org.apache.openjpa.lib.util.concurrent
Class ConcurrentReferenceHashSet<E>

java.lang.Object
  org.apache.openjpa.lib.util.concurrent.ConcurrentReferenceHashSet<E>

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, Set<E>

public class ConcurrentReferenceHashSet<E>
extends Object
implements Set<E>, 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(E obj)
boolean	addAll(Collection<? extends E> coll)
void	clear()
boolean	contains(Object obj)
boolean	containsAll(Collection<?> coll)
boolean	equals(Object obj)
int	hashCode()
boolean	isEmpty()
Iterator<E>	iterator()
boolean	remove(Object obj)
boolean	removeAll(Collection<?> coll)
boolean	retainAll(Collection<?> coll)
int	size()
Object[]	toArray()
<T> T[]	toArray(T[] 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(E obj)

Specified by:

add in interface Collection<E>

Specified by:

add in interface Set<E>

addAll

public boolean addAll(Collection<? extends E> coll)

Specified by:

addAll in interface Collection<E>

Specified by:

addAll in interface Set<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Specified by:

clear in interface Set<E>

contains

public boolean contains(Object obj)

Specified by:

contains in interface Collection<E>

Specified by:

contains in interface Set<E>

containsAll

public boolean containsAll(Collection<?> coll)

Specified by:

containsAll in interface Collection<E>

Specified by:

containsAll in interface Set<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Collection<E>

Specified by:

isEmpty in interface Set<E>

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Set<E>

remove

public boolean remove(Object obj)

Specified by:

remove in interface Collection<E>

Specified by:

remove in interface Set<E>

removeAll

public boolean removeAll(Collection<?> coll)

Specified by:

removeAll in interface Collection<E>

Specified by:

removeAll in interface Set<E>

retainAll

public boolean retainAll(Collection<?> coll)

Specified by:

retainAll in interface Collection<E>

Specified by:

retainAll in interface Set<E>

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in interface Set<E>

toArray

public Object[] toArray()

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

toArray

public <T> T[] toArray(T[] arr)

Specified by:

toArray in interface Collection<E>

Specified by:

toArray in interface Set<E>

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<E>

Specified by:

hashCode in interface Set<E>

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface Collection<E>

Specified by:

equals in interface Set<E>

Overrides:

equals in class Object