/*
	* Copyright (C) 2002-2019 Sebastiano Vigna
	*
	* 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 it.unimi.dsi.fastutil.longs;
import java.util.Comparator;
A type-specific Comparator; provides methods to compare two primitive types both as objects and as primitive types. 
 Note that fastutil provides a corresponding abstract class that can be used to implement this interface just by specifying the type-specific comparator. 
See Also:
Comparator/**
 * A type-specific {@link Comparator}; provides methods to compare two primitive
 * types both as objects and as primitive types.
 *
 * <p>
 * Note that {@code fastutil} provides a corresponding abstract class that can
 * be used to implement this interface just by specifying the type-specific
 * comparator.
 *
 * @see Comparator
 */
@FunctionalInterface
public interface LongComparator extends Comparator<Long> {
	
Compares its two primitive-type arguments for order. Returns a negative
integer, zero, or a positive integer as the first argument is less than,
equal to, or greater than the second.
See Also:
Comparator
Returns:
a negative integer, zero, or a positive integer as the first argument
        is less than, equal to, or greater than the second./**
	 * Compares its two primitive-type arguments for order. Returns a negative
	 * integer, zero, or a positive integer as the first argument is less than,
	 * equal to, or greater than the second.
	 *
	 * @see java.util.Comparator
	 * @return a negative integer, zero, or a positive integer as the first argument
	 *         is less than, equal to, or greater than the second.
	 */
	int compare(long k1, long k2);
	@Override
	default LongComparator reversed() {
		return LongComparators.oppositeComparator(this);
	}
	
{@inheritDoc}

This implementation delegates to the corresponding type-specific method.
Deprecated:
Please use the corresponding type-specific method instead./**
	 * {@inheritDoc}
	 * <p>
	 * This implementation delegates to the corresponding type-specific method.
	 * 
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@Deprecated
	@Override
	default int compare(Long ok1, Long ok2) {
		return compare(ok1.longValue(), ok2.longValue());
	}
	
Return a new comparator that first uses this comparator, then uses the second
comparator if this comparator compared the two elements as equal.
See Also:
thenComparing.thenComparing(Comparator)/**
	 * Return a new comparator that first uses this comparator, then uses the second
	 * comparator if this comparator compared the two elements as equal.
	 *
	 * @see Comparator#thenComparing(Comparator)
	 */
	default LongComparator thenComparing(LongComparator second) {
		return (LongComparator & java.io.Serializable) (k1, k2) -> {
			int comp = compare(k1, k2);
			return comp == 0 ? second.compare(k1, k2) : comp;
		};
	}
	@Override
	default Comparator<Long> thenComparing(Comparator<? super Long> second) {
		if (second instanceof LongComparator)
			return thenComparing((LongComparator) second);
		return Comparator.super.thenComparing(second);
	}
}