> -----Original Message----- > From: Stephan Michels [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, January 08, 2003 3:47 PM > To: [EMAIL PROTECTED] > Subject: RE: Defining Source Interfaces > > > > > > > And as far as code cleanliness is concerned, an "instanceof" > test seems > > > more OOP to me than a isTraversable() method that tells us if > is we have > > > the right to use getParent() and getChildren(). With a separate > > > interface, these methods do not exist if they do not make sense. > > > > > This is a point were a not really agree with. If I always have to do > > instanceof tests and class casts, something is wrong with OOP then in my > > eyes. > > I'll hope not ... ;-) > > > fgrep -n "instanceof" > xml-cocoon2/src/java/org/apache/cocoon/components/LifecycleHelper.java > 212: if( component instanceof LogEnabled ) > 240: if( null != context && component instanceof Contextualizable ) > 245: if( null != componentManager && component instanceof > Composable ) > 250: if( null != roles && component instanceof RoleManageable ) > 255: if( null != logkit && component instanceof LogKitManageable ) > 260: if( null != configuration && component instanceof Configurable > ) > 265: if( null != configuration && component instanceof > Parameterizable ) > 271: if( initializeAndStart && component instanceof Initializable ) > 276: if( initializeAndStart && component instanceof Startable ) > 291: if( component instanceof Startable ) > 304: if ( component instanceof Disposable ) > And here is the definitiv answer from the avalon team:
"Remember that this is component-oriented programming (COP) and not OOP". :) Carsten --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, email: [EMAIL PROTECTED]
