[QUESTION] Alternatives of jackson's `JsonSerialize.contentAs` and `writeValueAsView`

[blonded04]

Hello, I'm migrating a big spring5 project from jackson to fastjson2, and I'd like to ask how can I do the following:

1. Specify, that Map<String, MyClass> field's MyClass'es values must be serialized as a MyClass, not as any of it's inheritors. In jackson I can do @JsonSerialize(contentAs = MyClass.class)
2. Pass a flag custom flag to JSONWriter when writing to it, that I can further check and if it's present I use custom serialization (for example, sometime I'd like to serialize String password not as it's value, but as a *** when some flag was set to JSONWriter

Are there built-in ways to do it? If no, are there any workarounds?

[blonded04]

I'm also very interested in jackson's converter = for JsonSerialize and JsonDeserialize, may they be implemented with default serializeUsing =?

[wenshao]

fastjson2 can recognize Jackson's Annotation, but currently does not support contentAs. I will add this feature in version 2.0.56. JSONField#serializeUsing and JSONField#deserializeUsing can specify custom serializer and deserializer implementations. You can also specify custom serializers and deserializers by calling JSON#register.

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.56

Please use the new version 2.0.56, which already supports JSONField.contentAs and is also compatible with Jackson's JsonSerialize.contentAs