org.jboss.util.collection
Class WeakTypeCache<T>

java.lang.Object
  org.jboss.util.collection.WeakTypeCache<T>

Type Parameters:

T - the cached type

public abstract class WeakTypeCache<T>
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:

Scott.Stark@jboss.org, Adrian Brock

Constructor Summary

WeakTypeCache()

Method Summary

protected abstract void	generate(Class<?> clazz, T result) Fill in the result
protected abstract void	generate(ParameterizedType type, T result) Fill in the result
T	get(String name, ClassLoader cl) Get the information for a class
T	get(Type type) Get the information for a type
protected T	getClass(Class<?> clazz) Get the information for a class
protected Map<String,T>	getClassLoaderCache(ClassLoader cl) Get the cache for the classloader
protected T	getGenericArrayType(GenericArrayType type) Get the information for an array type
protected T	getParameterizedType(ParameterizedType type) Get the information for a parameterized type
protected <D extends GenericDeclaration> T	getTypeVariable(TypeVariable<D> type) Get the information for a type variable
protected T	getWildcardType(WildcardType type) Get the information for a wildcard type
protected abstract T	instantiate(Class<?> clazz) Instantiate for a class
protected abstract T	instantiate(ParameterizedType type) Instantiate for a parameterized type
protected T	peek(Class<?> clazz) Peek into the cache
protected T	peek(ParameterizedType type) Peek into the cache
protected void	put(Class<?> clazz, T result) Put a result into the cache
protected void	put(ParameterizedType type, T result) Put a result into the cache

Methods inherited from class java.lang.Object

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

Constructor Detail

WeakTypeCache

public WeakTypeCache()

Method Detail

get

public T get(Type type)

Get the information for a type

Parameters:

type - the type

Returns:

the info

get

public T 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 T instantiate(Class<?> clazz)

Instantiate for a class

Parameters:

clazz - the class

Returns:

the result

generate

protected abstract void generate(Class<?> clazz,
                                 T result)

Fill in the result

Parameters:

clazz - the class

result - the result

instantiate

protected abstract T instantiate(ParameterizedType type)

Instantiate for a parameterized type

Parameters:

type - the parameterized type

Returns:

the result

generate

protected abstract void generate(ParameterizedType type,
                                 T result)

Fill in the result

Parameters:

type - the parameterized type

result - the result

getParameterizedType

protected T getParameterizedType(ParameterizedType type)

Get the information for a parameterized type

Parameters:

type - the parameterized type

Returns:

the info

getWildcardType

protected T getWildcardType(WildcardType type)

Get the information for a wildcard type

Parameters:

type - the paremeterized type

Returns:

the info

getTypeVariable

protected <D extends GenericDeclaration> T getTypeVariable(TypeVariable<D> type)

Get the information for a type variable

Type Parameters:

D - the declaration

Parameters:

type - the type variable

Returns:

the info

getGenericArrayType

protected T getGenericArrayType(GenericArrayType type)

Get the information for an array type

Parameters:

type - the array type

Returns:

the info

peek

protected T peek(ParameterizedType type)

Peek into the cache

Parameters:

type - the type

Returns:

the value

put

protected void put(ParameterizedType type,
                   T result)

Put a result into the cache

Parameters:

type - the type

result - the value

getClass

protected T getClass(Class<?> clazz)

Get the information for a class

Parameters:

clazz - the class

Returns:

the info

peek

protected T peek(Class<?> clazz)

Peek into the cache

Parameters:

clazz - the class

Returns:

the value

put

protected void put(Class<?> clazz,
                   T result)

Put a result into the cache

Parameters:

clazz - the class

result - the value

getClassLoaderCache

protected Map<String,T> getClassLoaderCache(ClassLoader cl)

Get the cache for the classloader

Parameters:

cl - the classloader

Returns:

the map