net.ontopia.utils
Class WeakHashMapIndex

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.WeakHashMap
          net.ontopia.utils.WeakHashMapIndex

All Implemented Interfaces:

java.util.Map, LookupIndexIF

public class WeakHashMapIndex
extends java.util.WeakHashMap
implements LookupIndexIF

INTERNAL: A lookup index that extends WeakHashMap. It forgets what it is told using put() at the will of the garbage collector, but will, if given a fallback object, ask the fallback for values it does not have.

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

protected LookupIndexIF

fallback

Constructor Summary

WeakHashMapIndex()

WeakHashMapIndex(LookupIndexIF fallback)

WeakHashMapIndex(java.util.Map map)

WeakHashMapIndex(java.util.Map map, LookupIndexIF fallback)

Method Summary

java.lang.Object

get(java.lang.Object key)

Methods inherited from class java.util.WeakHashMap

clear, containsKey, containsValue, entrySet, isEmpty, keySet, put, putAll, remove, size, values

Methods inherited from class java.util.AbstractMap

clone, equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface net.ontopia.utils.LookupIndexIF

put, remove

Methods inherited from interface java.util.Map

equals, hashCode

Field Detail

fallback

protected LookupIndexIF fallback

Constructor Detail

WeakHashMapIndex

public WeakHashMapIndex()

WeakHashMapIndex

public WeakHashMapIndex(java.util.Map map)

WeakHashMapIndex

public WeakHashMapIndex(LookupIndexIF fallback)

WeakHashMapIndex

public WeakHashMapIndex(java.util.Map map,
                        LookupIndexIF fallback)

Method Detail

get

public java.lang.Object get(java.lang.Object key)

Specified by:

get in interface java.util.Map

Specified by:

get in interface LookupIndexIF

Overrides:

get in class java.util.WeakHashMap