[Jboss-dev-forums] [Design of AOP on JBoss (Aspects/JBoss)] - Re: null returned

[<kab...@jb...>]

I am sure we have tests in our testsuite for this. In any case I gave it a go, and it worked for me.


  | public class ConstructorInterceptor implements Interceptor
  | {
  |    public String getName() { return "ConstructorInterceptor"; }
  | 
  |    public Object invoke(Invocation invocation) throws Throwable
  |    {
  |       try
  |       {
  |          System.out.println("<<< Doing it");
  |          Object o = invocation.invokeNext();
  |          System.out.println("Got o " + (o != null));
  |          return o;
  |       }
  |       finally
  |       {
  |          System.out.println(">>> Leaving ConstructorInterceptor");
  |       }
  |    }
  | }
  | 



  | <aop>
  | 
  |    <bind pointcut="call(* java.lang.Class->newInstance(..))">
  |        <interceptor class="ConstructorInterceptor"/>
  |    </bind>
  | 
  | </aop>
  | 



  | public class Driver
  | {
  |    public static void main(String[] args) throws Exception
  |    {
  |       Class clazz = POJO.class;
  |       System.out.println("--- new POJO(); ---");
  |       POJO pojo = (POJO)clazz.newInstance();
  |       System.out.println("Got pojo " + (pojo != null));
  |    }
  | }
  | 




  | <?xml version="1.0" encoding="UTF-8"?>
  | <aop>
  | 
  |    <bind pointcut="call(* java.lang.Class->newInstance(..))">
  |        <interceptor class="ConstructorInterceptor"/>
  |    </bind>
  | 
  | </aop>
  | 


Output:

  | 
  |      [java] --- new POJO(); ---
  |      [java] <<< Doing it
  |      [java] empty constructor
  |      [java] Got o true
  |      [java] >>> Leaving ConstructorInterceptor
  |      [java] Got pojo true
  | 

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