/*
* Copyright 2003,2004 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.
*/
package org.mockito.cglib.proxy;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.List;
import org.mockito.cglib.core.CodeGenerationException;
/**
* This class is meant to be used as replacement for
* <code>java.lang.reflect.Proxy</code> under JDK 1.2. There are some known
* subtle differences:
* <ul>
* <li>The exceptions returned by invoking <code>getExceptionTypes</code>
* on the <code>Method</code> passed to the <code>invoke</code> method
* <b>are</b> the exact set that can be thrown without resulting in an
* <code>UndeclaredThrowableException</code> being thrown.
* <li>{@link UndeclaredThrowableException} is used instead
* of <code>java.lang.reflect.UndeclaredThrowableException</code>.
* </ul>
* <p>
* @version $Id: Proxy.java,v 1.6 2004/06/24 21:15:19 herbyderby Exp $
*/
public class Proxy implements Serializable {
protected InvocationHandler h;
private static final CallbackFilter BAD_OBJECT_METHOD_FILTER = new CallbackFilter() {
public int accept(Method method, List<Method> allMethods) {
if (method.getDeclaringClass().getName().equals("java.lang.Object")) {
String name = method.getName();
if (!(name.equals("hashCode") ||
name.equals("equals") ||
name.equals("toString"))) {
return 1;
}
}
return 0;
}
};
protected Proxy(InvocationHandler h) {
Enhancer.registerCallbacks(getClass(), new Callback[]{ h, null });
this.h = h;
}
// private for security of isProxyClass
private static class ProxyImpl extends Proxy {
protected ProxyImpl(InvocationHandler h) {
super(h);
}
}
public static InvocationHandler getInvocationHandler(Object proxy) {
if (!(proxy instanceof ProxyImpl)) {
throw new IllegalArgumentException("Object is not a proxy");
}
return ((Proxy)proxy).h;
}
public static Class getProxyClass(ClassLoader loader, Class[] interfaces) {
Enhancer e = new Enhancer();
e.setSuperclass(ProxyImpl.class);
e.setInterfaces(interfaces);
e.setCallbackTypes(new Class[]{
InvocationHandler.class,
NoOp.class,
});
e.setCallbackFilter(BAD_OBJECT_METHOD_FILTER);
e.setUseFactory(false);
return e.createClass();
}
public static boolean isProxyClass(Class cl) {
return cl.getSuperclass().equals(ProxyImpl.class);
}
public static Object newProxyInstance(ClassLoader loader, Class[] interfaces, InvocationHandler h) {
try {
Class clazz = getProxyClass(loader, interfaces);
return clazz.getConstructor(new Class[]{ InvocationHandler.class }).newInstance(new Object[]{ h });
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
throw new CodeGenerationException(e);
}
}
}