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fastutil extends the Java Collections Framework by providing type-specific maps, sets, lists, and queues with a small memory footprint and fast operations; it provides also big (64-bit) arrays, sets, and lists, sorting algorithms, fast, practical I/O classes for binary and text files, and facilities for memory mapping large files. This jar (fastutil-core.jar) contains data structures based on integers, longs, doubles, and objects, only; fastutil.jar contains all classes. If you have both jars in your dependencies, this jar should be excluded.

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/*
	* Copyright (C) 2020-2022 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.doubles;
/**  A type-specific {@link it.unimi.dsi.fastutil.Pair Pair}; provides some additional methods that use polymorphism to avoid (un)boxing. */
public interface DoubleObjectPair  extends it.unimi.dsi.fastutil.Pair {
	/**
	 * Returns the left element of this pair.
	 *
	 * @return the left element of this pair.
	 */
	public double leftDouble();
	/** {@inheritDoc}
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@SuppressWarnings("deprecation")
	@Deprecated
	@Override
	public default Double left() {
	 return Double.valueOf(leftDouble());
	}
	/**
	 * Sets the left element of this pair (optional operation).
	 *
	 * @param l a new value for the left element.
	 *
	 * @implSpec This implementation throws an {@link UnsupportedOperationException}.
	 */
	public default DoubleObjectPair  left(final double l) {
	 throw new UnsupportedOperationException();
	}
	/** {@inheritDoc}
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@SuppressWarnings("deprecation")
	@Deprecated
	@Override
	public default DoubleObjectPair  left(final Double l) {
	 return left((l).doubleValue());
	}
	/**
	 * Returns the left element of this pair.
	 *
	 * @return the left element of this pair.
	 *
	 * @implSpec This implementation delegates to {@link #left()}.
	 *
	 */
	public default double firstDouble() {
	 return leftDouble();
	}
	/** {@inheritDoc}
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@SuppressWarnings("deprecation")
	@Deprecated
	@Override
	public default Double first() {
	 return Double.valueOf(firstDouble());
	}
	/**
	 * Sets the left element of this pair (optional operation).
	 *
	 * @param l a new value for the left element.
	 *
	 * @implSpec This implementation delegates to {@link #left(Object)}.
	 */
	public default DoubleObjectPair  first(final double l) {
	 return left(l);
	}
	/** {@inheritDoc}
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@SuppressWarnings("deprecation")
	@Deprecated
	@Override
	public default DoubleObjectPair  first(final Double l) {
	 return first((l).doubleValue());
	}
	/**
	 * Returns the left element of this pair.
	 *
	 * @return the left element of this pair.
	 *
	 * @implSpec This implementation delegates to {@link #left()}.
	 *
	 */
	public default double keyDouble() {
	 return firstDouble();
	}
	/** {@inheritDoc}
	 * @deprecated Please use the corresponding type-specific method instead.
	 */
	@SuppressWarnings("deprecation")
	@Deprecated
	@Override
	public default Double key() {
	 return Double.valueOf(keyDouble());
	}
	/**
	 * Sets the left element of this pair (optional operation).
	 *
	 * @param l a new value for the left element.
	 *
	 * @implSpec This implementation delegates to {@link #left(Object)}.
	 */
	public default DoubleObjectPair  key(final double l) {
	 return left(l);
	}
	@Override
	@Deprecated
	public default DoubleObjectPair  key(Double l) {
	 return key((l).doubleValue());
	}
	/** Returns a new type-specific immutable {@link it.unimi.dsi.fastutil.Pair Pair} with given left and right value. 
	 * @param left the left value.
	 * @param right the right value.
	 */
	public static  DoubleObjectPair  of(final double left, final V right) {
	 return new DoubleObjectImmutablePair (left, right);
	}
	/**
	 * Returns a lexicographical comparator for pairs.
	 *
	 * 
	 * The comparator returned by this method implements lexicographical order. It compares first
	 * the left elements: if the result of the comparison is nonzero, it returns said result.
	 * Otherwise, this comparator returns the result of the comparison of the right elements.
	 *
	 * @return a lexicographical comparator for pairs.
	 */
	@SuppressWarnings("unchecked")
	public static  java.util.Comparator > lexComparator() {
	 return (x, y) -> {
	  final int t = Double.compare(x.leftDouble(), y.leftDouble());
	  if (t != 0) return t;
	  return ((Comparable )x.right()).compareTo(y.right());
	 };
	}
}