BUG: Instead of contained entities, container entities are serialized via AbstractEMFMessageBodyReaderWriter when returning responses from REST API methods
When returning responses from REST API methods, org.gecko.emf.osgi.rest.jaxrs.AbstractEMFMessageBodyReaderWriter
mistakenly serializes the container entity when the contained entity should be serialized.
Currently, a workaround is to copy objects / lists via EcoreUtil.copy
before returning them. But AbstractEMFMessageBodyReaderWriter
itself should serialize the proper entity.