org.codehaus.groovy.runtime.metaclass.MissingPropertyExceptionNoStack: No such property

[confile]

Using Grails 2.4.4 with JaxRS 0.11 and the following to set custom provider in Config.groovy:

org.grails.jaxrs.doreader.disable=true
org.grails.jaxrs.dowriter.disable=true

I tried to read the following object from client:

public class RoomServiceOrderDto {

String id = "test";
Map<String, Integer> itemsMap = new LinkedHashMap<>()
}

Therefore I created the following reader:

@Provider
@Consumes("application/json")
class RoomServiceOrderDtoReader extends MessageBodyReaderSupport<RoomServiceOrderDto> {

    @Override
    public RoomServiceOrderDto readFrom(MultivaluedMap<String, String> httpHeaders,
            InputStream entityStream) throws IOException,
            WebApplicationException {

        return new JsonSlurper().parse(new InputStreamReader(entityStream))
    }

}

The `RoomServiceOrderDto is sent in a POST request as body params to a RoomServiceResource which has the following post method:

  @POST
  @Consumes('application/json')
  @Produces('application/json')
  boolean post(
    @QueryParam("test") String test,
    RoomServiceOrderDto roomServiceOrderDto) {
    ....
   }

Here is the error I get:

ERROR container.ContainerResponse  - The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
Message: Cannot cast object '{77c047205807f298b3=2}' with class 'groovy.json.internal.LazyMap' to class 'majestella.shared.dto.RoomServiceOrderDto' due to: org.codehaus.groovy.runtime.metaclass.MissingPropertyExceptionNoStack: No such property: 77c047205807f298b3 for class: majestella.shared.dto.RoomServiceOrderDto
    Line | Method
->>   24 | readFrom            in majestella.RoomServiceOrderDtoReader
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     55 | readFrom            in org.grails.jaxrs.support.MessageBodyReaderSupport
|    490 | getEntity . . . . . in com.sun.jersey.spi.container.ContainerRequest
|    123 | getValue            in com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable
|     86 | getInjectableValues in com.sun.jersey.server.impl.inject.InjectableValuesProvider
|    153 | getParams           in com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker
|    183 | _dispatch . . . . . in com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker
|     75 | dispatch            in com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher
|    302 | accept . . . . . .  in com.sun.jersey.server.impl.uri.rules.HttpMethodRule
|    108 | accept              in com.sun.jersey.server.impl.uri.rules.ResourceClassRule
|    147 | accept . . . . . .  in com.sun.jersey.server.impl.uri.rules.RightHandPathRule
|     84 | accept              in com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule
|   1542 | _handleRequest . .  in com.sun.jersey.server.impl.application.WebApplicationImpl
|   1473 | _handleRequest      in     ''
|   1419 | handleRequest . . . in     ''
|   1409 | handleRequest       in     ''
|    409 | service . . . . . . in com.sun.jersey.spi.container.servlet.WebComponent
|    540 | service             in com.sun.jersey.spi.container.servlet.ServletContainer
|    715 | service . . . . . . in     ''
|    193 | process             in org.grails.jaxrs.web.JaxrsContext$JaxrsServiceImpl
|     45 | handle . . . . . .  in org.grails.jaxrs.JaxrsController
|    198 | doFilter            in grails.plugin.cache.web.filter.PageFragmentCachingFilter
|     63 | doFilter . . . . .  in grails.plugin.cache.web.filter.AbstractFilter
|     53 | doFilter            in grails.plugin.springsecurity.web.filter.GrailsAnonymousAuthenticationFilter
|     62 | doFilter . . . . .  in grails.plugin.springsecurity.web.authentication.logout.MutableLogoutFilter
|     46 | doFilterInternal    in org.grails.jaxrs.web.JaxrsFilter
|   1142 | runWorker . . . . . in java.util.concurrent.ThreadPoolExecutor
|    617 | run                 in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run . . . . . . . . in java.lang.Thread
Error |

What did I miss?