Package org.apache.wicket.util.collections

Class ClassMetaCache<T>

java.lang.Object

org.apache.wicket.util.collections.ClassMetaCache<T>

Type Parameters:

T - type of objects stored in cache

public class ClassMetaCache<T>
extends Object

This class wraps a WeakHashMap that holds one ConcurrentHashMap per ClassLoader. In the rare event of a previously unmapped ClassLoader, the WeakHashMap is replaced by a new one. This avoids any synchronization overhead, much like a CopyOnWriteArrayList

Constructor Summary

Constructors

Constructor	Description
ClassMetaCache()

Method Summary

Modifier and Type	Method	Description
T	get(Class<?> key)	Gets value from cache or returns null if not in cache
T	put(Class<?> key, T value)	Puts value into cache

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassMetaCache

public ClassMetaCache()

Method Detail

put

public T put(Class<?> key,
             T value)

Puts value into cache

Parameters:

key - the class that will be used as the value's key

value - the value that should be stored in cache

Returns:

value previously stored in cache for this key, or null if none

get

public T get(Class<?> key)

Gets value from cache or returns null if not in cache

Parameters:

key - the class that is the key for the value

Returns:

value stored in cache or null if none