[commit-cp] [bugs #12255] all Java Proxy classes do not handle arguments properly

[Robert Schuster]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=12255>

                 Summary: all Java Proxy classes do not handle arguments
properly
                 Project: classpath
            Submitted by: rschuster
            Submitted on: Wed 03/09/2005 at 02:27
                Category: classpath
                Severity: 5 - Average
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
        Platform Version: None

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Details:

If I create a Proxy instance for an interface where the called methods has
arguments the actual values (instances) are missing in the argument-array of
InvocationHandler.invoke(). However the length of the array matches what I
would expect.



Here is a small test that demonstrates the problem:

import java.beans.EventHandler;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.lang.reflect.Proxy;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Method;



public class EHTest3 implements InvocationHandler {



    public static void main(String args[]) throws Exception {

        new EHTest3();

    }



    EHTest3() throws Exception {



        ActionListener al = (ActionListener)

            Proxy.newProxyInstance(ActionListener.class.getClassLoader(),

             new Class[] { ActionListener.class }, this);



        al.actionPerformed(new ActionEvent(this, 0, "GNU yourself!"));

    }



    public Object invoke(Object proxy, Method method, Object[] args) throws
Throwable {

        System.out.println("invoke: " + method);

        System.out.println("args.length: " + args.length);

        System.out.println("args[0]: " + args[0]);



        return null;

    }



}



On JamVM 1.2.5 this will say:

invoke: public abstract void
java.awt.event.ActionListener.actionPerformed(java.awt.event.A ctionEvent)

args.length: 1

args[0]: null



But args[0] should be the ActionEvent not null. 



I am using the pure Java solution for Proxy class generation .






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