Java Answers Forum - Dynamic Casting || Dynamic Invocation of a method of a default class

Articles |
News |
Weblogs |
Books |
Forums

Artima Forums | Articles | Weblogs | Java Answers | News

Sponsored Link •

Java Answers Forum
Dynamic Casting || Dynamic Invocation of a method of a default class

0 replies on 1 page.

Welcome Guest
Sign In

Back to Topic List

Reply to this Topic

Search Forum

Threaded View


Previous Topic		Next Topic

Flat View: This topic has 0 replies on 1 page

Saisantosh Polavarapu

Posts: 2
Nickname: sai
Registered: Jul, 2002

Dynamic Casting || Dynamic Invocation of a method of a default class

Posted: Jul 17, 2002 12:47 PM

Hi:

I am trying to invoke a method dynamically and here is the Error I am stuck with:
"object is not an instance of declaring class" at IllegalArgumentException block

Here is the detail information:

I need to create the instance and reference of component and invoke a method on that

Interface and helper class names would be getting dynamically.

Say I have,
public interface:ABC_Interface
public abstract class: ABC_HelperClass

In actual scenario if I would have the known classes then my code will look like

ABC_Interface abcInfer =ABC_HelperClass.invokeMethod();
abcInfer.actuallMethodCall();

The method in abstract class ABC_HelperClass that is invokeMethod() returns the object of default class(say xyzClass which implements ABC_Interface)

I need to dynamically fetch the class name (here it is ABC_HelperClass) and invoke a method on it (which I could able to do it using Java reflection): this returns the object of a default class say (xyzClass which is not public and implements ABC_Interface) so that now I get the reference of ABC_Interface object and now I have to call a method on this object.

Since I am using java reflection I am getting errors like IllegalArgumentException and "object is not an instance of declaring class"

Look to your response

Previous Topic

Next Topic


	Web Artima.com