com.fasterxml.jackson.databind.JsonDeserializer Java Examples

@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))));
}
 

@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)));
}
 

/**
 * 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;
}
 

@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;
}
 

@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;
}
 

/**
 * 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;
}
 

@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;
}
 

@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;
}
 

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;
}
 

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 deserializationContext, BeanProperty beanProperty) {
    JavaType javaType = deserializationContext.getContextualType() != null ? deserializationContext.getContextualType() : extractType(beanProperty.getMember());
    Annotation[] annotations = annotations(beanProperty);
    AnnotatedType detectedType = environment.typeTransformer.transform(ClassUtils.addAnnotations(TypeUtils.toJavaType(javaType), annotations));
    JavaType substituteType = deserializationContext.getTypeFactory().constructType(environment.getMappableInputType(detectedType).getType());
    if (inputConverter.supports(detectedType)) {
        return new ConvertingDeserializer(detectedType, substituteType, inputConverter, environment, objectMapper);
    } else {
        return new DefaultDeserializer(javaType);
    }
}
 

/**
 * 注册指定类型的序列化器与反序列化器
 * 
 * @param clazz
 * @param deserializer
 * @param serializer
 */
public static <T> void registerModule(Class<T> clazz, JsonDeserializer<T> deserializer, JsonSerializer<T> serializer) {
    if (deserializer != null) {
        TYPE_MODULE.addDeserializer(clazz, deserializer);
    }
    if (serializer != null) {
        TYPE_MODULE.addSerializer(clazz, serializer);
    }
}
 

@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
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;
}
 

/**
 * @since 2.8
 */
protected TypeDeserializerBase(JavaType baseType, TypeIdResolver idRes,
        String typePropertyName, boolean typeIdVisible, JavaType defaultImpl)
{
    _baseType = baseType;
    _idResolver = idRes;
    _typePropertyName = ClassUtil.nonNullString(typePropertyName);
    _typeIdVisible = typeIdVisible;
    // defaults are fine, although shouldn't need much concurrency
    _deserializers = new ConcurrentHashMap<String, JsonDeserializer<Object>>(16, 0.75f, 2);
    _defaultImpl = defaultImpl;
    _property = null;
}
 

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

@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<?> findBeanDeserializer(JavaType type, DeserializationConfig config, BeanDescription beanDesc)
    throws JsonMappingException {
    if (SdkPojo.class.isAssignableFrom(type.getRawClass()) && !SdkBuilder.class.isAssignableFrom(type.getRawClass())) {
        return new SdkPojoDeserializer(type);
    }
    return null;
}
 

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

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

@Override
@SuppressWarnings("unchecked")
public JsonDeserializer<?> findDeserializer(Annotated a) {
  StoredAsJson storedAsJson = a.getAnnotation(StoredAsJson.class);
  RosettaDeserialize rosettaDeserialize = a.getAnnotation(RosettaDeserialize.class);
  if (storedAsJson != null && rosettaDeserialize != null) {
    throw new IllegalArgumentException("Cannot have @StoredAsJson as well as @RosettaDeserialize annotations on the same entry");
  }
  if (storedAsJson != null) {
    if (a instanceof AnnotatedMethod) {
      a = getAnnotatedTypeFromAnnotatedMethod((AnnotatedMethod) a);
    }

    String empty = StoredAsJson.NULL.equals(storedAsJson.empty()) ? "null" : storedAsJson.empty();
    return new StoredAsJsonDeserializer(a.getRawType(), getType(a), empty, objectMapper);
  }

  if (rosettaDeserialize != null) {
    Class<? extends JsonDeserializer> klass = rosettaDeserialize.using();
    if (klass != JsonDeserializer.None.class) {
      return ClassUtil.createInstance(
          klass,
          objectMapper.getDeserializationConfig().canOverrideAccessModifiers());
    }
  }

  return null;
}
 

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

@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);
}
 

@Override
public JsonDeserializer<?> modifyDeserializer(DeserializationConfig config, BeanDescription beanDesc, JsonDeserializer<?> deserializer) {
    if (Metric.class.equals(beanDesc.getBeanClass())) {
        return new MetricDeserializer(deserializer);
    }

    return super.modifyDeserializer(config, beanDesc, deserializer);
}
 

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

@Override
public JsonDeserializer<?> findReferenceDeserializer(ReferenceType refType, DeserializationConfig config,
                                                     BeanDescription beanDesc, TypeDeserializer contentTypeDeserializer,
                                                     JsonDeserializer<?> contentDeserializer) throws JsonMappingException {
    for (Deserializers deserializers : deserializersList) {
        JsonDeserializer<?> deserializer = deserializers.findReferenceDeserializer(refType, config, beanDesc, contentTypeDeserializer, contentDeserializer);
        if (deserializer != null) {
            return deserializer;
        }
    }
    return null;
}