.dataflow.value.IBinaryComparator;
import org.apache.hyracks.api.dataflow.value.IBinaryComparatorFactory;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.api.io.IJsonSerializable;
import org.apache.hyracks.api.io.IPersistedResourceRegistry;
import org.apache.hyracks.data.std.primitive.LongPointable;

import com.fasterxml.jackson.databind.JsonNode;

public class AUUIDPartialBinaryComparatorFactory implements IBinaryComparatorFactory {

    private static final long serialVersionUID = 1L;

    public static final AUUIDPartialBinaryComparatorFactory INSTANCE = new AUUIDPartialBinaryComparatorFactory();

    @Override
    public IBinaryComparator createBinaryComparator() {
        return new IBinaryComparator() {

            @Override
            public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
                int msbCompare = Long.compare(LongPointable.getLong(b1, s1), LongPointable.getLong(b2, s2));
                if (msbCompare == 0) {
                    return Long.compare(LongPointable.getLong(b1, s1 + 8), LongPointable.getLong(b2, s2 + 8));
                } else {
                    return msbCompare;
                }
            }
        };
    }

    @Override
    public JsonNode toJson(IPersistedResourceRegistry registry) throws HyracksDataException {
        return registry.getClassIdentifier(getClass(), serialVersionUID);
    }

    @SuppressWarnings("squid:S1172") // unused parameter
    public static IJsonSerializable fromJson(IPersistedResourceRegistry registry, JsonNode json) {
        return INSTANCE;
    }
}
