Mega Code Archive
Load class
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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.security.AccessController;
import java.security.PrivilegedAction;
public class Main {
/**
* If running under JDK 1.2 load the specified class using the
* <code>Thread</code> <code>contextClassLoader</code> if that
* fails try Class.forname.
* <p/>
*
* @param clazz
* @return TODO
* @throws ClassNotFoundException
*/
public static Class loadClass(String clazz) throws ClassNotFoundException {
return loadClass(clazz, true);
}
public static Class loadClass(String clazz, boolean warn) throws ClassNotFoundException {
try {
ClassLoader tcl = getTCL();
if (tcl != null) {
Class c = tcl.loadClass(clazz);
if (c != null) {
return c;
}
}
} catch (Throwable e) {
}
// we reached here because tcl was null or because of a
// security exception, or because clazz could not be loaded...
// In any case we now try one more time
return Class.forName(clazz);
}
/**
* 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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