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/*
* Copyright 2003-2008 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
public class Main {
/**
* This method will search for <code>resource</code> in different
* places. The search order is as follows:
* <ol>
* <p><li>Search for <code>resource</code> using the thread context
* class loader under Java2.
* <p><li>Try one last time with
* <code>ClassLoader.getSystemResource(resource)</code>, that is is
* using the system class loader in JDK 1.2 and virtual machine's
* built-in class loader in JDK 1.1.
* </ol>
* <p/>
*
* @param resource
* @return TODO
*/
public static URL getResource(String resource) {
ClassLoader classLoader = null;
URL url = null;
try {
classLoader = getTCL();
if (classLoader != null) {
url = classLoader.getResource(resource);
if (url != null) {
return url;
}
}
} catch (Throwable t) {
}
// Last ditch attempt: get the resource from the class path. It
// may be the case that clazz was loaded by the Extension class
// loader which the parent of the system class loader. Hence the
// code below.
return ClassLoader.getSystemResource(resource);
}
/**
* Get the Thread context class loader.
* <p/>
*
* @return the Thread context class loader
* @throws IllegalAccessException
* @throws InvocationTargetException
*/
public static ClassLoader getTCL() throws IllegalAccessException, InvocationTargetException {
return (ClassLoader)AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
return Thread.currentThread().getContextClassLoader();
}
});
}
}
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