com.fasterxml.jackson.databind.JsonDeserializer Java Examples

@Test
public void setupModule() throws JsonMappingException {
  SetupContext context = mock(SetupContext.class);

  underTest.setupModule(context);

  ArgumentCaptor<SimpleSerializers> serializersCaptor = ArgumentCaptor.forClass(SimpleSerializers.class);
  ArgumentCaptor<SimpleDeserializers> deserializersCaptor = ArgumentCaptor.forClass(SimpleDeserializers.class);

  verify(context).addSerializers(serializersCaptor.capture());
  verify(context).addDeserializers(deserializersCaptor.capture());

  JavaType javaType = new ObjectMapper().constructType(Schema.class);

  JsonSerializer<?> serializer = serializersCaptor.getValue().findSerializer(null, javaType, null);
  assertThat(serializer, is(instanceOf(SchemaSerializer.class)));

  JsonDeserializer<?> deserializer = deserializersCaptor.getValue().findBeanDeserializer(javaType, null, null);
  assertThat(deserializer, is(instanceOf(SchemaDeserializer.class)));
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
        BeanProperty property) throws JsonMappingException
{
    JsonFormat.Value format = findFormatOverrides(ctxt, property, handledType());
    JSR310StringParsableDeserializer deser = this;
    if (format != null) {
        if (format.hasLenient()) {
            Boolean leniency = format.getLenient();
            if (leniency != null) {
                deser = this.withLeniency(leniency);
            }
        }
    }
    return deser;
}
 

private static void initClient() {
  JacksonJaxbJsonProvider provider = new JacksonJaxbJsonProvider();
  ObjectMapper objectMapper = JSONUtil.prettyMapper();
  JSONUtil.registerStorageTypes(objectMapper, DremioTest.CLASSPATH_SCAN_RESULT,
      ConnectionReader.of(DremioTest.CLASSPATH_SCAN_RESULT, DremioTest.DEFAULT_SABOT_CONFIG));
  objectMapper.registerModule(
    new SimpleModule()
      .addDeserializer(JobDataFragment.class,
        new JsonDeserializer<JobDataFragment>() {
          @Override
          public JobDataFragment deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
            return jsonParser.readValueAs(DataPOJO.class);
          }
        }
      )
  );
  provider.setMapper(objectMapper);
  client = ClientBuilder.newBuilder().register(provider).register(MultiPartFeature.class).build();
  WebTarget rootTarget = client.target("http://localhost:" + currentDremioDaemon.getWebServer().getPort());
  currentApiV2 = rootTarget.path(API_LOCATION);
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
                                            BeanProperty property) throws JsonMappingException {
    if (property != null) {
        JsonFormat.Value format = ctxt.getAnnotationIntrospector().findFormat((Annotated) property.getMember());
        if (format != null) {
            if (format.hasPattern()) {
                final String pattern = format.getPattern();
                final Locale locale = format.hasLocale() ? format.getLocale() : ctxt.getLocale();
                DateTimeFormatter df;
                if (locale == null) {
                    df = DateTimeFormatter.ofPattern(pattern);
                } else {
                    df = DateTimeFormatter.ofPattern(pattern, locale);
                }
                return withDateFormat(df);
            }
            // any use for TimeZone?
        }
    }
    return this;
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt,
                                            BeanProperty property) throws JsonMappingException
{
    JsonFormat.Value format = findFormatOverrides(ctxt, property, handledType());
    DurationDeserializer deser = this;
    if (format != null) {
        if (format.hasLenient()) {
            Boolean leniency = format.getLenient();
            if (leniency != null) {
                deser = deser.withLeniency(leniency);
            }
        }
    }
    return deser;
}
 

/**
 * Gets a module wrapping this serializer as an adapter for the Jackson
 * ObjectMapper.
 *
 * @param mapper the object mapper for default deserializations
 * @return a simple module to be plugged onto Jackson ObjectMapper.
 */
public static SimpleModule getModule(final ObjectMapper mapper) {
    SimpleModule module = new SimpleModule();
    module.setDeserializerModifier(new BeanDeserializerModifier() {
        @Override
        public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc, JsonDeserializer<?> deserializer) {
            for (Class<?> c : TypeToken.of(beanDesc.getBeanClass()).getTypes().classes().rawTypes()) {
                Field[] fields = c.getDeclaredFields();
                for (Field field : fields) {
                    if ("additionalProperties".equalsIgnoreCase(field.getName())) {
                        JsonProperty property = field.getAnnotation(JsonProperty.class);
                        if (property != null && property.value().isEmpty()) {
                            return new AdditionalPropertiesDeserializer(beanDesc.getBeanClass(), deserializer, mapper);
                        }
                    }
                }
            }
            return deserializer;
        }
    });
    return module;
}
 

private static ObjectMapper configureObjectMapper(
        ObjectMapper objectMapper, boolean shouldIncludeRawResponses) {
    if (shouldIncludeRawResponses) {
        SimpleModule module = new SimpleModule();
        module.setDeserializerModifier(new BeanDeserializerModifier() {
            @Override
            public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config,
                                                          BeanDescription beanDesc,
                                                          JsonDeserializer<?> deserializer) {
                if (Response.class.isAssignableFrom(beanDesc.getBeanClass())) {
                    return new RawResponseDeserializer(deserializer);
                }

                return deserializer;
            }
        });

        objectMapper.registerModule(module);
    }

    objectMapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

    return objectMapper;
}
 

@Override
protected T _deserializeContents(JsonParser p, DeserializationContext ctxt) throws IOException,
        JsonProcessingException {
    JsonDeserializer<?> valueDes = _valueDeserializer;
    JsonToken t;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;
    T set = createMultiset();

    while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
        Object value;

        if (t == JsonToken.VALUE_NULL) {
            if (_skipNullValues) {
                continue;
            }
            value = _nullProvider.getNullValue(ctxt);
        } else if (typeDeser == null) {
            value = valueDes.deserialize(p, ctxt);
        } else {
            value = valueDes.deserializeWithType(p, ctxt, typeDeser);
        }
        set.add(value);
    }
    return set;
}
 

@Test
public void createInstantiatesObjectMapperWithInlineAssociationDeserializerAwareHandlerInstantiator() {
	ObjectMapper mapper = new ObjectMapper();
	RestTemplate restTemplate = new RestTemplate();
	
	when(mapperFactory.create(any())).thenReturn(mapper);
	when(restTemplateFactory.create(any(), any())).thenReturn(restTemplate);
	
	factory.create();

	ArgumentCaptor<HandlerInstantiator> handlerInstantiator = ArgumentCaptor.forClass(HandlerInstantiator.class);
	verify(mapperFactory).create(handlerInstantiator.capture());
	
	JsonDeserializer<?> result = handlerInstantiator.getValue()
		.deserializerInstance(null, null, InlineAssociationDeserializer.class);
	
	assertThat(result, is(anInlineAssociationDeserializerMatching(
		aRestOperationsMatching(is(restTemplate), is(mapper)), is(proxyFactory))));
}
 

/**
 * Gets a module wrapping this serializer as an adapter for the Jackson
 * ObjectMapper.
 *
 * @param mapper the object mapper for default deserializations
 * @return a simple module to be plugged onto Jackson ObjectMapper.
 */
public static SimpleModule getModule(final ObjectMapper mapper) {
    SimpleModule module = new SimpleModule();
    module.setDeserializerModifier(new BeanDeserializerModifier() {
        @Override
        public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc, JsonDeserializer<?> deserializer) {
            if (BeanDeserializer.class.isAssignableFrom(deserializer.getClass())) {
                // Apply flattening deserializer on all POJO types.
                return new FlatteningDeserializer(beanDesc.getBeanClass(), deserializer, mapper);
            } else {
                return deserializer;
            }
        }
    });
    return module;
}
 

private void readAndWrite(final InputStream input, final OutputStream output) throws IOException {
  try (JsonParser parser = new CurrentPathJsonParser(_jsonFactory.createParser(input))) {

    JsonToken token = _initForReading(parser, valueType);
    DeserializationConfig config = getDeserializationConfig();
    DeserializationContext context = createDeserializationContext(parser, config);

    if (token != VALUE_NULL && token != END_ARRAY && token != END_OBJECT) {

      try (JsonGenerator generator = jsonFactory.createGenerator(output)) {

        generator.writeStartObject();

        beforeDeserialize(generator);

        JsonDeserializer<?> rootDeserializer = _findRootDeserializer(context, valueType);
        deserializeAndSerialize(parser, context, (MapDeserializer) rootDeserializer, generator);

        afterDeserialize(generator);

        context.checkUnresolvedObjectId();
      }
    }

    if (config.isEnabled(FAIL_ON_TRAILING_TOKENS)) {
      _verifyNoTrailingTokens(parser, context, valueType);
    }
  }
}
 

@Bean
public Module offsetDateTimeModule() {
  return new SimpleModule("OffsetDateTime", unknownVersion(),
      singletonMap(OffsetDateTime.class, new JsonDeserializer<OffsetDateTime>() {
        @Override
        public OffsetDateTime deserialize(JsonParser p, DeserializationContext ctxt)
          throws IOException, JsonProcessingException {
          return OffsetDateTime.parse(p.getValueAsString());
        }
      }));
}
 

@Test
public void deserializerByType() throws JsonMappingException {
	JsonDeserializer<Date> deserializer = new DateDeserializers.DateDeserializer();
	ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json()
			.modules(new ArrayList<>())  // Disable well-known modules detection
			.deserializerByType(Date.class, deserializer).build();
	assertTrue(getDeserializerFactoryConfig(objectMapper).hasDeserializers());
	Deserializers deserializers = getDeserializerFactoryConfig(objectMapper).deserializers().iterator().next();
	assertSame(deserializer, deserializers.findBeanDeserializer(SimpleType.construct(Date.class), null, null));
}
 

/**
 * Constructor used when creating contextualized instances.
 *
 * @since 2.9
 */
protected CustomCollectionDeserializer(JavaType collectionType,
    JsonDeserializer<Object> valueDeser, TypeDeserializer valueTypeDeser,
    ValueInstantiator valueInstantiator, JsonDeserializer<Object> delegateDeser,
    NullValueProvider nuller, Boolean unwrapSingle) {
  super(collectionType, nuller, unwrapSingle);
  _valueDeserializer = valueDeser;
  _valueTypeDeserializer = valueTypeDeser;
  _valueInstantiator = valueInstantiator;
  _delegateDeserializer = delegateDeser;
}
 

@Override
@SuppressWarnings("unchecked")
public JsonDeserializer<Object> createBeanDeserializer(DeserializationContext ctxt, JavaType type, BeanDescription beanDesc)
        throws JsonMappingException
{
    for (Deserializers d  : _factoryConfig.deserializers()) {
        JsonDeserializer<?> deser = d.findBeanDeserializer(type, ctxt.getConfig(), beanDesc);
        if (deser != null) {
            return (JsonDeserializer<Object>) deser;
        }
    }
    throw new IllegalArgumentException("No explicitly configured deserializer for " + type);
}
 

private StrictObjectMapper(BlockAllocator allocator)
{
    super(JSON_FACTORY);
    _serializerFactory = SERIALIZER_FACTORY;

    ImmutableMap<Class<?>, JsonDeserializer<?>> desers = ImmutableMap.of(
            FederationRequest.class, createRequestDeserializer(allocator),
            FederationResponse.class, createResponseDeserializer(allocator),
            LambdaFunctionException.class, new LambdaFunctionExceptionSerDe.Deserializer());
    SimpleDeserializers deserializers = new SimpleDeserializers(desers);
    DeserializerFactoryConfig dConfig = new DeserializerFactoryConfig().withAdditionalDeserializers(deserializers);
    _deserializationContext = new DefaultDeserializationContext.Impl(new StrictDeserializerFactory(dConfig));
    // required by LambdaInvokerFactory
    disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property)
{
    JavaType requiredType = property.getType();
    return "Ljava/util/function/Supplier<Ljava/util/Optional<Lorg/openqa/selenium/WebElement;>;>;"
            .equals(requiredType.getGenericSignature()) ? this : null;
}
 

@Override
public LazyEither3<?,?,?> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
  JsonDeserializer ser = ctxt.findRootValueDeserializer(ctxt.getTypeFactory().constructSimpleType(LazyEitherBean.class, new JavaType[0]));
  LazyEitherBean x = (LazyEitherBean)ser.deserialize(p, ctxt);
  if(x.left1!=null){
    return LazyEither3.left1(x.left1);
  }
  if(x.left2!=null){
    return LazyEither3.left2(x.left2);
  }
  return LazyEither3.right(x.right);
}
 

@Override
protected Ref withResolved(
        TypeDeserializer typeDeserializerForValue,
        JsonDeserializer<?> valueDeserializer
) {
    return new ImmutableSortedBagDeserializer.Ref(_elementType, typeDeserializerForValue, valueDeserializer);
}
 

@SuppressWarnings("unchecked")
public UntypedObjectDeserializer(UntypedObjectDeserializer base,
        JsonDeserializer<?> mapDeser, JsonDeserializer<?> listDeser,
        JsonDeserializer<?> stringDeser, JsonDeserializer<?> numberDeser)
{
    super(Object.class);
    _mapDeserializer = (JsonDeserializer<Object>) mapDeser;
    _listDeserializer = (JsonDeserializer<Object>) listDeser;
    _stringDeserializer = (JsonDeserializer<Object>) stringDeser;
    _numberDeserializer = (JsonDeserializer<Object>) numberDeser;
    _listType = base._listType;
    _mapType = base._mapType;
    _nonMerging = base._nonMerging;
}
 

@Override
public JsonDeserializer<?> createContextual( DeserializationContext ctxt, BeanProperty property) throws JsonMappingException {
    CollectionType collectionType = ctxt.getTypeFactory().constructCollectionType(List.class, property.getType().containedType(0));
    DataStreamDeserializer deserializer = new DataStreamDeserializer();
    deserializer.collectionType = collectionType;
    return deserializer;
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException {
    CollectionType collectionType = ctxt.getTypeFactory().constructCollectionType(List.class, property.getType().containedType(0));
    DataStoreDeserializer deserializer = new DataStoreDeserializer();
    deserializer.collectionType = collectionType;
    return deserializer;
}
 

@Override
protected T _deserializeContents(JsonParser p, DeserializationContext ctxt)
        throws IOException, JsonProcessingException
{
    JsonDeserializer<?> valueDes = _valueDeserializer;
    JsonToken t;
    final TypeDeserializer typeDeser = _valueTypeDeserializer;
    // No way to pass actual type parameter; but does not matter, just
    // compiler-time fluff:
    ImmutableCollection.Builder<Object> builder = createBuilder();

    while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
        Object value;

        if (t == JsonToken.VALUE_NULL) {
            if (_skipNullValues) {
                continue;
            }
            value = _resolveNullToValue(ctxt);
        } else if (typeDeser == null) {
            value = valueDes.deserialize(p, ctxt);
        } else {
            value = valueDes.deserializeWithType(p, ctxt, typeDeser);
        }
        builder.add(value);
    }
    // No class outside of the package will be able to subclass us,
    // and we provide the proper builder for the subclasses we implement.
    @SuppressWarnings("unchecked")
    T collection = (T) builder.build();
    return collection;
}
 

@Override
public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) {
    final JavaType genericType = ctxt.getContextualType().containedType(0);
    if (genericType == null) return this;
    final RangeSetDeserializer deserializer = new RangeSetDeserializer();
    deserializer.genericRangeListType = ctxt.getTypeFactory().constructCollectionType(List.class,
            ctxt.getTypeFactory().constructParametricType(Range.class, genericType));
    return deserializer;
}
 

@Test
public void deserializerInstanceReturnsNull() {

    // given
    VirtualProperty[] customProperties = new VirtualProperty[0];
    Log4j2Lookup valueResolver = new Log4j2Lookup(null);
    JacksonHandlerInstantiator handlerInstantiator = createTestHandlerInstantiator(customProperties, valueResolver);

    // when
    JsonDeserializer<?> result = handlerInstantiator.deserializerInstance(null, null, null);

    // then
    Assert.assertNull(result);

}
 

@Override
protected @Nonnull StdDelegatingDeserializer<RangeSet<?>> withDelegate(
    Converter<Object, RangeSet<?>> converter,
    JavaType delegateType,
    JsonDeserializer<?> delegateDeserializer) {
  return new StdDelegatingDeserializer<>(converter, delegateType, delegateDeserializer);
}
 

@Override
public GuavaMapDeserializer<ImmutableSortedMap<Object, Object>> withResolved(KeyDeserializer keyDeser,
        JsonDeserializer<?> valueDeser, TypeDeserializer typeDeser,
        NullValueProvider nuller)
{
    return new ImmutableSortedMapDeserializer(_containerType, keyDeser, valueDeser, typeDeser, nuller);
}
 

@Test
public void createInstantiatesObjectMapperWithResourceDeserializerAwareHandlerInstantiator() {
	factory.create();
	
	ArgumentCaptor<HandlerInstantiator> handlerInstantiator = ArgumentCaptor.forClass(HandlerInstantiator.class);
	verify(mapperFactory).create(handlerInstantiator.capture());
	
	JsonDeserializer<?> result = handlerInstantiator.getValue()
		.deserializerInstance(null, null, ResourceDeserializer.class);
	
	assertThat(result, is(aResourceDeserializerMatching(instanceOf(DefaultTypeResolver.class),
		is(configuration))));
}
 

@Override
public Ior<?,?> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
  JsonDeserializer ser = ctxt.findRootValueDeserializer(ctxt.getTypeFactory().constructSimpleType(IorBean.class, new JavaType[0]));
  IorBean x = (IorBean)ser.deserialize(p, ctxt);
  if(x.left!=null && x.right==null){
    return Ior.left(x.left);
  }
  if(x.left==null && x.right!=null){
    return Ior.right(x.right);
  }
  return Ior.both(x.left,x.right);
}
 

@Override
protected JsonDeserializer<T> withDateFormat(DateTimeFormatter dtf) {
  if (dtf == _formatter) {
    return this;
  }
  return new CustomInstantDeserializer<T>(this, dtf);
}