Actual types of generic method parameters are not recognized

Let's say I have a simple CRUD resource like this

@Produces("application/xml")
@Consumes("application/xml")
public abstract class CRUD<ENTITY_TYPE, ENTITY_ID_TYPE>
{
abstract ENTITY_TYPE find();

@GET
public ENTITY_TYPE get()

{ return find(); }

@PUT
public void put(ENTITY_TYPE entity)

{ // noop }

}

It would be nice to be able to reuse it for different entities, for instance:

@Path("/user")
public class UserCRUD extends CRUD<User, Long>
{

@Override
User find()

{ return new User("Jozef Hartinger"); }

}

The @GET method work fine however an exception occurs when a PUT request is received:

16:25:48,819 ERROR [SynchronousDispatcher] Failed executing PUT /user
org.jboss.resteasy.spi.BadRequestException: Could not find message body reader for type: ENTITY_TYPE of content type: application/xml
at org.jboss.resteasy.core.MessageBodyParameterInjector$ReaderUtilityImpl.createReaderNotFound(MessageBodyParameterInjector.java:75)
at org.jboss.resteasy.core.messagebody.ReaderUtility.doRead(ReaderUtility.java:106)
at org.jboss.resteasy.core.messagebody.ReaderUtility.doRead(ReaderUtility.java:93)
at org.jboss.resteasy.core.MessageBodyParameterInjector.inject(MessageBodyParameterInjector.java:146)
at org.jboss.resteasy.core.MethodInjectorImpl.injectArguments(MethodInjectorImpl.java:98)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:121)
at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:247)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:212)
at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:202)
at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:441)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:418)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:111)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:217)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:159)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)