[jboss-user] [Beginner's Corner] - java.lang.ClassCastException when trying to access remote reference

[Pasquale Imbemba]

Pasquale Imbemba [https://community.jboss.org/people/pi4630] created the discussion

"java.lang.ClassCastException when trying to access remote reference"

To view the discussion, visit: https://community.jboss.org/message/714061#714061

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I'm trying to access a reference (SLSB that implements a remote interface) from a remote client.



try {
            Context ctxt = new InitialContext(p);

            ArrayList<String> listOfBeans = getBeanNames("Bean", ctxt);

            for (int i = 0; i < listOfBeans.size(); i++) {
                NamingEnumeration<Binding> b = ctxt.listBindings(listOfBeans.get(i));
                while (b.hasMore()) {
                    Binding bind = b.next();

                    if (bind.getName().contains(string.toString().subSequence(0, string.toString().length()))) {
                        
                        
                       Object ref = bind.getObject();
                        doer = (IDoSmthg) PortableRemoteObject.narrow(ref, IDoSmthg.class);
                        
                        doer = (IDoSmthg)ref;

                        return doer;
                    }
                }
            }

        } catch (NamingException nE) {
            nE.printStackTrace();
        }
        return null;
    }


According to JNDI API, getObject() retrieves the object bound to the name of the binding. 

>From the API book available online:
> 
> When you use Context.listBindings(), you get back an enumeration of Binding(in the API reference documentation). You can invoke getObject()(in the API reference documentation) on each 
> Binding to obtain the object in that binding. The result of getObject() is the same as that obtained by looking up the object by using Context.lookup()(in the API reference documentation).
> 

So I'd expect that the narrowing would have been working. But it can't cast it, I get a javax.naming.Reference cannot be cast to org.omg.CORBA.Object Exception. In Debug, I see that what getObject() returns me, is a javax.naming.Reference.

How do I get this casted correctly, so to make a call on it? I know this is not the documented way to do it, but my approach shall solve: I know the Interface, search the bean on JNDI that implements it, get the reference, make the call.

Thanks in advance!
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