On 19 May 2011 01:55, David Nolen <dnolen.li...@gmail.com> wrote: > On Tue, May 17, 2011 at 5:52 PM, jlk <lachlan.kana...@gmail.com> wrote: >> >> (proxy2 [String] >> AProtocol? >> (theseBehaveAsStringsWithThisAdded [] ...) >> >> leaving regular Strings unaffected? > > The problem is that Java is inherently and early-bound design. It's > difficult to do efficient composition a la Objective-C where you can just > forward a method to some other object. > JDK 7 introduced invokeDynamic which could possibly help w/ this issue but > sadly there is no hook through the Java language. Perhaps Clojure could > provide such a hook, but this seems very JDK 7 centric. > David > > -- > 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
Thank you all for the suggestions. Jonathan pretty much hit the nail on the head with what I was looking to do - I didn't know you could use the interfaces generated by protocols in a proxy statement like that, very handy! String was meant to be an innocuous example, but it saved my next 'why isn't this working' question :) A further example of this proxy method not working would be trying to add methods to a clojure.lang.PersistentVector. It doesn't seem to have an <init> ?? Similarly, list is a problem. The proxy method works when you provide a value, but PersistentList$EmptyList does not. It seems to work nicely with clojure.lang.PersistentArrayMap, so this kind of thing works (.dosomething (proxy [clojure.lang.PersistentArrayMap user.A] [] (dosomething [] (println (:akey this))))) -> nil (.dosomething (proxy [clojure.lang.PersistentArrayMap user.A] [(into-array Object [:akey :aval])] (dosomething [] (println (:akey this))))) -> :aval ahh corners! - Lachlan -- J Lachlan Kanaley M 0413 191 194 E lachlan.kana...@gmail.com -- 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
