Json deserialization into other class hierarchy using Jackson

by

For this purpose you need to pass additional info in JSON:

@JsonTypeInfo(use=JsonTypeInfo.Id.NAME, 
      include=JsonTypeInfo.As.PROPERTY, property="@type")
class Base {
...
}

Then on serialization it will add @type field:

objectMapper.registerSubtypes(
            new NamedType(ConcreteAAdapter.class, "ConcreteA"),
            new NamedType(ConcreteBAdapter.class, "ConcreteB"),
            new NamedType(ConcreteCAdapter.class, "ConcreteC")
            );

// note, that for lists you need to pass TypeReference explicitly
objectMapper.writerWithType(new TypeReference<List<Base>>() {})
     .writeValueAsString(someList);


    {
      "@type" : "ConcreteA",
      ...
    }

on deserialization it will be: 

    objectMapper.registerSubtypes(
            new NamedType(ConcreteA.class, "ConcreteA"),
            new NamedType(ConcreteB.class, "ConcreteB"),
            new NamedType(ConcreteC.class, "ConcreteC")
            );
    objectMapper.readValue(....)

More info here

More Related Contents:

  1. Get NPE reading null object field when deserializing using Jackson [closed]
  2. How do I use a custom Serializer with Jackson?
  3. Deserializing polymorphic types with Jackson based on the presence of a unique property
  4. Why when a constructor is annotated with @JsonCreator, its arguments must be annotated with @JsonProperty?
  5. Jackson: How to add custom property to the JSON without modifying the POJO
  6. Jackson ObjectMapper – specify serialization order of object properties
  7. Right way to write JSON deserializer in Spring or extend it
  8. Java: Jackson polymorphic JSON deserialization of an object with an interface property?
  9. Jackson – How to process (deserialize) nested JSON?
  10. Jackson Change JsonIgnore Dynamically
  11. How to serialize only the ID of a child with Jackson
  12. Jackson databind enum case insensitive
  13. How to create a custom deserializer in Jackson for a generic type?
  14. What is the JSON View class in Jackson and how does it work?
  15. Ignore missing properties during Jackson JSON deserialization in Java
  16. Jackson JSON library: how to instantiate a class that contains abstract fields
  17. Jackson is not deserialising a generic list that it has serialised
  18. How do I implement TypeAdapterFactory in Gson?
  19. Jackson JSON custom serialization for certain fields
  20. Use class name as root key for JSON Jackson serialization
  21. Deserialize JSON into existing object (Java)
  22. Jackson JSON serialization, recursion avoidance by level defining
  23. Custom Jackson Serializer for a specific type in a particular class
  24. What’s the Jackson deserialization equivalent of @JsonUnwrapped?
  25. Jackson JSON Deserialization: array elements in each line
  26. Make Jackson use a custom deserializer everywhere (for a type which isn’t mine)
  27. Jackson custom annotation for custom value serialization
  28. GSON does not deserialize reference to outer class
  29. Jackson Serialize Instant to Nanosecond Issue
  30. Jackson deserialize based on type

Leave a Comment