it.unimi.dsi.fastutil.objects
Class ReferenceSortedSets

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

public class ReferenceSortedSets
extends Object

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

See Also:
Collections

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

Field Detail

EMPTY_SET

public static final ReferenceSortedSets.EmptySet EMPTY_SET
An empty sorted 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> ReferenceSortedSet<K> singleton(K element)
Returns a type-specific immutable sorted set containing only the specified element. The returned sorted set is serializable and cloneable.

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

singleton

public static <K> ReferenceSortedSet<K> singleton(K element,
                                                  Comparator<? super K> comparator)
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.

Parameters:
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.

synchronize

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

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

synchronize

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

Parameters:
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.
Returns:
a synchronized view of the specified sorted set.
See Also:
Collections.synchronizedSortedSet(SortedSet)

unmodifiable

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

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