[CXF-5994] java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.reflect.TypeVariable

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.11
• Fix Version/s: 3.1.9
• Component/s: JAXB Databinding

Environment

Wildfly 8.1.0.Final, JDK: 1.8.0_20-b26 64bit

• Estimated Complexity: Advanced
• Assignee: Unassigned
• Reporter: Yannick Loth
• Created: 09/Sep/14 14:18
• Updated: 31/Mar/17 19:38
• Resolved: 23/Mar/17 17:27

Description

java.lang.ClassCastException: sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to java.lang.reflect.TypeVariable
at org.apache.cxf.jaxb.JAXBContextInitializer.addType(JAXBContextInitializer.java:251) [cxf-rt-databinding-jaxb-2.7.11.jar:2.7.11]

Happens when the type is a GenericArrayType: then the code assumes that the component in the array type is either a class or a TypeVariable, and the cast into TypeVariable fails.
During debug sessions, I can see that the actual type is an array of a subtype of ParameterizedType, and obviously the code does not permit this.

The data types were generated with Maven and cxf-codegen-plugin. The XSD is from Microsoft Exchange EWS (Exchange Web Service, 2006). The problematic type is: com.microsoft.schemas.exchange.services._2006.messages.ResponseMessageType[]

This is blocking as any webservice which uses the data types of EWS fails if called with the standard JAXWS stack in Wildfly 8.1.0.Final.

For the fix: maybe copying lines 234 to 243 into line 250 may be almost enough (simply add an else-if for ParameterizedType arrays as above, but adapt a little for arrays):

else if (cls instanceof ParameterizedType) {
final ParameterizedType parameterizedType = (ParameterizedType)cls;
addType(parameterizedType.getRawType());
if (!parameterizedType.getRawType().equals(Enum.class)) {
for (Type t2 : parameterizedType.getActualTypeArguments()) {
if (shouldTypeBeAdded(t2, parameterizedType))

{ addType(t2); }

} }

Thanks