[weld-dev] Abstract decorators

The specification allows for decorators to be abstract classes, but this is currently not supported in Weld (defect WELD-298). Since allowing decorator classes to be abstract is the only stated requirement, here are the general lines I think we should follow for supporting this: - abstract decorator classes can have injected fields, injected constructor parameters and concrete initializer methods, but abstract initializer methods should be forbidden (DefinitionException), or at the very least be non-portable. - abstract decorator classes cannot have abstract decorating methods (DefinitionException) WDYT? Marius