I am trying to use BaseX JAX-RX embedded, e.g. start it from my desktop application when the user clicks "Open App" in the system tray menu. The server starts up fine, but when I try to send it a query the Jersey server generates an error, see the log below after the user clicks "Open App".

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7-jul-2011 16:25:01 com.sun.jersey.api.core.PackagesResourceConfig init

INFO: Scanning for root resource and provider classes in the packages:

  org.jaxrx.resource

7-jul-2011 16:25:02 com.sun.jersey.api.core.ScanningResourceConfig logClasses

INFO: Root resource classes found:

  class org.jaxrx.resource.XMLResource

  class org.jaxrx.resource.JaxRxResource

7-jul-2011 16:25:02 com.sun.jersey.api.core.ScanningResourceConfig init

INFO: No provider classes found.

7-jul-2011 16:25:02 com.sun.jersey.server.impl.application.WebApplicationImpl _initiate

INFO: Initiating Jersey application, version 'Jersey: 1.6 03/25/2011 01:14 PM'

7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse write

SEVERE: A message body writer for Java class org.basex.api.jaxrx.BXJaxRx$2, and Java type class org.basex.api.jaxrx.BXJaxRx$2, and MIME media type text/xml; omit-xml-declaration=no was not found

7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse write

SEVERE: The registered message body writers compatible with the MIME media type are:

*/* ->

  com.sun.jersey.server.impl.template.ViewableMessageBodyWriter

7-jul-2011 16:25:03 com.sun.jersey.spi.container.ContainerResponse logException

SEVERE: Mapped exception to response: 500 (Internal Server Error)

javax.ws.rs.WebApplicationException: com.sun.jersey.api.MessageException: A message body writer for Java class org.basex.api.jaxrx.BXJaxRx$2, and Java type class org.basex.api.jaxrx.BXJaxRx$2, and MIME media type text/xml; omit-xml-declaration=no was not found

at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:285)

at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1310)

at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1223)

at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1213)

at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)

at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)

at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)

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I already tried removing the "; omit-xml-declaration=no" but that didn't help.

Any ideas on why this does not work?