@Override
    public boolean handleUnknownProperty(DeserializationContext deserializationContext, JsonParser p,
                                         JsonDeserializer<?> deserializer, Object beanOrClass,
                                         String propertyName) throws IOException {
        Collection<Object> propIds = (deserializer == null) ? null : deserializer.getKnownPropertyNames();
        UnrecognizedPropertyException unrecognizedPropertyException = UnrecognizedPropertyException
                .from(p, beanOrClass, propertyName, propIds);
        if (skipUnknownProperty){
            if (log.isDebugEnabled()) {
                log.debug(unrecognizedPropertyException.getMessage());
            }
            p.skipChildren();
            return skipUnknownProperty;
        } else {
            throw unrecognizedPropertyException;
        }
    }
@Test
    public void testHandleUnknownProperty() throws Exception{
        DynamicSkipUnknownPropertyHandler handler = new DynamicSkipUnknownPropertyHandler();
        handler.setSkipUnknownProperty(true);
        // Case 1: initial ObjectMapper with "enable feature".
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.enable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.addHandler(handler);
        ObjectReader objectReader = objectMapper.readerFor(TestBean.class);
        // Assert skip unknown property and logging: objectMapper.
        String json = "{\"name1\": \"James\",\"nm\":\"Paul\",\"name2\":\"Eric\"}";
        TestBean testBean = objectMapper.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        // Assert skip unknown property and logging: objectReader.
        testBean = objectReader.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        // Assert failure on unknown property.
        handler.setSkipUnknownProperty(false);
        try {
            objectMapper.readValue(json, TestBean.class);
            Assert.fail("Expect UnrecognizedPropertyException when set skipUnknownProperty false.");
        } catch (UnrecognizedPropertyException e){

        }
        try {
            objectReader.readValue(json, TestBean.class);
            Assert.fail("Expect UnrecognizedPropertyException when set skipUnknownProperty false.");
        } catch (UnrecognizedPropertyException e){

        }
        // Case 2: initial ObjectMapper with "disabled feature".
        objectMapper = new ObjectMapper();
        objectMapper.enable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        objectMapper.addHandler(handler);
        objectReader = objectMapper.readerFor(TestBean.class);
        // Assert failure on unknown property.
        try {
            objectMapper.readValue(json, TestBean.class);
            Assert.fail("Expect UnrecognizedPropertyException when set skipUnknownProperty false.");
        } catch (UnrecognizedPropertyException e){

        }
        try {
            objectReader.readValue(json, TestBean.class);
            Assert.fail("Expect UnrecognizedPropertyException when set skipUnknownProperty false.");
        } catch (UnrecognizedPropertyException e){

        }
        // Assert skip unknown property and logging.
        handler.setSkipUnknownProperty(true);
        testBean = objectMapper.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        testBean = objectReader.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        // Case 3: unknown property deserialize by object json.
        json = "{\"name1\": \"James\",\"nm\":{\"name\":\"Paul\",\"age\":18},\"name2\":\"Eric\"}";
        // Assert skip unknown property and logging.
        handler.setSkipUnknownProperty(true);
        testBean = objectMapper.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        testBean = objectReader.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        // Case 4: unknown property deserialize by array json.
        json = "{\"name1\": \"James\",\"nm\":[\"name\",\"Paul\"],\"name2\":\"Eric\"}";
        // Assert skip unknown property and logging.
        handler.setSkipUnknownProperty(true);
        testBean = objectMapper.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
        testBean = objectReader.readValue(json, TestBean.class);
        Assert.assertNull(testBean.getName());
        Assert.assertEquals(testBean.getName1(), "James");
        Assert.assertEquals(testBean.getName2(), "Eric");
    }