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need help urgently,about IHelperType.createHelper()

ma shuai (1622) | asked Feb 02 '10, 3:32 a.m.
I use EMF ecore to build a custom contains two classes, one's super class was simpleItem and the other one's super class is Helper . There is a reference(to the helper) in the simpleItem class(one-many).
My issue is :when i want to create a helper there is a JVM exception was throwed.I think there are caches in the eclipse may be ,but how to resolve this issue??

code snippet:
throw an Exception at createHelper():
History history = (History) getHistoryType().createHelper();

private static IHelperType getHistoryType() {
return IHelperType.IRegistry.INSTANCE.getHelperType(

"The type org.osgi.framework.BundleContext cannot be resolved. It is indirectly referenced from required .class files java.lang.ExceptionInInitializerError"

additional: J9VMInternals->initialize(Class clazz)->getInitStatus(clazz) always return FAILED. This is the main reason.

Thanks very much.

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ma shuai (1622) | answered Feb 03 '10, 12:19 a.m.
when i change all of the UUID attribute to String ,it was fixed.But i don't know the reason.. Does anybody could tell me whether there are conficts or rules when the helper class and some UUID attributes was used together?

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