/*
	* 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.doubles;
import java.util.SortedSet;
import java.util.NoSuchElementException;
A class providing static methods and objects that do useful things with
type-specific sorted sets.
See Also:
Collections/**
 * A class providing static methods and objects that do useful things with
 * type-specific sorted sets.
 *
 * @see java.util.Collections
 */
public final class DoubleSortedSets {
	private DoubleSortedSets() {
	}
	
An immutable class representing the empty sorted set and implementing a
type-specific set interface.

This class may be useful to implement your own in case you subclass a
type-specific sorted set.
/**
	 * An immutable class representing the empty sorted set and implementing a
	 * type-specific set interface.
	 *
	 * <p>
	 * This class may be useful to implement your own in case you subclass a
	 * type-specific sorted set.
	 */
	public static class EmptySet extends DoubleSets.EmptySet
			implements
				DoubleSortedSet,
				java.io.Serializable,
				Cloneable {
		private static final long serialVersionUID = -7046029254386353129L;
		protected EmptySet() {
		}
		@Override

		public DoubleBidirectionalIterator iterator(double from) {
			return DoubleIterators.EMPTY_ITERATOR;
		}
		@Override

		public DoubleSortedSet subSet(double from, double to) {
			return EMPTY_SET;
		}
		@Override

		public DoubleSortedSet headSet(double from) {
			return EMPTY_SET;
		}
		@Override

		public DoubleSortedSet tailSet(double to) {
			return EMPTY_SET;
		}
		@Override
		public double firstDouble() {
			throw new NoSuchElementException();
		}
		@Override
		public double lastDouble() {
			throw new NoSuchElementException();
		}
		@Override
		public DoubleComparator comparator() {
			return null;
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet subSet(Double from, Double to) {
			return EMPTY_SET;
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet headSet(Double from) {
			return EMPTY_SET;
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet tailSet(Double to) {
			return EMPTY_SET;
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double first() {
			throw new NoSuchElementException();
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double last() {
			throw new NoSuchElementException();
		}
		@Override
		public Object clone() {
			return EMPTY_SET;
		}
		private Object readResolve() {
			return EMPTY_SET;
		}
	}
	
An empty sorted set (immutable). It is serializable and cloneable.
/**
	 * An empty sorted set (immutable). It is serializable and cloneable.
	 *
	 */

	public static final EmptySet EMPTY_SET = new EmptySet();
	
A class representing a singleton sorted set.

This class may be useful to implement your own in case you subclass a
type-specific sorted set.
/**
	 * A class representing a singleton sorted set.
	 *
	 * <p>
	 * This class may be useful to implement your own in case you subclass a
	 * type-specific sorted set.
	 */
	public static class Singleton extends DoubleSets.Singleton
			implements
				DoubleSortedSet,
				java.io.Serializable,
				Cloneable {
		private static final long serialVersionUID = -7046029254386353129L;
		final DoubleComparator comparator;
		protected Singleton(final double element, final DoubleComparator comparator) {
			super(element);
			this.comparator = comparator;
		}
		private Singleton(final double element) {
			this(element, null);
		}

		final int compare(final double k1, final double k2) {
			return comparator == null ? (Double.compare((k1), (k2))) : comparator.compare(k1, k2);
		}
		@Override
		public DoubleBidirectionalIterator iterator(double from) {
			DoubleBidirectionalIterator i = iterator();
			if (compare(element, from) <= 0)
				i.nextDouble();
			return i;
		}
		@Override
		public DoubleComparator comparator() {
			return comparator;
		}
		@Override

		public DoubleSortedSet subSet(final double from, final double to) {
			if (compare(from, element) <= 0 && compare(element, to) < 0)
				return this;
			return EMPTY_SET;
		}
		@Override

		public DoubleSortedSet headSet(final double to) {
			if (compare(element, to) < 0)
				return this;
			return EMPTY_SET;
		}
		@Override

		public DoubleSortedSet tailSet(final double from) {
			if (compare(from, element) <= 0)
				return this;
			return EMPTY_SET;
		}
		@Override
		public double firstDouble() {
			return element;
		}
		@Override
		public double lastDouble() {
			return element;
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet subSet(final Double from, final Double to) {
			return subSet((from).doubleValue(), (to).doubleValue());
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet headSet(final Double to) {
			return headSet((to).doubleValue());
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet tailSet(final Double from) {
			return tailSet((from).doubleValue());
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double first() {
			return Double.valueOf(element);
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double last() {
			return Double.valueOf(element);
		}
	}
	
Returns a type-specific immutable sorted set containing only the specified
element. The returned sorted set is serializable and cloneable.
Params:
element – 
           the only element of the returned sorted set.
Returns:
a type-specific immutable sorted set containing just element./**
	 * Returns a type-specific immutable sorted set containing only the specified
	 * element. The returned sorted set is serializable and cloneable.
	 *
	 * @param element
	 *            the only element of the returned sorted set.
	 * @return a type-specific immutable sorted set containing just {@code element}.
	 */
	public static DoubleSortedSet singleton(final double element) {
		return new Singleton(element);
	}
	
Returns a type-specific immutable sorted set containing only the specified
element, and using a specified comparator. The returned sorted set is
serializable and cloneable.
Params:
element – 
           the only element of the returned sorted set.
comparator – 
           the comparator to use in the returned sorted set.
Returns:
a type-specific immutable sorted set containing just element./**
	 * Returns a type-specific immutable sorted set containing only the specified
	 * element, and using a specified comparator. The returned sorted set is
	 * serializable and cloneable.
	 *
	 * @param element
	 *            the only element of the returned sorted set.
	 * @param comparator
	 *            the comparator to use in the returned sorted set.
	 * @return a type-specific immutable sorted set containing just {@code element}.
	 */
	public static DoubleSortedSet singleton(final double element, final DoubleComparator comparator) {
		return new Singleton(element, comparator);
	}
	
Returns a type-specific immutable sorted set containing only the specified
element. The returned sorted set is serializable and cloneable.
Params:
element – 
           the only element of the returned sorted set.
Returns:
a type-specific immutable sorted set containing just element./**
	 * Returns a type-specific immutable sorted set containing only the specified
	 * element. The returned sorted set is serializable and cloneable.
	 *
	 * @param element
	 *            the only element of the returned sorted set.
	 * @return a type-specific immutable sorted set containing just {@code element}.
	 */
	public static DoubleSortedSet singleton(final Object element) {
		return new Singleton(((Double) (element)).doubleValue());
	}
	
Returns a type-specific immutable sorted set containing only the specified
element, and using a specified comparator. The returned sorted set is
serializable and cloneable.
Params:
element – 
           the only element of the returned sorted set.
comparator – 
           the comparator to use in the returned sorted set.
Returns:
a type-specific immutable sorted set containing just element./**
	 * Returns a type-specific immutable sorted set containing only the specified
	 * element, and using a specified comparator. The returned sorted set is
	 * serializable and cloneable.
	 *
	 * @param element
	 *            the only element of the returned sorted set.
	 * @param comparator
	 *            the comparator to use in the returned sorted set.
	 * @return a type-specific immutable sorted set containing just {@code element}.
	 */
	public static DoubleSortedSet singleton(final Object element, final DoubleComparator comparator) {
		return new Singleton(((Double) (element)).doubleValue(), comparator);
	}
	
A synchronized wrapper class for sorted sets. /** A synchronized wrapper class for sorted sets. */
	public static class SynchronizedSortedSet extends DoubleSets.SynchronizedSet
			implements
				DoubleSortedSet,
				java.io.Serializable {
		private static final long serialVersionUID = -7046029254386353129L;
		protected final DoubleSortedSet sortedSet;
		protected SynchronizedSortedSet(final DoubleSortedSet s, final Object sync) {
			super(s, sync);
			sortedSet = s;
		}
		protected SynchronizedSortedSet(final DoubleSortedSet s) {
			super(s);
			sortedSet = s;
		}
		@Override
		public DoubleComparator comparator() {
			synchronized (sync) {
				return sortedSet.comparator();
			}
		}
		@Override
		public DoubleSortedSet subSet(final double from, final double to) {
			return new SynchronizedSortedSet(sortedSet.subSet(from, to), sync);
		}
		@Override
		public DoubleSortedSet headSet(final double to) {
			return new SynchronizedSortedSet(sortedSet.headSet(to), sync);
		}
		@Override
		public DoubleSortedSet tailSet(final double from) {
			return new SynchronizedSortedSet(sortedSet.tailSet(from), sync);
		}
		@Override
		public DoubleBidirectionalIterator iterator() {
			return sortedSet.iterator();
		}
		@Override
		public DoubleBidirectionalIterator iterator(final double from) {
			return sortedSet.iterator(from);
		}
		@Override
		public double firstDouble() {
			synchronized (sync) {
				return sortedSet.firstDouble();
			}
		}
		@Override
		public double lastDouble() {
			synchronized (sync) {
				return sortedSet.lastDouble();
			}
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double first() {
			synchronized (sync) {
				return sortedSet.first();
			}
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double last() {
			synchronized (sync) {
				return sortedSet.last();
			}
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet subSet(final Double from, final Double to) {
			return new SynchronizedSortedSet(sortedSet.subSet(from, to), sync);
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet headSet(final Double to) {
			return new SynchronizedSortedSet(sortedSet.headSet(to), sync);
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet tailSet(final Double from) {
			return new SynchronizedSortedSet(sortedSet.tailSet(from), sync);
		}
	}
	
Returns a synchronized type-specific sorted set backed by the given
type-specific sorted set.
Params:
s – 
           the sorted set to be wrapped in a synchronized sorted set.
See Also:
Collections.synchronizedSortedSet(SortedSet<Object>)
Returns:
a synchronized view of the specified sorted set./**
	 * Returns a synchronized type-specific sorted set backed by the given
	 * type-specific sorted set.
	 *
	 * @param s
	 *            the sorted set to be wrapped in a synchronized sorted set.
	 * @return a synchronized view of the specified sorted set.
	 * @see java.util.Collections#synchronizedSortedSet(SortedSet)
	 */
	public static DoubleSortedSet synchronize(final DoubleSortedSet s) {
		return new SynchronizedSortedSet(s);
	}
	
Returns a synchronized type-specific sorted set backed by the given
type-specific sorted set, using an assigned object to synchronize.
Params:
s – 
           the sorted set to be wrapped in a synchronized sorted set.
sync – 
           an object that will be used to synchronize the access to the
           sorted set.
See Also:
Collections.synchronizedSortedSet(SortedSet<Object>)
Returns:
a synchronized view of the specified sorted set./**
	 * Returns a synchronized type-specific sorted set backed by the given
	 * type-specific sorted set, using an assigned object to synchronize.
	 *
	 * @param s
	 *            the sorted set to be wrapped in a synchronized sorted set.
	 * @param sync
	 *            an object that will be used to synchronize the access to the
	 *            sorted set.
	 * @return a synchronized view of the specified sorted set.
	 * @see java.util.Collections#synchronizedSortedSet(SortedSet)
	 */
	public static DoubleSortedSet synchronize(final DoubleSortedSet s, final Object sync) {
		return new SynchronizedSortedSet(s, sync);
	}
	
An unmodifiable wrapper class for sorted sets. /** An unmodifiable wrapper class for sorted sets. */
	public static class UnmodifiableSortedSet extends DoubleSets.UnmodifiableSet
			implements
				DoubleSortedSet,
				java.io.Serializable {
		private static final long serialVersionUID = -7046029254386353129L;
		protected final DoubleSortedSet sortedSet;
		protected UnmodifiableSortedSet(final DoubleSortedSet s) {
			super(s);
			sortedSet = s;
		}
		@Override
		public DoubleComparator comparator() {
			return sortedSet.comparator();
		}
		@Override
		public DoubleSortedSet subSet(final double from, final double to) {
			return new UnmodifiableSortedSet(sortedSet.subSet(from, to));
		}
		@Override
		public DoubleSortedSet headSet(final double to) {
			return new UnmodifiableSortedSet(sortedSet.headSet(to));
		}
		@Override
		public DoubleSortedSet tailSet(final double from) {
			return new UnmodifiableSortedSet(sortedSet.tailSet(from));
		}
		@Override
		public DoubleBidirectionalIterator iterator() {
			return DoubleIterators.unmodifiable(sortedSet.iterator());
		}
		@Override
		public DoubleBidirectionalIterator iterator(final double from) {
			return DoubleIterators.unmodifiable(sortedSet.iterator(from));
		}
		@Override
		public double firstDouble() {
			return sortedSet.firstDouble();
		}
		@Override
		public double lastDouble() {
			return sortedSet.lastDouble();
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double first() {
			return sortedSet.first();
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Double last() {
			return sortedSet.last();
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet subSet(final Double from, final Double to) {
			return new UnmodifiableSortedSet(sortedSet.subSet(from, to));
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet headSet(final Double to) {
			return new UnmodifiableSortedSet(sortedSet.headSet(to));
		}
		
{@inheritDoc}
Deprecated:
Please use the corresponding type-specific method instead./**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public DoubleSortedSet tailSet(final Double from) {
			return new UnmodifiableSortedSet(sortedSet.tailSet(from));
		}
	}
	
Returns an unmodifiable type-specific sorted set backed by the given
type-specific sorted set.
Params:
s – 
           the sorted set to be wrapped in an unmodifiable sorted set.
See Also:
Collections.unmodifiableSortedSet(SortedSet<Object>)
Returns:
an unmodifiable view of the specified sorted set./**
	 * Returns an unmodifiable type-specific sorted set backed by the given
	 * type-specific sorted set.
	 *
	 * @param s
	 *            the sorted set to be wrapped in an unmodifiable sorted set.
	 * @return an unmodifiable view of the specified sorted set.
	 * @see java.util.Collections#unmodifiableSortedSet(SortedSet)
	 */
	public static DoubleSortedSet unmodifiable(final DoubleSortedSet s) {
		return new UnmodifiableSortedSet(s);
	}
}