classUtils.javassist.sample.duplicate
Class DuplicatedObject

java.lang.Object
  classUtils.javassist.reflect.Metaobject
      classUtils.javassist.sample.duplicate.DuplicatedObject

All Implemented Interfaces:

java.io.Serializable

public class DuplicatedObject
extends Metaobject

See Also:

Serialized Form

Constructor Summary

DuplicatedObject(java.lang.Object self, java.lang.Object[] args)

Method Summary

java.lang.Object

trapMethodcall(int identifier, java.lang.Object[] args) Is invoked when base-level method invocation is intercepted.

Methods inherited from class classUtils.javassist.reflect.Metaobject

getClassMetaobject, getMethodName, getObject, getParameterTypes, getReturnType, setObject, trapFieldRead, trapFieldWrite

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DuplicatedObject

public DuplicatedObject(java.lang.Object self,
                        java.lang.Object[] args)

Method Detail

trapMethodcall

public java.lang.Object trapMethodcall(int identifier,
                                       java.lang.Object[] args)
                                throws java.lang.Throwable

Description copied from class: Metaobject

Is invoked when base-level method invocation is intercepted. This method simply executes the intercepted method invocation with the original parameters and returns the resulting value.

Every subclass of this class should redefine this method.

Note: this method is not invoked if the base-level method is invoked by a constructor in the super class. For example,

abstract class A {
   abstract void initialize();
   A() {
       initialize();    // not intercepted
   }
 }

 class B extends A {
   void initialize() { System.out.println("initialize()"); }
   B() {
       super();
       initialize();    // intercepted
   }
 }

if an instance of B is created, the invocation of initialize() in B is intercepted only once. The first invocation by the constructor in A is not intercepted. This is because the link between a base-level object and a metaobject is not created until the execution of a constructor of the super class finishes.

Overrides:

trapMethodcall in class Metaobject

Throws:

java.lang.Throwable