org.apache.jdo.util
Class WeakValueHashMap.WeakValue
java.lang.Object
java.lang.ref.Reference
java.lang.ref.WeakReference
org.apache.jdo.util.WeakValueHashMap.WeakValue
- Enclosing class:
- WeakValueHashMap
- private static class WeakValueHashMap.WeakValue
- extends java.lang.ref.WeakReference
We need this special class to keep the backward reference from
the value to the key, so that we are able to remove the key if
the value is garbage collected.
Nested classes inherited from class java.lang.ref.Reference |
|
Field Summary |
private java.lang.Object |
key
It's the same as the key in the map. |
Fields inherited from class java.lang.ref.Reference |
|
Method Summary |
private static WeakValueHashMap.WeakValue |
create(java.lang.Object value)
Creates a new weak reference without adding it to a
ReferenceQueue. |
private static WeakValueHashMap.WeakValue |
create(java.lang.Object key,
java.lang.Object value,
java.lang.ref.ReferenceQueue queue)
Creates a new weak reference and adds it to the given queue. |
boolean |
equals(java.lang.Object obj)
A WeakValue is equal to another WeakValue iff they both refer
to objects that are, in turn, equal according to their own
equals methods. |
int |
hashCode()
|
Methods inherited from class java.lang.ref.Reference |
clear, enqueue, get, isEnqueued |
Methods inherited from class java.lang.Object |
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
key
private java.lang.Object key
- It's the same as the key in the map. We need the key to remove
the value if it is garbage collected.
WeakValueHashMap.WeakValue
private WeakValueHashMap.WeakValue(java.lang.Object value)
WeakValueHashMap.WeakValue
private WeakValueHashMap.WeakValue(java.lang.Object key,
java.lang.Object value,
java.lang.ref.ReferenceQueue queue)
create
private static WeakValueHashMap.WeakValue create(java.lang.Object value)
- Creates a new weak reference without adding it to a
ReferenceQueue.
create
private static WeakValueHashMap.WeakValue create(java.lang.Object key,
java.lang.Object value,
java.lang.ref.ReferenceQueue queue)
- Creates a new weak reference and adds it to the given queue.
equals
public boolean equals(java.lang.Object obj)
- A WeakValue is equal to another WeakValue iff they both refer
to objects that are, in turn, equal according to their own
equals methods.
hashCode
public int hashCode()