[CXF-4409] Proxy-based Client use Multipart getting NullPointerException

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.6
• Fix Version/s: 2.4.9, 2.5.5, 2.6.2, 2.7
• Component/s: JAX-RS

Environment

win32;x86_64;java 1.7.0_05-b05

• Estimated Complexity: Moderate
• Assignee: Sergey Beryozkin
• Reporter: Cooper
• Created: 06/Jul/12 10:48
• Updated: 28/Aug/12 17:44
• Resolved: 09/Jul/12 17:50

Description

It's all about the client, when use Proxy-based client API

Failed method signature of client restful interface as below:
@POST
@Path("/findEmployeePagingResults")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
List<Employee> findEmployeePagingResults(
@Multipart(value="condition", type=MediaType.APPLICATION_JSON) EmployeeCondition condition,
@Multipart(value="firstResult") int firstResult,
@Multipart(value="maxResults") int maxResults);
-------------------------------------------------------------------------
After try...
Success method signature is
@POST
@Path("/findEmployeePagingResults")
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
List<Employee> findEmployeePagingResults(
@Multipart(value="condition", type=MediaType.APPLICATION_JSON) EmployeeCondition condition,
@Multipart(value="firstResult", type=MediaType.TEXT_PLAIN) int firstResult,
@Multipart(value="maxResults", type=MediaType.TEXT_PLAIN) int maxResults);
---------------------------------------------------------------------------

This problem occur cuz:
MultipartProvider.java: line 369
MessageBodyWriter<T> r = mc.getProviders().getMessageBodyWriter(cls, genericType, anns, mt);

"mc.getProviders()" returns NULL when CXF try to get MessageBodyWriter for maxResults(that's the 3rd time this method called)