Java interop: "Can't call public method of non-public class"

[Ben Smith-Mannschott]

Simplified, from a more complex example:

abstract class Bytes {

    public toHexString() { return "..."; }

    Bytes { }

}

public class Hash extends Bytes {

    public Hash() { super(); }

}

This works in Java:

    new Hash().toHexString();

This fails in Clojure:

    (.toHexString (Hash.))

IllegalArgumentException Can't call public method of non-public class: public final java.lang.String at.gv.brz.bjuvj.hashpass.Bytes.toHexString()  clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:88)

Bug?

// ben

[Marko Topolnik]

I'd say it's a bug. You are invoking a public class's method, which happens to be inherited from a package-private class. Clojure's reflective code accesses the superclass method directly so there's no distinction between direct invocation and invocation through inheritance. 

If you are interseted in a workaround, type-hinting the code will work (my guess).

[Vladimir Tsichevski]

I think not. But upgrading to clojure 1.5 will do.

[Ben Smith-Mannschott]

I found the following work-around since I have access to the java code I am calling:

I had the package-visible ABC Bytes implement a (public) interface declaring the toHexString method. This placated the compiler. 

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