com.massa.util.classloader

Class ClassLoaderResolver

java.lang.Object

com.massa.util.classloader.ClassLoaderResolver

public final class ClassLoaderResolver
extends Object

This non-instantiable non-subclassable class acts as the global point for choosing a ClassLoader for dynamic class/resource loading at any point in an application.

Author:

(C) Vlad Roubtsov, 2003

See Also:

ResourceLoader, IClassLoadStrategy, DefaultClassLoadStrategy

Method Summary

Modifier and Type	Method and Description
static ClassLoader	getClassLoader() This method selects the "best" classloader instance to be used for class/resource loading by whoever calls this method.
(package private) static ClassLoader	getClassLoader(int callerOffset) A package-private version of getClassLoader() with adjustable caller offset (useful for embedding this method in other library classes in this package).
static IClassLoadStrategy	getStrategy() Gets the current classloader selection strategy setting.
static IClassLoadStrategy	setStrategy(IClassLoadStrategy strategy) Sets the classloader selection strategy to be used by subsequent calls to getClassLoader().

Methods inherited from class java.lang.Object

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

Method Detail

getClassLoader

public static ClassLoader getClassLoader()

This method selects the "best" classloader instance to be used for class/resource loading by whoever calls this method. The decision typically involves choosing between the caller's current, thread context, system, and other classloaders in the JVM and is made by the IClassLoadStrategy instance established by the last call to setStrategy(com.massa.util.classloader.IClassLoadStrategy).

Returns:

classloader to be used by the caller. Can't be null.

getStrategy

public static IClassLoadStrategy getStrategy()

Gets the current classloader selection strategy setting.

setStrategy

public static IClassLoadStrategy setStrategy(IClassLoadStrategy strategy)

Sets the classloader selection strategy to be used by subsequent calls to getClassLoader(). An instance of DefaultClassLoadStrategy is in effect if this method is never called.

Parameters:

strategy - [may not be null]

Returns:

previous setting

getClassLoader

static ClassLoader getClassLoader(int callerOffset)

A package-private version of getClassLoader() with adjustable caller offset (useful for embedding this method in other library classes in this package).

Parameters:

callerOffset - extra call context depth offset to pass into getCallerClass().