Mohan, Two different behaviors is what you wish then you need to derive from a concrete base class. Abstract classes are more likely to provide conformance to an architecture or signature template.
In Struts, folks usually inherit from the Action class to create certain behaviors. If you need to super() to a base class, you are correct, it cannot be an abstract class. I would suggest that it shouldn't be in most any case, but I don't know your architecture. It is also early and I am not sure of your terminology. A base class is a super class (standard inheritance diagrams display that way) and subsequent derivations are known as subclasses. When you want to use the code in a super class from your sub class, you user super() to call it. So your sub class (a derivation of your base class) needs to call into its super class, it is done with a super() call. The super() call is (and must be) the first statement in the subclass's overriding method. All of this seems too easy, so I am sure I have completely missed the point. Brian ----- Original Message ----- From: "Mohan Radhakrishnan" <[EMAIL PROTECTED]> To: "Struts Users Mailing List" <[EMAIL PROTECTED]> Sent: Wednesday, December 04, 2002 5:47 AM Subject: abstract class > Hi, > > If an action has two different behaviours then it is advised to use an > abstract method in the base class that the sub-action can override. > > Our base action's perform method has to pass control to a sub action's > method for the varying behavior. But if we use an abstract method then the > action cannot be instantiated. > > How is this usually done? > Thanks, > mohan > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> > > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
