Hi Mark, I think you have to tell us what exactly you want to achieve? Do you have an example?
With the EOEnterpriseObjectClazz you have a static instance within your class but this instance is… an instance so you could put an „implements interface“ on it. Or if you just want to know if class A has a static clazz object you could create some empty interface (IHasClazzObject) as marker. jw > Am 19.11.2018 um 22:12 schrieb Morris, Mark <mark.mor...@experian.com>: > > Hallo Johann, > > Thanks for the info. I do see how I could create a default implementation of > the “static” method I’m expecting in our local EO superclass’s util inner > class, and from then on know that it will be legal to call it from any of our > subclasses. So that could work in this case. > > In general though I still don’t see how, or if it’s even possible, to do what > I was originally trying with the interface. For instance methods, I can just > test “myClass instanceof myInterface” and know whether that class implements > the methods. In ObjC, I could do the same with a protocol, but with instance > and class methods. It seems like the description of the clazz paradigm is > saying it makes that possible, but I’m just not understanding how that works. > > Thanks again. Tschüß! > Mark > > From: Johann Werner <johann.wer...@posteo.de> > Date: Monday, November 19, 2018 at 1:37 AM > To: "Morris, Mark" <mark.mor...@experian.com> > Cc: "Webobjects-dev@lists.apple.com" <Webobjects-dev@lists.apple.com> > Subject: Re: EOEnterpriseObjectClazz with interface > > Hi Mark, > > have a look at BugTracker and its dependent framework BTBusinessLogic. That > should you give some ideas. There are some more apps/frameworks in Wonder > using that pattern, just have a look at the type hierarchy of the > EOEnterpriseObjectClazz class (in Eclipse right click on the class name and > select „Open Type Hierarchy“ from the context menu). > > jw > > > Am 19.11.2018 um 06:31 schrieb Morris, Mark <mark.mor...@experian.com > <mailto:mark.mor...@experian.com>>: > > Hi all, > > I ran into a simple case where a good old ObjC protocol would have worked > fine, but Java provides only frustration. 😉 > > I wanted to require that a class that decides to implement a particular > interface should as part of that interface implement a certain static method. > No go in Java. > > The implementing classes will always be subclasses of ERXGenericRecord, and a > little searching uncovered the promising EOEnterpriseObjectsClazz approach. > Right at the top it says: > > In Java, static methods are similar to class methods in Objective-C, but one > cannot use static methods in interfaces and static methods cannot be > overridden by a subclass. Using the clazz pattern removes those limitations. > > However, I didn’t see any examples of this use, and spent a little time but > couldn’t figure it out. Are there any examples out there? > > Thanks! > Mark
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