auto-value-gson | AutoValue Extension to add Gson De/Serializer support | JSON Processing library

If your annotated class uses generics, you'll have to modify your static method a little so AutoValue will know how to generate an appropriate adapter. Simply add a TypeToken<?> parameter and pass it to the generated GsonTypeAdapter class. To have support for fields with generic parameters (eg. List<B>) you need to upgrade your Gson dependency to at least 2.8.0, which introduces the helper TypeToken.getParameterized() see Gson Changelog. Note that the types is an array of the Type representations of the given type's generics. If Foo is parameterized as Foo<String, Integer, Boolean>, then the Type array passed in should be an array of {String.class, Integer.class, Boolean.class}.