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/* Generic definitions */
/* Assertions (useful to generate conditional code) */
/* Current type and class (and size, if applicable) */
/* Value methods */
/* Interfaces (keys) */
/* Interfaces (values) */
/* Abstract implementations (keys) */
/* Abstract implementations (values) */
/* Static containers (keys) */
/* Static containers (values) */
/* Implementations */
/* Synchronized wrappers */
/* Unmodifiable wrappers */
/* Other wrappers */
/* Methods (keys) */
/* Methods (values) */
/* Methods (keys/values) */
/* Methods that have special names depending on keys (but the special names depend on values) */
/* Equality */
/* Object/Reference-only definitions (keys) */
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/*
* Copyright (C) 2002-2016 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.
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* limitations under the License.
*/
package it.unimi.dsi.fastutil.shorts;
import java.util.Collection;
import java.util.Set;
/**
* A class providing static methods and objects that do useful things with
* type-specific sets.
*
* @see java.util.Collections
*/
public class ShortSets {
private ShortSets() {
}
/**
* An immutable class representing the empty set and implementing a
* type-specific set interface.
*
*
* This class may be useful to implement your own in case you subclass a
* type-specific set.
*/
public static class EmptySet extends ShortCollections.EmptyCollection implements ShortSet, java.io.Serializable, Cloneable {
private static final long serialVersionUID = -7046029254386353129L;
protected EmptySet() {
}
public boolean remove(short ok) {
throw new UnsupportedOperationException();
}
public Object clone() {
return EMPTY_SET;
}
@SuppressWarnings("rawtypes")
public boolean equals(final Object o) {
return o instanceof Set && ((Set) o).isEmpty();
}
private Object readResolve() {
return EMPTY_SET;
}
}
/**
* An empty set (immutable). It is serializable and cloneable.
*/
public static final EmptySet EMPTY_SET = new EmptySet();
/**
* An immutable class representing a type-specific singleton set.
*
*
* This class may be useful to implement your own in case you subclass a
* type-specific set.
*/
public static class Singleton extends AbstractShortSet implements java.io.Serializable, Cloneable {
private static final long serialVersionUID = -7046029254386353129L;
protected final short element;
protected Singleton(final short element) {
this.element = element;
}
public boolean add(final short k) {
throw new UnsupportedOperationException();
}
public boolean contains(final short k) {
return ((k) == (element));
}
public boolean addAll(final Collection c) {
throw new UnsupportedOperationException();
}
public boolean removeAll(final Collection c) {
throw new UnsupportedOperationException();
}
public boolean retainAll(final Collection c) {
throw new UnsupportedOperationException();
}
/* Slightly optimized w.r.t. the one in ABSTRACT_SET. */
public short[] toShortArray() {
short a[] = new short[1];
a[0] = element;
return a;
}
public boolean addAll(final ShortCollection c) {
throw new UnsupportedOperationException();
}
public boolean removeAll(final ShortCollection c) {
throw new UnsupportedOperationException();
}
public boolean retainAll(final ShortCollection c) {
throw new UnsupportedOperationException();
}
public ShortListIterator iterator() {
return ShortIterators.singleton(element);
}
public int size() {
return 1;
}
public Object clone() {
return this;
}
}
/**
* Returns a type-specific immutable set containing only the specified
* element. The returned set is serializable and cloneable.
*
* @param element
* the only element of the returned set.
* @return a type-specific immutable set containing just
* element.
*/
public static ShortSet singleton(final short element) {
return new Singleton(element);
}
/**
* Returns a type-specific immutable set containing only the specified
* element. The returned set is serializable and cloneable.
*
* @param element
* the only element of the returned set.
* @return a type-specific immutable set containing just
* element.
*/
public static ShortSet singleton(final Short element) {
return new Singleton(((element).shortValue()));
}
/** A synchronized wrapper class for sets. */
public static class SynchronizedSet extends ShortCollections.SynchronizedCollection implements ShortSet, java.io.Serializable {
private static final long serialVersionUID = -7046029254386353129L;
protected SynchronizedSet(final ShortSet s, final Object sync) {
super(s, sync);
}
protected SynchronizedSet(final ShortSet s) {
super(s);
}
public boolean remove(final short k) {
synchronized (sync) {
return collection.remove((Short.valueOf(k)));
}
}
public boolean equals(final Object o) {
synchronized (sync) {
return collection.equals(o);
}
}
public int hashCode() {
synchronized (sync) {
return collection.hashCode();
}
}
}
/**
* Returns a synchronized type-specific set backed by the given
* type-specific set.
*
* @param s
* the set to be wrapped in a synchronized set.
* @return a synchronized view of the specified set.
* @see java.util.Collections#synchronizedSet(Set)
*/
public static ShortSet synchronize(final ShortSet s) {
return new SynchronizedSet(s);
}
/**
* Returns a synchronized type-specific set backed by the given
* type-specific set, using an assigned object to synchronize.
*
* @param s
* the set to be wrapped in a synchronized set.
* @param sync
* an object that will be used to synchronize the access to the
* set.
* @return a synchronized view of the specified set.
* @see java.util.Collections#synchronizedSet(Set)
*/
public static ShortSet synchronize(final ShortSet s, final Object sync) {
return new SynchronizedSet(s, sync);
}
/** An unmodifiable wrapper class for sets. */
public static class UnmodifiableSet extends ShortCollections.UnmodifiableCollection implements ShortSet, java.io.Serializable {
private static final long serialVersionUID = -7046029254386353129L;
protected UnmodifiableSet(final ShortSet s) {
super(s);
}
public boolean remove(final short k) {
throw new UnsupportedOperationException();
}
public boolean equals(final Object o) {
return collection.equals(o);
}
public int hashCode() {
return collection.hashCode();
}
}
/**
* Returns an unmodifiable type-specific set backed by the given
* type-specific set.
*
* @param s
* the set to be wrapped in an unmodifiable set.
* @return an unmodifiable view of the specified set.
* @see java.util.Collections#unmodifiableSet(Set)
*/
public static ShortSet unmodifiable(final ShortSet s) {
return new UnmodifiableSet(s);
}
}