it.unimi.dsi.fastutil.objects
Class ObjectSets

java.lang.Object
  extended by it.unimi.dsi.fastutil.objects.ObjectSets

public class ObjectSets
extends java.lang.Object

A class providing static methods and objects that do useful things with type-specific sets.

See Also:
Collections

Nested Class Summary
static class ObjectSets.EmptySet<K>
          An immutable class representing the empty set and implementing a type-specific set interface.
static class ObjectSets.Singleton<K>
          An immutable class representing a type-specific singleton set.
static class ObjectSets.SynchronizedSet<K>
          A synchronized wrapper class for sets.
static class ObjectSets.UnmodifiableSet<K>
          An unmodifiable wrapper class for sets.
 
Field Summary
static ObjectSets.EmptySet EMPTY_SET
          An empty set (immutable).
 
Method Summary
static
<K> ObjectSet<K>
singleton(K element)
          Returns a type-specific immutable set containing only the specified element.
static
<K> ObjectSet<K>
synchronize(ObjectSet<K> s)
          Returns a synchronized type-specific set backed by the given type-specific set.
static
<K> ObjectSet<K>
synchronize(ObjectSet<K> s, java.lang.Object sync)
          Returns a synchronized type-specific set backed by the given type-specific set, using an assigned object to synchronize.
static
<K> ObjectSet<K>
unmodifiable(ObjectSet<K> s)
          Returns an unmodifiable type-specific set backed by the given type-specific set.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

EMPTY_SET

public static final ObjectSets.EmptySet EMPTY_SET
An empty set (immutable). It is serializable and cloneable.

The class of this objects represent an abstract empty set that is a subset of a (sorted) type-specific set.

Method Detail

singleton

public static <K> ObjectSet<K> singleton(K element)
Returns a type-specific immutable set containing only the specified element. The returned set is serializable and cloneable.

Parameters:
element - the only element of the returned set.
Returns:
a type-specific immutable set containing just element.

synchronize

public static <K> ObjectSet<K> synchronize(ObjectSet<K> s)
Returns a synchronized type-specific set backed by the given type-specific set.

Parameters:
s - the set to be wrapped in a synchronized set.
Returns:
a synchronized view of the specified set.
See Also:
Collections.synchronizedSet(Set)

synchronize

public static <K> ObjectSet<K> synchronize(ObjectSet<K> s,
                                           java.lang.Object sync)
Returns a synchronized type-specific set backed by the given type-specific set, using an assigned object to synchronize.

Parameters:
s - the set to be wrapped in a synchronized set.
sync - an object that will be used to synchronize the access to the set.
Returns:
a synchronized view of the specified set.
See Also:
Collections.synchronizedSet(Set)

unmodifiable

public static <K> ObjectSet<K> unmodifiable(ObjectSet<K> s)
Returns an unmodifiable type-specific set backed by the given type-specific set.

Parameters:
s - the set to be wrapped in an unmodifiable set.
Returns:
an unmodifiable view of the specified set.
See Also:
Collections.unmodifiableSet(Set)