Consider a Java method which infers its type by Java class as follows:
public <T> T readJson(Class<T> c) throws IOException {
This allows doing something like this:
Map<String, String> map = foo.readJson(Map.class);
In java it will warn about unchecked cast, but it will work correctly. However in Kotlin, this will not be so easy, one could try using:
foo.readJson(Map::class.java)
However if Map<String, String> will be required, it will not work:
Type inference failed. Expected type mismatch.
required Map<String, String>
found Map<*, *>!
I also tried defining an interface StringMap:
interface StringMap : Map<String, String>
However that does not work either, it will lead to exceptions like this:
Cannot cast ...LinkedTreeMap to ...StringMap
What would be a correct way of doing this?