Calls to ObjectMapper.addMixInAnnotations on an instance returned by ObjectMapper.copy() are ignored

[edalquist]

Below is a chunk of unit test that demonstrates this problem. It should be easy to reproduce with any POJO. I'm using version 2.2.2

    @JsonFilter(PortletRenderExecutionEventFilterMixIn.FILTER_NAME)
    private interface PortletRenderExecutionEventFilterMixIn {
        static final String FILTER_NAME = "PortletRenderExecutionEventFilter";
    }

    private PortalEvent createEvent() {
        final String sessionId = "1234567890123_system_AAAAAAAAAAA";
        final PortalEvent.PortalEventBuilder eventBuilder = new PortalEvent.PortalEventBuilder(this, "example.com", sessionId, SystemPerson.INSTANCE, null);
        return new PortletRenderExecutionEvent(eventBuilder, new MockPortletWindowId("pw1"), "fname1", 123450000, Collections.<String, List<String>>emptyMap(), false, false);
    }

    @Test
    public void testMixinNoCopy() throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        mapper.findAndRegisterModules();

        mapper.addMixInAnnotations(Object.class, PortletRenderExecutionEventFilterMixIn.class);
        final FilterProvider filterProvider = new SimpleFilterProvider().addFilter(PortletRenderExecutionEventFilterMixIn.FILTER_NAME, SimpleBeanPropertyFilter.filterOutAllExcept("fname", "executionTimeNano", "parameters"));
        final ObjectWriter portletEventWriter = mapper.writer(filterProvider);

        final String result = portletEventWriter.writeValueAsString(createEvent());

        assertEquals("{\"@c\":\".PortletRenderExecutionEvent\",\"fname\":\"fname1\",\"executionTimeNano\":123450000,\"parameters\":{}}", result);
    }

    /**
     * Fails as actual output is:
     * {"@c":".PortletRenderExecutionEvent","timestamp":1371671516798,"serverId":"example.com","eventSessionId":"1234567890123_system_AAAAAAAAAAA","userName":"system","fname":"fname1","executionTimeNano":123450000,"parameters":{},"targeted":false,"usedPortalCache":false}
     */
    @Test
    public void testMixinWithCopy() throws Exception {
        ObjectMapper mapper = new ObjectMapper();
        mapper.findAndRegisterModules();

        //Clone from "shared" ObjectMapper
        mapper = mapper.copy();

        mapper.addMixInAnnotations(Object.class, PortletRenderExecutionEventFilterMixIn.class);
        final FilterProvider filterProvider = new SimpleFilterProvider().addFilter(PortletRenderExecutionEventFilterMixIn.FILTER_NAME, SimpleBeanPropertyFilter.filterOutAllExcept("fname", "executionTimeNano", "parameters"));
        final ObjectWriter portletEventWriter = mapper.writer(filterProvider);

        final String result = portletEventWriter.writeValueAsString(createEvent());

        assertEquals("{\"@c\":\".PortletRenderExecutionEvent\",\"fname\":\"fname1\",\"executionTimeNano\":123450000,\"parameters\":{}}", result);
    }

[cowtowncoder]

Would it be possible to include referred classes as well? I can simplify test, but want to make sure it first works exactly as-is.

[cowtowncoder]

Not sure if this is still valid -- will keep open for a bit, but close without additional information.

[alan-czajkowski]

@cowtowncoder this issue still exists for v2.4.2, please re-open

[cowtowncoder]

Issue was not closed due to not existing, but since reproduction is missing definition of PortalEvent; and so I have no idea how test is supposed to work.

I will re-open this with reproducible test case.

[cowtowncoder]

Actually, let me see; I was actually able to reproduce this after a failed attempt.

[cowtowncoder]

Better late than never; problem was that serializer cache was basically not cleared, so while mix-ins were added, serializers were not being re-constructed.