How to use

deserializers

method

in

com.fasterxml.jackson.databind.cfg.DeserializerFactoryConfig

protected JsonDeserializer<?> _findCustomTreeNodeDeserializer(Class<? extends JsonNode> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findTreeNodeDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

@SuppressWarnings("unchecked")
protected JsonDeserializer<Object> _findCustomBeanDeserializer(JavaType type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findBeanDeserializer(type, config, beanDesc);
    if (deser != null) {
      return (JsonDeserializer<Object>) deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomArrayDeserializer(ArrayType type,
    DeserializationConfig config, BeanDescription beanDesc,
    TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findArrayDeserializer(type, config,
        beanDesc, elementTypeDeserializer, elementDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomCollectionLikeDeserializer(CollectionLikeType type,
    DeserializationConfig config, BeanDescription beanDesc,
    TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findCollectionLikeDeserializer(type, config, beanDesc,
        elementTypeDeserializer, elementDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomCollectionDeserializer(CollectionType type,
    DeserializationConfig config, BeanDescription beanDesc,
    TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findCollectionDeserializer(type, config, beanDesc,
        elementTypeDeserializer, elementDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomReferenceDeserializer(ReferenceType type,
    DeserializationConfig config, BeanDescription beanDesc,
    TypeDeserializer contentTypeDeserializer, JsonDeserializer<?> contentDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findReferenceDeserializer(type, config, beanDesc,
        contentTypeDeserializer, contentDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomMapDeserializer(MapType type,
    DeserializationConfig config, BeanDescription beanDesc,
    KeyDeserializer keyDeserializer,
    TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findMapDeserializer(type, config, beanDesc,
        keyDeserializer, elementTypeDeserializer, elementDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomMapLikeDeserializer(MapLikeType type,
    DeserializationConfig config, BeanDescription beanDesc,
    KeyDeserializer keyDeserializer,
    TypeDeserializer elementTypeDeserializer, JsonDeserializer<?> elementDeserializer)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findMapLikeDeserializer(type, config, beanDesc,
        keyDeserializer, elementTypeDeserializer, elementDeserializer);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

@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));
}

assertNull(serializers.findSerializer(null, SimpleType.construct(Number.class), null));
Deserializers deserializers = getDeserializerFactoryConfig(mapper).deserializers().iterator().next();
assertSame(deserializer, deserializers.findBeanDeserializer(SimpleType.construct(Date.class), null, null));

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomTreeNodeDeserializer(Class<? extends JsonNode> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findTreeNodeDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomTreeNodeDeserializer(Class<? extends JsonNode> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findTreeNodeDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomTreeNodeDeserializer(Class<? extends JsonNode> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findTreeNodeDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomTreeNodeDeserializer(Class<? extends JsonNode> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findTreeNodeDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}

protected JsonDeserializer<?> _findCustomEnumDeserializer(Class<?> type,
    DeserializationConfig config, BeanDescription beanDesc)
  throws JsonMappingException
{
  for (Deserializers d  : _factoryConfig.deserializers()) {
    JsonDeserializer<?> deser = d.findEnumDeserializer(type, config, beanDesc);
    if (deser != null) {
      return deser;
    }
  }
  return null;
}