IcedTea-Web
NetX

net.sourceforge.jnlp.util
Class WeakList<E>

java.lang.Object
  extended by java.util.AbstractCollection<E>
      extended by java.util.AbstractList<E>
          extended by net.sourceforge.jnlp.util.WeakList<E>
All Implemented Interfaces:
java.lang.Iterable<E>, java.util.Collection<E>, java.util.List<E>

public class WeakList<E>
extends java.util.AbstractList<E>

This list stores objects automatically using weak references. Objects are added and removed from the list as normal, but may turn to null at any point (ie, indexOf(x) followed by get(x) may return null). The weak references are only removed when the trimToSize method is called so that the indices remain constant otherwise.


Field Summary
 
Fields inherited from class java.util.AbstractList
modCount
 
Constructor Summary
WeakList()
          Create a weak random-access list.
 
Method Summary
 void add(int index, E element)
          Inserts the object at the specified position in the list.
 E get(int index)
          Returns the object at the specified index, or null if the object has been collected.
 java.util.List<E> hardList()
          Returns a list of hard references to the objects.
 E remove(int index)
          Removes the object at the specified position and returns it or returns null if it was already collected.
 E set(int index, E element)
          Sets the object at the specified position and returns the previous object at that position or null if it was already collected.
 int size()
          Returns the size of the list, including already collected objects.
 void trimToSize()
          Compacts the list by removing references to collected objects.
 
Methods inherited from class java.util.AbstractList
add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, removeRange, subList
 
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, finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface java.util.List
addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray
 

Constructor Detail

WeakList

public WeakList()
Create a weak random-access list.

Method Detail

get

public E get(int index)
Returns the object at the specified index, or null if the object has been collected.

Specified by:
get in interface java.util.List<E>
Specified by:
get in class java.util.AbstractList<E>

size

public int size()
Returns the size of the list, including already collected objects.

Specified by:
size in interface java.util.Collection<E>
Specified by:
size in interface java.util.List<E>
Specified by:
size in class java.util.AbstractCollection<E>

set

public E set(int index,
             E element)
Sets the object at the specified position and returns the previous object at that position or null if it was already collected.

Specified by:
set in interface java.util.List<E>
Overrides:
set in class java.util.AbstractList<E>

add

public void add(int index,
                E element)
Inserts the object at the specified position in the list. Automatically creates a weak reference to the object.

Specified by:
add in interface java.util.List<E>
Overrides:
add in class java.util.AbstractList<E>

remove

public E remove(int index)
Removes the object at the specified position and returns it or returns null if it was already collected.

Specified by:
remove in interface java.util.List<E>
Overrides:
remove in class java.util.AbstractList<E>

hardList

public java.util.List<E> hardList()
Returns a list of hard references to the objects. The returned list does not include the collected elements, so its indices do not necessarily correlate with those of this list.


trimToSize

public void trimToSize()
Compacts the list by removing references to collected objects.


IcedTea-Web
NetX

Submit a bug or feature