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

Fields

Modifier and Type	Field and Description
static int	HARD Hard reference marker.
static int	SOFT Soft reference marker.
static int	WEAK Weak reference marker.

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
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