org.riotfamily.common.collection
Class WeakReferenceCollection<T>

java.lang.Object
  java.util.AbstractCollection<T>
      org.riotfamily.common.collection.WeakReferenceCollection<T>

All Implemented Interfaces:

Iterable<T>, Collection<T>

public class WeakReferenceCollection<T>
extends AbstractCollection<T>

Collection whose values are stored as weak references.

Since:

6.4

Author:

Felix Gnass [fgnass at neteye dot de]

Constructor Summary

WeakReferenceCollection()

Method Summary

boolean	add(T value) Adds a WeakReference referring to the given value to the internal collection of references.
void	clear() Clears the collection.
Iterator<T>	iterator() Returns an iterator over all non-cleared values.
void	purge() Removes all cleared references from the internal collection.
int	size() Returns the number of references.

Methods inherited from class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

equals, hashCode

Constructor Detail

WeakReferenceCollection

public WeakReferenceCollection()

Method Detail

iterator

public Iterator<T> iterator()

Returns an iterator over all non-cleared values.

Specified by:

iterator in interface Iterable<T>

Specified by:

iterator in interface Collection<T>

Specified by:

iterator in class AbstractCollection<T>

size

public int size()

Returns the number of references. The number may include references that have already been cleared. To get an exact count call purge() before.

Specified by:

size in interface Collection<T>

Specified by:

size in class AbstractCollection<T>

add

public boolean add(T value)

Adds a WeakReference referring to the given value to the internal collection of references.

Specified by:

add in interface Collection<T>

Overrides:

add in class AbstractCollection<T>

clear

public void clear()

Clears the collection.

Specified by:

clear in interface Collection<T>

Overrides:

clear in class AbstractCollection<T>

purge

public void purge()

Removes all cleared references from the internal collection.