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  Determine 'All Known Implementing Classes'  (Read 1624 times)
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Offline zero

Junior Devvie

« Posted 2006-04-09 08:00:31 »

You probably know the part of the Java Api Doc:

All Known Implementing Classes: ..

Now, I was wondering if its possible to query all classes implementing an interface or marked with a specified annotation type at runtime?

Btw., I took a look at the Class object but did find the methods I was looking for..
Offline bjgil2

Senior Newbie

That's it Mr. Giraffe, get all the marmalade

« Reply #1 - Posted 2006-04-09 09:45:11 »

blahblahblah's code in this thread will allow you to find all classes implementing an interface

Offline zero

Junior Devvie

« Reply #2 - Posted 2006-04-09 10:28:29 »

thanks for the reply,

I guess I have to wait until is online again..
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Offline zero

Junior Devvie

« Reply #3 - Posted 2006-04-09 14:02:34 »

the server is up again, but unfortunately it doesn't work:

Class[] list = new ClassLocater().getSubclassesOf(java.util.EventListener.class);
for(Class c : list)

there are no classes and interfaces listed from the java.awt.event package.  Sad

any other ideas or is this just not possible?
Offline woogley
« Reply #4 - Posted 2006-04-09 16:56:28 »

you might have a look at the Doclet API, in particular, the RootDoc class. Of course Sun will say not to use com.sun.* packages so you might be interested in opening up in your SDK folder and see how the Doclet API is doing it..
Offline zero

Junior Devvie

« Reply #5 - Posted 2006-04-09 17:17:09 »

thanks for the answer woogley.

unfortunately, RootDoc is an interface and the two classes from the Doclet API (Doclet + LanguageVersion) seem to be dummy implementations. -> seems not to be helpful..  Undecided
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