Major Description
This issue is similar to CXF-7307.
The http request:
GET /demo-provider/v1.0/users/beanparam?a= HTTP/1.1
HOST: localhost:8080
accept: application/json
content-type: application/json
The resource method returns null:
public String beanParam(@QueryParam("a") MyEnum a)
javax.ws.rs.ClientErrorException: HTTP 404 Not Found
{{
2017-07-27 14:51:34.325 [Default Executor-thread-117] DEBUG d.k.i.a.e.h.WebApplicationExceptionHandler toResponse[30]: Build webapplication error response [exceptionMessage=HTTP 404 Not Found]
javax.ws.rs.WebApplicationException: HTTP 404 Not Found
at org.apache.cxf.jaxrs.utils.InjectionUtils.evaluateFactoryMethods(InjectionUtils.java:546)
at org.apache.cxf.jaxrs.utils.InjectionUtils.handleParameter(InjectionUtils.java:457)
at org.apache.cxf.jaxrs.utils.InjectionUtils.injectIntoCollectionOrArray(InjectionUtils.java:931)
at org.apache.cxf.jaxrs.utils.InjectionUtils.createParameterObject(InjectionUtils.java:1003)
at org.apache.cxf.jaxrs.utils.JAXRSUtils.readQueryString(JAXRSUtils.java:1192)
at org.apache.cxf.jaxrs.utils.JAXRSUtils.createHttpParameterValue(JAXRSUtils.java:868)
at org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameter(JAXRSUtils.java:838)
at org.apache.cxf.jaxrs.utils.JAXRSUtils.processParameters(JAXRSUtils.java:789)
at org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.processRequest(JAXRSInInterceptor.java:212)
at org.apache.cxf.jaxrs.interceptor.JAXRSInInterceptor.handleMessage(JAXRSInInterceptor.java:77)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:308)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:121)
at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:262)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:234)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:208)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:160)
at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:180)
at de.CXFServlet.invoke(CXFServlet.java:71)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:299)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doGet(AbstractHTTPServlet.java:223)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:274)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1290)
...
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: No enum constant de.MyEnum.
at java.lang.Enum.valueOf(Enum.java:236)
at de.MyEnum.valueOf(EndpointType.java:1)
at sun.reflect.GeneratedMethodAccessor1111.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.cxf.jaxrs.utils.InjectionUtils.evaluateFactoryMethod(InjectionUtils.java:560)
at org.apache.cxf.jaxrs.utils.InjectionUtils.evaluateFactoryMethods(InjectionUtils.java:527)
... 51 common frames omitted
}}
org.apache.cxf.jaxrs.utils.InjectionUtils.handleParameter(String, boolean, Class<T>, Type, Annotation[], ParameterType, Message)
-> calls org.apache.cxf.jaxrs.utils.InjectionUtils.evaluateFactoryMethods(String, ParameterType, Object, Class<?>, String[])
using "fromString", "fromValue", "valueOf"
-> evaluateFactoryMethods continues with next method, if the first method returns null
-> as "fromString" returns "null" now (it is implemented), "fromValue" does not exists, it calls "valueOf" and that one cannot handle null, empty or blank Strings
-> and even, if evaluateFactoryMethods would return null, the handleParameter contains this check, that forbids null:
— SNIP —
if (result == null)
— SNAP —