Can EJBs do polymorphism?
My exact question is: I have an abstract base class called BaseClass, and a
bunch of subclasses, let's call them SubClass1, SubClass2.... All classes
have a method execute().
I used to have Java code doing this:
BaseClass bc;
bc = (BaseClass)Class.forName(subClassName).newInstance();
bc.execute();
When the parameter "className" is the qualified path of any of the
subclasses, then by calling bc.execute(), that particular subclass's
execute() method is actually run. By doing this, I don't have to know
exactly which subclass it is but run its execute() method. Can EJB do the
same thing?
The way EJB obtains a home interface doesn't seem to allow me to Cast an
object of subclass into the base class's home interface like below. I got an
java.lang.ClassCastException.
Object objref = initialContext.lookup(subClassJNDIName);
(BaseClassHome)PortableRemoteObject.narrow(objref, BaseClassHome.class);
So Basically how can I use EJB to achieve the same thing as my old code? Any
help is appreciated.
Li
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