Question

I would like to cast a clojure Java object (assigned with let*) to another Java class type. Is this possible and if so then how can I do this?

Update:
Since I posted this question I have realised that I do not need to cast in Clojure as it has no concept of an interface, and is more like Ruby duck typing. I only need to cast if I need to know that an object is definitely of a certain type, in which case I get a ClassCastException

Answer 1

There is a cast function to do that in clojure.core:

user> (doc cast)
-------------------------
clojure.core/cast
([c x])
  Throws a ClassCastException if x is not a c, else returns x.

By the way, you shouldn’t use let* directly — it’s just an implementation detail behind let (which is what should be used in user code).