[UIMA-4915] NullPointerException in CasSerializerSupport when called from JsonCasSerializer and features reference the cas:NULL element

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.0SDK, 2.8.1SDK
• Fix Version/s: 2.9.0SDK, 3.0.0SDK-alpha
• Component/s: Core Java Framework

Environment

All

• Assignee: Marshall Schor
• Reporter: Philip Parker
• Created: 03/May/16 16:34
• Updated: 05/May/16 13:45
• Resolved: 04/May/16 18:24

Description

When serializing a CAS, if there are references to the NULL element (<cas:NULL xmi:id="0"/>) in the features for an annotation, a NullPointerException is thrown at line 693 of CasSerializerSupport. It appears that the ll_getTypeForCode(0) returns null, resulting in a NullPointerException when the "getName()" method is called on the return object.

The same CAS can successfully be serialized to XML using the XmlCasSerializer.