org.apache.openjpa.lib.util.concurrent
Class ConcurrentReferenceHashSet

java.lang.Object
  org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashSet

All Implemented Interfaces:

Serializable, Iterable, Collection, Set

public class ConcurrentReferenceHashSet
extends Object
implements Set, Serializable

A concurrent set whose values may be stored as weak or soft references. If the constructor is invoked with refType set to HARD, this uses a JDK1.5 ConcurrentHashMap under the covers. Otherwise, it uses a ConcurrentReferenceHashMap.

Author:

Abe White

See Also:

Serialized Form

Field Summary

static int	HARD Hard reference marker.
static int	SOFT Soft reference marker.
static int	WEAK Weak reference marker.

Constructor Summary

ConcurrentReferenceHashSet(int refType)
Construct a set with the given reference type.

Method Summary

boolean	add(Object obj)
boolean	addAll(Collection coll)
void	clear()
boolean	contains(Object obj)
boolean	containsAll(Collection coll)
boolean	equals(Object obj)
int	hashCode()
boolean	isEmpty()
Iterator	iterator()
boolean	remove(Object obj)
boolean	removeAll(Collection coll)
boolean	retainAll(Collection coll)
int	size()
Object[]	toArray()
Object[]	toArray(Object[] arr)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

HARD

public static final int HARD

Hard reference marker.

See Also:

Constant Field Values

SOFT

public static final int SOFT

Soft reference marker.

See Also:

Constant Field Values

WEAK

public static final int WEAK

Weak reference marker.

See Also:

Constant Field Values

Constructor Detail

ConcurrentReferenceHashSet

public ConcurrentReferenceHashSet(int refType)

Construct a set with the given reference type.

Method Detail

add

public boolean add(Object obj)

Specified by:

add in interface Collection

Specified by:

add in interface Set

addAll

public boolean addAll(Collection coll)

Specified by:

addAll in interface Collection

Specified by:

addAll in interface Set

clear

public void clear()

Specified by:

clear in interface Collection

Specified by:

clear in interface Set

contains

public boolean contains(Object obj)

Specified by:

contains in interface Collection

Specified by:

contains in interface Set

containsAll

public boolean containsAll(Collection coll)

Specified by:

containsAll in interface Collection

Specified by:

containsAll in interface Set

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection

Specified by:

isEmpty in interface Set

iterator

public Iterator iterator()

Specified by:

iterator in interface Iterable

Specified by:

iterator in interface Collection

Specified by:

iterator in interface Set

remove

public boolean remove(Object obj)

Specified by:

remove in interface Collection

Specified by:

remove in interface Set

removeAll

public boolean removeAll(Collection coll)

Specified by:

removeAll in interface Collection

Specified by:

removeAll in interface Set

retainAll

public boolean retainAll(Collection coll)

Specified by:

retainAll in interface Collection

Specified by:

retainAll in interface Set

size

public int size()

Specified by:

size in interface Collection

Specified by:

size in interface Set

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

toArray

public Object[] toArray(Object[] arr)

Specified by:

toArray in interface Collection

Specified by:

toArray in interface Set

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection

Specified by:

hashCode in interface Set

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Collection

Specified by:

equals in interface Set

Overrides:

equals in class Object