The proxy creation mechanism

ProxyFactory.java

package learnquest;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class ProxyFactory {
	public static void main(String[] args) throws Exception {
		Reversable<String> reverser = create(StringReverser.class);
		String result =  reverser.reverse("MIT");
		List list = (List) create(ArrayList.class);
		list.add(0, "MIT");
		list.add(1, "Cambridge");
		list.get(1);
	}
	public static <S,T extends S> S create(Class<T> clazz) throws Exception {
		T instance = clazz.newInstance();
		Object newProxyInstance = Proxy.newProxyInstance(
				clazz.getClassLoader(), clazz.getInterfaces(),
				new LoggingAspect(instance));
		return  (S) newProxyInstance;
	}
}

class LoggingAspect implements InvocationHandler {
	private Object target;

	public LoggingAspect(Object target) {
		this.target = target;
	}

	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		System.out.println("Method " + method.getName() + " invoked with args "
				+ Arrays.asList(args));
		Object result = method.invoke(target, args);
		System.out.println("Result of invoking "+method.getName()+" is "+result);
		return result;
	}
}