Here's the code from MyFaces...
http://svn.apache.org/repos/asf/myfaces/core/trunk/api/src/main/java/javax/faces/FactoryFinder.java
// check, if class is of expected interface type
if (!interfaceClass.isAssignableFrom(implClass))
{
throw new IllegalArgumentException("Class " + implClassName
+ " is no " + interfaceClass.getName());
}
Now let's find out why class.isAssignableFrom(class) returns false...
http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Class.html
OK it is because it doesn't think that the SeamApplicationFactoryClass passed
in is a subclass of the ApplicationFactory that was passed in.
You've been at this a couple days. This may sound nuts, but you could try to
write a class that loads the SeamApplicationFactory and the MyFaces one and
call isAssignableFrom. Put the code in a main method.
When you execute the class you'll also know exactly the classpath is set up
because you will have set it up on the command line (-cp switch).
If it works in your little harness, then you know there is a weird classloader
issue in JBoss. If it doesn't work in your harness, you'll also be able to
swap out MyFaces jars easily and see which version works.
This may seem like a lot of work, but as I said, you've been at it two days
already, and sometimes these exercises uncover... shall we say... "user
errors." You know, the kind that you'll be embarrassed to tell me :)
Good luck. I'll be out the rest of the day.
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