Package com.thoughtworks.xstream.core.util

Class ObjectIdDictionary

java.lang.Object

com.thoughtworks.xstream.core.util.ObjectIdDictionary

public class ObjectIdDictionary
extends java.lang.Object

Store IDs against given object references.

Behaves similar to java.util.IdentityHashMap, but in JDK1.3 as well. Additionally the implementation keeps track of orphaned IDs by using a WeakReference to store the reference object.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	ObjectIdDictionary.IdWrapper
private class	ObjectIdDictionary.WeakIdWrapper
private static interface	ObjectIdDictionary.Wrapper

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Map	map
private java.lang.ref.ReferenceQueue	queue

Constructor Summary

Constructors

Constructor	Description
ObjectIdDictionary()

Method Summary

Modifier and Type	Method	Description
void	associateId(java.lang.Object obj, java.lang.Object id)
private void	cleanup()
boolean	containsId(java.lang.Object item)
java.lang.Object	lookupId(java.lang.Object obj)
void	removeId(java.lang.Object item)
int	size()

Methods inherited from class java.lang.Object

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

Field Detail

map

private final java.util.Map map

queue

private final java.lang.ref.ReferenceQueue queue

Constructor Detail

ObjectIdDictionary

public ObjectIdDictionary()

Method Detail

associateId

public void associateId(java.lang.Object obj,
                        java.lang.Object id)

lookupId

public java.lang.Object lookupId(java.lang.Object obj)

containsId

public boolean containsId(java.lang.Object item)

removeId

public void removeId(java.lang.Object item)

size

public int size()

cleanup

private void cleanup()