Jersey Jackson data entity filtering JsonMappingException on collection

Question

I have an issue when trying to put in place the “selectable entity filtering”. I have an Abstract class like following one:

   // In your Pom
    

        

Answer 1

It seems that when you are using the SelectableEntityFilteringFeature and if you are putting Collection as an Entity in Response then you will get a JsonMappingException. For me it is a bug. The work around is you should encapsulate your collection into GenericEntity to be able to be serialized by Jersey-Jackson.

return Response.status(Status.OK)
       .entity(new GenericEntity<Set<MyEntity>>(entityIDs)     {}).build(); 
// Use GenericEntity to avoid JsonMappingException  because of the new flow with Filtering

Answer 2

I am using SecurityEntityFilteringFeature, and I ran upon the same error.

StdSerializer.findPropertyFilter.getFilterProvider and StdSerializer.findPropertyFilter are returning null.

My solution is:

@Provider
public class JsonMappingExceptionOnCollectionResponseFilter implements ContainerResponseFilter {
@Override
public void filter(ContainerRequestContext requestCtx, ContainerResponseContext responseCtx) throws IOException {
    ObjectWriterInjector.set(new ObjectWriterModifier() {

        @Override
        public ObjectWriter modify(EndpointConfigBase<?> endpoint, MultivaluedMap<String, Object> responseHeaders, Object valueToWrite, ObjectWriter w, JsonGenerator g) throws IOException {
            SimpleFilterProvider filterProvider = new SimpleFilterProvider();
            SimpleBeanPropertyFilter simpleBeanPropertyFilter = new SimpleBeanPropertyFilter() {
                @Override
                protected boolean include(BeanPropertyWriter writer) {
                    return true;
                }

                @Override
                protected boolean include(PropertyWriter writer) {
                    return true;
                }
            };
            filterProvider.addFilter("your entity class", simpleBeanPropertyFilter);
            filterProvider.addFilter("your entity class", simpleBeanPropertyFilter);
            return w.with(filterProvider);
        }
    });
}

}