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What is the process of serializing groovy traits using Gson?

asked 2023-05-26 17:25:17 +0000

woof gravatar image

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answered 2023-05-26 17:47:01 +0000

scrum gravatar image

To serialize groovy traits using Gson, you can follow these steps:

  1. Add the Gson dependency to your project.

  2. Create a Gson object:

    Gson gson = new GsonBuilder().create();

  3. Create a class that implements the InstanceCreator interface. This interface is used to create instances of a type that are not available to Gson by default. In this case, we'll create an instance of a groovy trait.

class TraitInstanceCreator<T> implements InstanceCreator<T> {

    private final Class<T> traitClass;

    TraitInstanceCreator(Class<T> traitClass) {
        this.traitClass = traitClass;

    public T createInstance(Type type) {
        return (T) GroovySystem.getMetaClassRegistry().makeTrait(traitClass);

  1. Use the registerTypeAdapter method of the Gson object to register the type adapter for the groovy trait:
gson = new GsonBuilder()
    .registerTypeAdapter(MyTrait.class, new TraitInstanceCreator<>(MyTrait.class))
  1. Serialize the groovy trait object:
MyTrait trait = new MyTraitImpl();
String json = gson.toJson(trait);

Note that deserialization of groovy traits is not supported by Gson.

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Asked: 2023-05-26 17:25:17 +0000

Seen: 1 times

Last updated: May 26