It should be an exception thrown, if administered object class, that implements more than one interface, isn't explicitly marked with adminObjectInterfaces annotation

Due to JCA 1.6 spec. page 18-16,
If the JavaBean class implements more than one Java interface, the resource
adapter provider must explicitly state the interfaces supported by the
administered object either through the adminObjectInterfaces annotation
element or through the deployment descriptor. It is an error if the resource
adapter provider does not use either of the two schemes to specify the Java types
of the interfaces supported by the administered object.