org.rhq.bindings.util

Class ClassPoolFactory

java.lang.Object

org.rhq.bindings.util.ClassPoolFactory

public class ClassPoolFactory
extends Object

This class is used to create Javassist's classpools usable in RHQ on both client and server side. This only exists to centralize the initialization code for the pools.

This is to ensure that Javassist can locate the classes in various classloading "schemes" - the traditional application classloader used in the CLI client and the JBoss Modules classloading used on the server.

Author:

Lukas Krejci

Method Summary

Methods

Modifier and Type	Method and Description
static javassist.ClassPool	getClassPool(ClassLoader classLoader) Returns a class pool that uses the provided class loader as its source for the "class path".
static javassist.ClassPool	getClassPoolForCurrentContextClassLoader() Unlike the ClassPool.getDefault() method that only ever returns a single instance of the pool, this factory may return different instances depending on the context classloader of the current thread.

Methods inherited from class java.lang.Object

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

Method Detail

getClassPool

public static javassist.ClassPool getClassPool(ClassLoader classLoader)

Returns a class pool that uses the provided class loader as its source for the "class path". Each class loader will have exactly one class pool and the class pool will use the class loader to define the classes. This is to ensure that there exists a consistent correspondence between the classes cached by the class pool with the ones defined by the class loader and no linkage error can occur due to the possible attempts to define a single class multiple times using a single class loader.

If the provided class loader is null, a default instance is used.

Parameters:

classLoader - the class loader to return the class pool for

Returns:

getClassPoolForCurrentContextClassLoader

public static javassist.ClassPool getClassPoolForCurrentContextClassLoader()

Unlike the ClassPool.getDefault() method that only ever returns a single instance of the pool, this factory may return different instances depending on the context classloader of the current thread. The returned class pool is using the current thread context class loader to locate the classes but also is using the default resource lookup of the Class class, in addition to just the system class path as detected by Javassist (which is the only one used in the class pool returned by ClassPool.getDefault()).

Returns:

the class pool instance for the current context classloader

See Also:

getClassPool(ClassLoader)