I don’t have a ton of experience with gen-class, but I think you need to tell it to expose the superclass methods you want to call using :exposes-methods, as described in http://stackoverflow.com/questions/9060127/how-to-invoke-superclass-method-in-a-clojure-gen-class-method
In case it is of any use, here is an example of where I successfully subclassed a Java class from an external library and called some superclass methods: https://github.com/brunchboy/afterglow-max/blob/master/src/afterglow/max/Var.clj On Wednesday, December 23, 2015 at 3:23:41 AM UTC-6, Kurt Sys wrote: > > When using gen-class and arity-overloaded methods of a superclass seems > not very obvious, or I am missing something... > > There's a (java) superclass 'some.Superclass' (which is from a library, so > I can't change this one): > > public abstract class Superclass { > public void method() { > } > > public void method(Object something) { > this.method(); > // other logic > } > } > > > I want to extend that base (abstract) class in clojure, using gen-class > (since the class needs to accessible as a normal Java class). So the first > thing I did was: > > (ns my.namespace > (:gen-class > :name "my.namespace.ArityTest" > :extends some.Superclass > :prefix "some-") > ) > > (defn some-method > [this] > (println "1-arity")) > > However, this doesn't work: 'method' is arity-overloaded, when calling > new ArityTest().method(new Object()) > > I get a ArityException, wrong number of arguments (2). I suppose this is > because I override 'method', so I have to override all arities? I'd like to > have the 1-arity version to call it's superclass method, and I seem to fail > at that. The last attempt is this: get the method of the superclass and > call that method on 'this': > > (ns be.admb.kbf.vertx.shell.test > (:gen-class > :name "my.namespace.ArityTest" > :extends some.Superclass > :prefix "some-") > ) > > > (defn some-method > ([this] > (println "1-arity")) > ([this o] > (.invoke (-> this > (.getClass) > (.getSuperclass) > (.getMethod "method" > (into-array Class [java.lang.Object]))) > this (into-array Object [o])) > )) > > This fails: it calls the overriden method, not the superclass' method... > (and the method keeps on calling itself). > > The question: how do I override only 1 method of an arity-overloaded > method of a superclass in Clojure (using gen-class to generate a Java > class)? > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
