org.jboss.util
Class WeakClassCache

java.lang.Object
  org.jboss.util.WeakClassCache

public abstract class WeakClassCache
extends Object

A weak class cache that instantiates does not a hold a strong reference to either the classloader or class.

It creates the class specific data in two stages to avoid recursion.

instantiate - creates the data
generate - fills in the details

Author:

Adrian Brock

Field Summary

protected Map

cache The cache

Constructor Summary

WeakClassCache()

Method Summary

protected abstract void	generate(Class clazz, Object result) Fill in the result
Object	get(Class clazz) Get the information for a class
Object	get(String name, ClassLoader cl) Get the information for a class
protected Map	getClassLoaderCache(ClassLoader cl) Get the cache for the classloader
protected abstract Object	instantiate(Class clazz) Instantiate for a class

Methods inherited from class java.lang.Object

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

Field Detail

cache

protected Map cache

The cache

Constructor Detail

WeakClassCache

public WeakClassCache()

Method Detail

get

public Object get(Class clazz)

Get the information for a class

Parameters:

clazz - the class

Returns:

the info

get

public Object get(String name,
                  ClassLoader cl)
           throws ClassNotFoundException

Get the information for a class

Parameters:

name - the name

cl - the classloader

Returns:

the info

Throws:

ClassNotFoundException - when the class cannot be found

instantiate

protected abstract Object instantiate(Class clazz)

Instantiate for a class

Parameters:

clazz - the class

Returns:

the result

generate

protected abstract void generate(Class clazz,
                                 Object result)

Fill in the result

Parameters:

clazz - the class

the - result

getClassLoaderCache

protected Map getClassLoaderCache(ClassLoader cl)

Get the cache for the classloader

Parameters:

cl - the classloader

Returns:

the map