org.testatoo.selenium.server.proxy.Proxyfier Maven / Gradle / Ivy
/**
* Copyright (C) 2008 Ovea
*
* 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.testatoo.selenium.server.proxy;
import org.testatoo.selenium.server.util.SearchingClassLoader;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public final class Proxyfier {
public static T proxify(final Object instance, final ClassLoader threadClassLoader, Class proxyInterface, final MethodHandler... methodHandlers) {
return Proxyfier.proxify(instance, threadClassLoader, new Class[]{proxyInterface}, methodHandlers);
}
public static T proxify(final Object instance, final ClassLoader threadClassLoader, Class[] interfaces, final MethodHandler... methodHandlers) {
if (interfaces == null || interfaces.length == 0) throw new IllegalArgumentException("Missing interfaces");
for (Class aClass : interfaces) {
if (!aClass.isInterface()) throw new IllegalArgumentException("Bad argument type: must be interfaces");
}
// No inspection unchecked
return (T) Proxy.newProxyInstance(SearchingClassLoader.combineLoadersOf(interfaces), interfaces, new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
for (MethodHandler methodHandler : methodHandlers) {
if (methodHandler.canHandle(method)) {
final ClassLoader backupCl = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(threadClassLoader);
try {
return methodHandler.invoke(instance, method, args);
} finally {
Thread.currentThread().setContextClassLoader(backupCl);
}
}
}
final ClassLoader backupCl = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(threadClassLoader);
final Object ret = instance.getClass().getMethod(method.getName(), method.getParameterTypes()).invoke(instance, args);
return ret == null || Void.TYPE.isInstance(ret) ? proxy : ret;
} catch (InvocationTargetException e) {
if (e.getTargetException() instanceof RuntimeException)
throw (RuntimeException) e.getTargetException();
else throw new RuntimeException(e.getTargetException().getMessage(), e.getTargetException());
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
} finally {
Thread.currentThread().setContextClassLoader(backupCl);
}
}
});
}
}