Use a Class for a generic type?
is there a way to for example do
In case this is xy problem: I have a class called DataObject for storing some extra data on things, and it has a generic type for what type of data it's storing. There's another class called DataMap that takes its own generic type and extends DataObject with a HashMap<DataObject<T>, DataObject<?>>. I'm then serializing it to json with gson as my method of storing it in a file, but I need a custom deserializer for it, and I'm getting errors for it not being able to convert HashMap<DataObject<?>, DataObject<?>> to HashMap<DataObject<T>, DataObject<T>>. Storing the class name in the json is my current idea for a workaround.
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Yeah, using something like this is usually a bad idea
What are you trying to store?
Not exactly sure yet, probably mostly text to then get stuff from registries, plus some numbers
yeah, but like, what structure?
This has a graph feeling to it?
What's with the DataObject? What's it's goal etc
its just a container for data of whatever type, supposed to be a system to json. Specifically I want to be able to store a couple different random options(for example a random monster and random loot)
so basically to save rng dependant options in a file
ok
yeah, your only option in this case is to store the type in the json, or in the application, and do a hard cast from Map<?,?> to the one you need
Although I'm not even sure that would work
In cases like this it's usually just easier to read a specific type from a file than to come up with some magic generic incantation
ok, I'll scrap this whole system and try to come up with something else, maybe just accept that keys have to be Strings and use json instead of making my own system
yeah, that seems like a good idea
I mean, you can get a Map<String, Monster> back if you want
That's very easily doable
With TypeReference I believe in Gson
ok ty
TypeToken
Try the simplest solution first, and if the bit of repetition still bothers you, then look for a fancier way to do it 🙂
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