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• ShortSortedSets.java

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it.unimi.dsi.fastutil.shorts.ShortSortedSets Maven / Gradle / Ivy

/*
	* Copyright (C) 2002-2023 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.shorts;

import java.util.SortedSet;
import java.util.NoSuchElementException;
import it.unimi.dsi.fastutil.ints.IntSpliterator;
import it.unimi.dsi.fastutil.ints.IntSpliterators;

/**
 * A class providing static methods and objects that do useful things with type-specific sorted
 * sets.
 *
 * @see java.util.Collections
 */
public final class ShortSortedSets {
	private ShortSortedSets() {
	}

	/**
	 * 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.
	 */
	public static class EmptySet extends ShortSets.EmptySet implements ShortSortedSet, java.io.Serializable, Cloneable {
		private static final long serialVersionUID = -7046029254386353129L;

		protected EmptySet() {
		}

		@Override

		public ShortBidirectionalIterator iterator(short from) {
			return ShortIterators.EMPTY_ITERATOR;
		}

		@Override

		public ShortSortedSet subSet(short from, short to) {
			return EMPTY_SET;
		}

		@Override

		public ShortSortedSet headSet(short from) {
			return EMPTY_SET;
		}

		@Override

		public ShortSortedSet tailSet(short to) {
			return EMPTY_SET;
		}

		@Override
		public short firstShort() {
			throw new NoSuchElementException();
		}

		@Override
		public short lastShort() {
			throw new NoSuchElementException();
		}

		@Override
		public ShortComparator comparator() {
			return null;
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet subSet(Short from, Short to) {
			return EMPTY_SET;
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet headSet(Short from) {
			return EMPTY_SET;
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet tailSet(Short to) {
			return EMPTY_SET;
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short first() {
			throw new NoSuchElementException();
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short 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.
	 *
	 */

	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.
	 *
	 */
	public static class Singleton extends ShortSets.Singleton implements ShortSortedSet, java.io.Serializable, Cloneable {
		private static final long serialVersionUID = -7046029254386353129L;
		final ShortComparator comparator;

		protected Singleton(final short element, final ShortComparator comparator) {
			super(element);
			this.comparator = comparator;
		}

		Singleton(final short element) {
			this(element, null);
		}

		final int compare(final short k1, final short k2) {
			return comparator == null ? (Short.compare((k1), (k2))) : comparator.compare(k1, k2);
		}

		@Override
		public ShortBidirectionalIterator iterator(short from) {
			ShortBidirectionalIterator i = iterator();
			if (compare(element, from) <= 0) i.nextShort();
			return i;
		}

		@Override
		public ShortComparator comparator() {
			return comparator;
		}

		@Override
		public ShortSpliterator spliterator() {
			return ShortSpliterators.singleton(element, comparator);
		}

		@Override

		public ShortSortedSet subSet(final short from, final short to) {
			if (compare(from, element) <= 0 && compare(element, to) < 0) return this;
			return EMPTY_SET;
		}

		@Override

		public ShortSortedSet headSet(final short to) {
			if (compare(element, to) < 0) return this;
			return EMPTY_SET;
		}

		@Override

		public ShortSortedSet tailSet(final short from) {
			if (compare(from, element) <= 0) return this;
			return EMPTY_SET;
		}

		@Override
		public short firstShort() {
			return element;
		}

		@Override
		public short lastShort() {
			return element;
		}

		@Override
		public IntSpliterator intSpliterator() {
			return IntSpliterators.singleton(element, (int left, int right) -> comparator().compare(it.unimi.dsi.fastutil.SafeMath.safeIntToShort(left), it.unimi.dsi.fastutil.SafeMath.safeIntToShort(right)));
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet subSet(final Short from, final Short to) {
			return subSet((from).shortValue(), (to).shortValue());
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet headSet(final Short to) {
			return headSet((to).shortValue());
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet tailSet(final Short from) {
			return tailSet((from).shortValue());
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short first() {
			return Short.valueOf(element);
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short last() {
			return Short.valueOf(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 ShortSortedSet singleton(final short 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.
	 *
	 * @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 ShortSortedSet singleton(final short element, final ShortComparator 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.
	 *
	 * @param element the only element of the returned sorted set.
	 * @return a type-specific immutable sorted set containing just {@code element}.
	 */
	public static ShortSortedSet singleton(final Object element) {
		return new Singleton(((Short)(element)).shortValue());
	}

	/**
	 * 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 ShortSortedSet singleton(final Object element, final ShortComparator comparator) {
		return new Singleton(((Short)(element)).shortValue(), comparator);
	}

	/** A synchronized wrapper class for sorted sets. */
	public static class SynchronizedSortedSet extends ShortSets.SynchronizedSet implements ShortSortedSet, java.io.Serializable {
		private static final long serialVersionUID = -7046029254386353129L;
		protected final ShortSortedSet sortedSet;

		protected SynchronizedSortedSet(final ShortSortedSet s, final Object sync) {
			super(s, sync);
			sortedSet = s;
		}

		protected SynchronizedSortedSet(final ShortSortedSet s) {
			super(s);
			sortedSet = s;
		}

		@Override
		public ShortComparator comparator() {
			synchronized (sync) {
				return sortedSet.comparator();
			}
		}

		@Override
		public ShortSortedSet subSet(final short from, final short to) {
			return new SynchronizedSortedSet(sortedSet.subSet(from, to), sync);
		}

		@Override
		public ShortSortedSet headSet(final short to) {
			return new SynchronizedSortedSet(sortedSet.headSet(to), sync);
		}

		@Override
		public ShortSortedSet tailSet(final short from) {
			return new SynchronizedSortedSet(sortedSet.tailSet(from), sync);
		}

		@Override
		public ShortBidirectionalIterator iterator() {
			return sortedSet.iterator();
		}

		@Override
		public ShortBidirectionalIterator iterator(final short from) {
			return sortedSet.iterator(from);
		}

		@Override
		public short firstShort() {
			synchronized (sync) {
				return sortedSet.firstShort();
			}
		}

		@Override
		public short lastShort() {
			synchronized (sync) {
				return sortedSet.lastShort();
			}
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short first() {
			synchronized (sync) {
				return sortedSet.first();
			}
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short last() {
			synchronized (sync) {
				return sortedSet.last();
			}
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet subSet(final Short from, final Short to) {
			return new SynchronizedSortedSet(sortedSet.subSet(from, to), sync);
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet headSet(final Short to) {
			return new SynchronizedSortedSet(sortedSet.headSet(to), sync);
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet tailSet(final Short from) {
			return new SynchronizedSortedSet(sortedSet.tailSet(from), sync);
		}
	}

	/**
	 * 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 ShortSortedSet synchronize(final ShortSortedSet 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.
	 *
	 * @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 ShortSortedSet synchronize(final ShortSortedSet s, final Object sync) {
		return new SynchronizedSortedSet(s, sync);
	}

	/** An unmodifiable wrapper class for sorted sets. */
	public static class UnmodifiableSortedSet extends ShortSets.UnmodifiableSet implements ShortSortedSet, java.io.Serializable {
		private static final long serialVersionUID = -7046029254386353129L;
		protected final ShortSortedSet sortedSet;

		protected UnmodifiableSortedSet(final ShortSortedSet s) {
			super(s);
			sortedSet = s;
		}

		@Override
		public ShortComparator comparator() {
			return sortedSet.comparator();
		}

		@Override
		public ShortSortedSet subSet(final short from, final short to) {
			return new UnmodifiableSortedSet(sortedSet.subSet(from, to));
		}

		@Override
		public ShortSortedSet headSet(final short to) {
			return new UnmodifiableSortedSet(sortedSet.headSet(to));
		}

		@Override
		public ShortSortedSet tailSet(final short from) {
			return new UnmodifiableSortedSet(sortedSet.tailSet(from));
		}

		@Override
		public ShortBidirectionalIterator iterator() {
			return ShortIterators.unmodifiable(sortedSet.iterator());
		}

		@Override
		public ShortBidirectionalIterator iterator(final short from) {
			return ShortIterators.unmodifiable(sortedSet.iterator(from));
		}

		@Override
		public short firstShort() {
			return sortedSet.firstShort();
		}

		@Override
		public short lastShort() {
			return sortedSet.lastShort();
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short first() {
			return sortedSet.first();
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public Short last() {
			return sortedSet.last();
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet subSet(final Short from, final Short to) {
			return new UnmodifiableSortedSet(sortedSet.subSet(from, to));
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet headSet(final Short to) {
			return new UnmodifiableSortedSet(sortedSet.headSet(to));
		}

		/**
		 * {@inheritDoc}
		 * 
		 * @deprecated Please use the corresponding type-specific method instead.
		 */
		@Deprecated
		@Override
		public ShortSortedSet tailSet(final Short from) {
			return new UnmodifiableSortedSet(sortedSet.tailSet(from));
		}
	}

	/**
	 * 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 ShortSortedSet unmodifiable(final ShortSortedSet s) {
		return new UnmodifiableSortedSet(s);
	}
}