Deserializing ImmutableList using Gson

Question

I\'m using quite a few immutable collections and I\'m curious how to deserialize them using Gson. As nobody answered and I\'ve found the solution myself, I\'m simplifying th

Answer 1

@maaartinus already covered the second question, so I'll post a complementary Guava-based solution to the first question which doesn't require ParametrizedTypeImpl

public final class ImmutableListDeserializer implements JsonDeserializer> {
  @Override
  public ImmutableList deserialize(final JsonElement json, final Type type,
                                      final JsonDeserializationContext context)
      throws JsonParseException {
    final Type[] typeArguments = ((ParameterizedType) type).getActualTypeArguments();
    final Type parameterizedType = listOf(typeArguments[0]).getType();
    final List list = context.deserialize(json, parameterizedType);
    return ImmutableList.copyOf(list);
  }

  private static  TypeToken> listOf(final Type arg) {
    return new TypeToken>() {}
        .where(new TypeParameter() {}, (TypeToken) TypeToken.of(arg));   
  }
}