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oracle.wsm.policy.util
Class Loader

java.lang.Object
oracle.wsm.policy.util.Loader

public class Loader

extends Object

Utility class for loading resource or classes.

Resources/classes are retrieved from class loaders in the following order:

1. the calling thread context's class loader - obtained using Thread.currentThread().getContextClassLoader()
2. this classes class loader (oracle.wsm.core in OC4J environments) - obtained using Loader.class.getClassLoader()
3. the extension class loader (oracle.wsm.extension) - obtained using ClassLoaderUtilities.findClassLoader(EXTENSION_LIBRARY, null, null)
4. the system class loader - obtained using ClassLoader.getSystemClassLoader()

Field Summary

static String

EXTENSION_LIBRARY Shared library from which extension resources or classes will be loaded.

Constructor Summary

Loader()

Method Summary

static URL	getResource(String resource) Get URL for resource from available loaders.
static URL	getResource(String resource, boolean useSystemLoader) Get URL for resource from available loaders.
static Enumeration<URL>	getResources(String resource) Get list of URL's for resource from available loaders.
static Enumeration<URL>	getResources(String resource, boolean useSystemLoader) Get list of URL's for resource from available loaders.
static Class	loadClass(String className) Load a class from available loaders.

Methods inherited from class java.lang.Object

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

Field Detail

EXTENSION_LIBRARY

public static final String EXTENSION_LIBRARY

Shared library from which extension resources or classes will be loaded.

See Also:

Constant Field Values

Constructor Detail

Loader

public Loader()

Method Detail

getResource

public static URL getResource(String resource)

Get URL for resource from available loaders.

Parameters:

resource - resource to get

Returns:

URL for resource, null if not found

getResource

public static URL getResource(String resource,
                              boolean useSystemLoader)

Get URL for resource from available loaders.

Parameters:

resource - resource to get

useSystemLoader - whether to include system loader in search

Returns:

URL for resource, null if not found

getResources

public static Enumeration<URL> getResources(String resource)

Get list of URL's for resource from available loaders.

Parameters:

resource - resource to get

Returns:

enumeration of resource URL's

getResources

public static Enumeration<URL> getResources(String resource,
                                            boolean useSystemLoader)

Get list of URL's for resource from available loaders.

Parameters:

resource - resource to get

useSystemLoader - whether to include system loader in search

Returns:

enumeration of resource URL's

loadClass

public static Class loadClass(String className)
                       throws ClassNotFoundException

Load a class from available loaders.

Parameters:

className - class to load

Returns:

class loaded

Throws:

ClassNotFoundException

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