JsonBindingProvider.writeTo() Failed to Process Polymorphic Object

[arieki]

this PR #5047 breaks the polymorphic behaviour.
I found a problem when the object is polymorphism, the JSON object won't be written into the entityStream.

When the object is polymorphism it will have a parent class type as genericType value which causes the entityStream is not written correctly which makes the entityStream value = {}.

jsonb.toJson(object, type, writer) will only write the object into entityStream if the object has equal class type with type parameter

[senivam]

thanks for the report! Could you please provide a reproducer?

[arieki]

thanks for the report! Could you please provide a reproducer?

Sorry for the late response,
I found this issue while running opentracing-tck against Payara 6.

Here is the simple reproducer https://github.com/arieki/jersey-reproducer
you may run it against Payara 6 version 6.2022.1.Alpha4.RC2

[arieki]

I will submit a PR for the fixing ASAP

[jbescos]

Hi @arieki

I am testing this in master and tests are passing. Here is the test:

public class Issue5125Test extends JerseyTest {

    @Override
    protected Application configure() {
        return new ResourceConfig(Resource.class).register(JsonBindingFeature.class);
    }

    @Test
    public void entity() {
        assertEquals("{\"name\":\"this is simple entity\",\"type\":\"simple entity\"}",
                target("/test/entity").request().get(String.class));
    }

    @Test
    public void simpleEntity() {
        assertEquals("{\"name\":\"this is simple entity\",\"type\":\"simple entity\"}",
                target("/test/simpleEntity").request().get(String.class));
    }

    @Path("/test")
    public static class Resource {

        @Path("/entity")
        @GET
        @Produces(MediaType.APPLICATION_JSON)
        public Entity getEntity() {
            SimpleEntity simpleEntity = new SimpleEntity();
            simpleEntity.setName("this is simple entity");
            return simpleEntity;
        }

        @Path("/simpleEntity")
        @GET
        @Produces(MediaType.APPLICATION_JSON)
        public SimpleEntity getSimpleEntity() {
            SimpleEntity simpleEntity = new SimpleEntity();
            simpleEntity.setName("this is simple entity");
            return simpleEntity;
        }
    }

    public static interface Entity {
        String getType();
    }

    public static class SimpleEntity implements Entity {
        private String name;
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        @Override
        public String getType() {
            return "simple entity";
        }
    }
}

[jansupol]

Glassfish 6.2.5 with Jersey 3.0.8 (and Jackson jackson-module-jakarta-xmlbind-annotations-2.13.3.jar added - required by Jersey Jackson modules), reproduced:

{"name":"this is simple entity","type":"simple entity"}

Either Jersey fixed that, or it's a bug in Payara (Payara builds Jersey from their repository for some reason)