i have a test class named prova;
i want run class prova and intercept methos invocation,field reading,writing,and object instantiation.
I write this the follow code:

try{
 javassit.reflect.Loader cl = new javassit.reflect.Loader();
 cl.makeReflective("prova","VerboseMO","javassist.reflect.ClassMetaobject");
cl.run("prova",args);
 }
cath(Throeable e){}

and the class VerboseMO:

class VerboseMO extends Metaobject
{
 public VerboseMO(Object base,Object args[])
 {
 super(base,args);
 System.out.println("Reflective Output: New instance of:"+base.getClass().getName()+"created");
 }

 public Object trapFieldRead(String name)
 {

 }

 public Object trapMethodcall(int id, Object[] args)
 {

 }

}

this code work ,but do not know how i can intercept method call and feild call:read or write.

Can anyone help me?