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oracle.adf.share.common.rc.util
Class LoaderUtil

java.lang.Object
oracle.adf.share.common.rc.util.LoaderUtil

public class LoaderUtil

extends java.lang.Object

Nested Class Summary

static interface

LoaderUtil.NewJRLClassLoader

Constructor Summary

LoaderUtil()

Method Summary

static boolean	activateTLCache()
static void	clearTLCache() Forget the loaders presently in the cache.
static void	dumpClassLoaderHierarchy(java.lang.ClassLoader loader, java.lang.StringBuilder buf, java.lang.String prefix, java.lang.String incr) Dump the hierarchy of class loaders into the buf starting with this one.
static java.lang.ClassLoader	getAndCacheLoader(java.net.URL[] urls, java.lang.ClassLoader parent) A large percentage of the callers of the getLoader method use it to support the adding of one or more jars to the classpath of a project and for multiple components to respond to that.
static java.lang.ClassLoader	getLoader(java.net.URL[] urls, java.lang.ClassLoader parent) This is an easy way to add a collection of URL's on top of an existing loader so that the existing resources of the loader will also be visible.
static java.lang.ClassLoader	getNOPParent()
static boolean	isTLCacheActive()

Methods inherited from class java.lang.Object

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

Constructor Detail

LoaderUtil

public LoaderUtil()

Method Detail

getLoader

public static java.lang.ClassLoader getLoader(java.net.URL[] urls,
                                              java.lang.ClassLoader parent)

This is an easy way to add a collection of URL's on top of an existing loader so that the existing resources of the loader will also be visible.

Parameters:

urls - the array (0-n) of the desired locations to include

parent - the loader to become the direct parent of the returned loader which may be null to include only the URL's passed in.

Returns:

a ClassLoader that represents the input param URL locations and the parent

getAndCacheLoader

public static java.lang.ClassLoader getAndCacheLoader(java.net.URL[] urls,
                                                      java.lang.ClassLoader parent)

A large percentage of the callers of the getLoader method use it to support the adding of one or more jars to the classpath of a project and for multiple components to respond to that. Therefore, numerous identical loaders would need to be created within the same thread notify cycle.

Parameters:

urls -

parent -

Returns:

activateTLCache

public static boolean activateTLCache()

Returns:

activate the cache (isTLCacheActive will return true after this) and return whether or not the caller "owns" the cache activation. i.e. the caller is responsible for calling clearTLCachedLoaders.

clearTLCache

public static void clearTLCache()

Forget the loaders presently in the cache.

isTLCacheActive

public static boolean isTLCacheActive()

Returns:

whether or not the cache is already owned higher up the stack

dumpClassLoaderHierarchy

public static void dumpClassLoaderHierarchy(java.lang.ClassLoader loader,
                                            java.lang.StringBuilder buf,
                                            java.lang.String prefix,
                                            java.lang.String incr)

Dump the hierarchy of class loaders into the buf starting with this one.

Parameters:

loader - Use this as the beginning loader

buf - Put the output here (one loader per line)

prefix - starting space before each output line

incr - bump prefix by this much for each line

getNOPParent

public static java.lang.ClassLoader getNOPParent()

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