org.semanticweb.owlapi.util

Class WeakIndexCache<K,V>

java.lang.Object

org.semanticweb.owlapi.util.WeakIndexCache<K,V>

Type Parameters:

K - key type

V - value type

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

OWLDataFactoryInternalsImpl.BuildableWeakIndexCache

public class WeakIndexCache<K,V>
extends Object
implements Serializable

A weakly linked cache - elements in the cache can be garbage collected.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Map<K,WeakReference<V>>	prefixCache

Constructor Summary

Constructors

Constructor and Description
WeakIndexCache()

Method Summary

Modifier and Type	Method and Description
V	cache(K s, V v)
void	clear() empty the cache.
boolean	contains(K k)
V	get(K k)

Methods inherited from class java.lang.Object

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

Field Detail

prefixCache

protected transient Map<K,WeakReference<V>> prefixCache

Constructor Detail

WeakIndexCache

public WeakIndexCache()

Method Detail

cache

public V cache(K s,
               V v)

Parameters:

s - the cache key

v - the cache value

Returns:

the cached value

get

public V get(K k)

Parameters:

k - the key

Returns:

the value

contains

public boolean contains(K k)

Parameters:

k - the key to check

Returns:

true if the cache contains k as a key; note that, due to the nature of this cache, by the time the method returns the key may no longer be in the map.

clear

public void clear()

empty the cache.