Hi Jordi,
See the following:
http://markmail.org/search/?q=list%3Anet.java.dev.jersey.users+GenericEntity+order%3Adate-backward#query
:list%3Anet.java.dev.jersey.users%20GenericEntity%20order%3Adate-
backward+page:1+mid:fp2o45igab4vg2zc+state:results
The problem is one of type erasure. The generic type information of
List<Persona> is lost as soon as an instance is created thus we need
to retain the information using GenericEntity.
An alternative to using a list is to use an array and such information
is not lost.
Hope that helps,
Paul.
[1]
https://jsr311.dev.java.net/nonav/javadoc/javax/ws/rs/core/GenericEntity.html
On Feb 23, 2009, at 12:41 PM, Jordi Domingo Borrās wrote:
> Hi!
>
> Im getting this error:
>
> GRAVE: A message body writer for Java type, class
> java.util.ArrayList, and MIME media type, application/xml, was not
> found
> 23-feb-2009 12:35:39
> com.sun.jersey.server.impl.application.WebApplicationImpl onException
> GRAVE: Internal server error
> javax.ws.rs.WebApplicationException
> at
> com
> .sun
> .jersey.spi.container.ContainerResponse.write(ContainerResponse.java:
> 240)
> at
> com
> .sun
> .jersey
> .server
> .impl
> .application
> .WebApplicationImpl._handleRequest(WebApplicationImpl.java:593)
> at
> com
> .sun
> .jersey
> .server
> .impl
> .application
> .WebApplicationImpl.handleRequest(WebApplicationImpl.java:514)
> at
> com
> .sun
> .jersey
> .server
> .impl
> .application
> .WebApplicationImpl.handleRequest(WebApplicationImpl.java:505)
> at
> com
> .sun
> .jersey
> .spi
> .container.servlet.ServletContainer.service(ServletContainer.java:359)
> 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
> .apache
> .catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
> 233)
> at
> org
> .apache
> .catalina.core.StandardContextValve.invoke(StandardContextValve.java:
> 191)
> at
> org
> .apache
> .catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org
> .apache
> .catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org
> .apache
> .catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
> 109)
> at
> org
> .apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
> 286)
> at
> org
> .apache.coyote.http11.Http11Processor.process(Http11Processor.java:
> 845)
> at org.apache.coyote.http11.Http11Protocol
> $Http11ConnectionHandler.process(Http11Protocol.java:583)
> at org.apache.tomcat.util.net.JIoEndpoint
> $Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Thread.java:619)
>
> Trying to do :
>
>
> @GET
> @Produces({"application/json","application/xml"})
> public Response getPersones() {
> ResponseBuilder rb = Response.ok().entity(listPersones());
> return rb.build();
> }
>
> The method listPersones() just returns an List<Persona>
>
> If i return a List<Persona>, just the same without wrapping it into
> a response, everything goes fine:
>
> @GET
> @Produces({"application/json","application/xml"})
> public List<Persona> getPersones() {
> return listPersones();
> }
>
> I dont know if its a bug or Im doing something wrong.. I need your
> help :)
>
> Thanks!
>
> Jordi
>