![]() It is a factory method, i.e., used to get the ObjectWriter instances of proper sub-type. _newWriter(SerializationConfig config, JavaType rootType, PrettyPrinter pp)._newWriter(SerializationConfig config, FormatSchema schema).In order to use this method, it is necessary that the sub-classes must override. It is a factory method, i.e., used to get the ObjectReader instances of proper sub-type. _newReader(DeserializationConfig config, JavaType valueType, Object valueToUpdate, FormatSchema schema, InjectableValues injectableValues)._findRootDeserializer(DeserializationContext ctxt, JavaType valueType)įor the passed root-level value, if we want to locate the de-serializer, we use this method. It is used for ensuring whether the given parser is ready for reading content for data binding or not. Here, read and write methods are not used for the code. It is used to get the actual conversion implementation. _convert(Object fromValue, JavaType toValueType) It is used for configuring the generator when necessary and then performing the write functionality. _configAndWriteValue(JsonGenerator g, Object value) The ObjectMapper class defines the following methods: Method It is a copy-constructor to support copy(). Protected ObjectMapper(ObjectMapper mapper) The given JsonFactory is used to construct JsonParsers and/or JsonGenerators. It is used to construct an instance that uses the given JsonFactory, SerializerProvider, and DeserializerProvider. ObjectMapper(JsonFactory factory, SerializerProvider provider1, DeserializerProvider provider2) It is used to construct an instance that uses the given JsonFactory. It is a default constructor used to construct an instance that uses default JsonFactory, SerializerProvider, and BeanSerializerFactory. ![]() There are the following constructors of the ObjectMapper class: Constructor It is base settings that include defaults used for all ObjectMapper instances. Protected static BaseSettings DEFAULT_BASE It is an object that is responsible for managing the access to serializers used for serialization. Protected DefaultSerializerProvider _serializerProvider They are required for allowing modules to add more custom type handling. It is a factory that is used to create JavaType instances. It is used to register sub-types and to solve them for super/sub-types as needed. Protected SubtypeResolver _subtypeResolver It is a factory that is used to construct the serializers. Protected SerializerFactory _serializerFactory It is a map that is used to keep track of root-level de-serializers. Protected ConcurrentHashMap> _rootDeserializers It is also a configuration object that is used to define the basic global settings for the serialization process. Protected SerializationConfig _serializationConfig It is a Set that defines the set of module types that have been registered. ![]() Value: Type that has annotations to "mix in" Key: Type to receive additional annotations. It is a mapping that is used to define a way of applying mix-in annotations. It is used to access the currently active per-type configuration overrides. ![]() Protected ConfigOverrides _propertyOverrides It is a provider that is used for injecting the values in de-serialized POJOs. Protected InjectableValues _injectableValues In order to create an instance of JsonParser and JsonGenerator, JsonFactory is used. It is a configuration object which is used for defining the basic global settings for the de-serialization process. Protected DeserializationConfig _deserializationConfig It is a blueprint context object that is stored for allowing custom sub-classes. Protected DefaultDeserializationContext _deserializationContext Now, let's understand the fields, constructors, and methods of ObjectMapper class: Fields of ObjectMapper Class In order to specify the kind of types, enumerations are used with the enableDefaultTyping() method. It is a customized TypeResolverBuilder class that is used to get the type resolver builders, which we can use with "default typing". The following table defines the classes that extend the ObjectMapper class or, can say, nested classes of ObjectMapper class. Public class ObjectMapper extends ObjectCodec implements Versioned, Serializable ![]()
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