How do you handle polymorphic types in GSON?

How do you handle polymorphic types in GSON?

Answer:

Explanation:

In GSON, you can handle polymorphic types by using the @JsonAdapter annotation in combination with a custom serializer or deserializer. This allows you to specify how to serialize and deserialize different subtypes of a polymorphic object.

For example:

@JsonAdapter(AnimalAdapter.class)
public class Animal { ... }

public class AnimalAdapter extends TypeAdapter<Animal> {
    @Override
    public void write(JsonWriter out, Animal value) throws IOException {
        // custom serialization logic
    }

    @Override
    public Animal read(JsonReader in) throws IOException {
        // custom deserialization logic
        return null;
    }
}

In this example, the @JsonAdapter annotation is used to associate the AnimalAdapter class with the Animal class. The adapter handles the serialization and deserialization of different animal subtypes.

Reference links:

https://www.javaguides.net/p/top-java-libraries.html