The exception throws clause of the javassist.util.proxy.MethodHandler.invoke method should really be a Throwable rather than an exception, otherwise the basic implementation of delegating to another object via reflection has to deal incon

public class ThingMethodHandler implements MethodHandler
{
 private IThing theThing;
 public ThingMethodHandler(IThing theThing)
 {
 this.theThing = theThing;
 }

 public Object invoke(Object self, Method thisMethod, Method proceed,
 Object[] argss)
 throws Exception
 {
 Object result = null;
 try
 {
 result = method.invoke(theThing, args);
 }
 catch (InvocationTargetException e)
 {
 Throwable t = e.getTargetException();
 // How to deal with throwing an Exception?
 }

 return result;
 }
}

The following iterface cannot be proxied correctly because of this as method1 and method2 will have to have their Throwable and Error wrapped in an Exception:

public interface IThing
{
 public void method1() throws Throwable;
 public void method2() throws Error;
}