Afterburner with joda module does not always include null values

[esiqveland]

Afterburner together with joda module does not always include null values.

Test to reproduce:

    @JsonInclude(JsonInclude.Include.ALWAYS)
    static class TestClass {
        @JsonProperty("name")
        private String name;
        @JsonProperty("id")
        private String id;
        @JsonProperty("created_at")
        private DateTime created_at;
        @JsonProperty("updated_at")
        private DateTime updated_at;

        public String getName() {
            return name;
        }

        public TestClass setName(String name) {
            this.name = name;
            return this;
        }

        public String getId() {
            return id;
        }

        public TestClass setId(String id) {
            this.id = id;
            return this;
        }

        public DateTime getCreated_at() {
            return created_at;
        }

        public DateTime getUpdated_at() {
            return updated_at;
        }

        public TestClass setCreated_at(final DateTime created_at) {
            this.created_at = created_at;
            return this;
        }

        public TestClass setUpdated_at(final DateTime updated_at) {
            this.updated_at = updated_at;
            return this;
        }

    }

    @Test
    public void test_serialize_jackson() throws JsonProcessingException {

        TestClass tilstand = new TestClass()
                .setId(null)
                .setName("name")
                .setUpdated_at(null)
                .setCreated_at(new DateTime());

        ObjectMapper mapper = new ObjectMapper();
        mapper.registerModule(new JodaModule());
        mapper.registerModule(new AfterburnerModule());

        String json = mapper.writeValueAsString(tilstand);

        assertThat(json, containsString("id"));
        assertThat(json, containsString("name"));
        assertThat(json, containsString("updated_at"));
        assertThat(json, containsString("created_at"));
    }

If you comment out AfterburnerModule, the test passes. I am using v. 2.6.3

Also tried against current master here with datatype-joda 2.7.4, and the test fails. I could publish it, but I had to mess around with some of the maven poms to get it running.

[cowtowncoder]

@esiqveland Turns out this is the same problem, for what that is worth. Fix itself easy enough, but testing this with type other than Joda DateTime proving unexpectedly difficult... so not sure what the combination is. Anyway, adding notes on #7, closing this as duplicate. Thank you for the reproduction, it was necessary to actually see the issue.