Parenthesis call the thing they wrap as a function. You have getConnection wrapped in a redundant set of parenthesis, so the return value of getConnection is being called. It is not a function, but it is a ConnectionCustom, so you get your error.
Some hints to make clojure code more readable: classes should be CamelCase, methods should be camelCase, functions should be kabob-case. parens should be separated by a preceding item by a space - (f (g x)) - g and x are not args to f, (g x) is the arg to f no line should contain only parens On Friday, December 6, 2013 5:08:23 AM UTC-8, Avinash Dongre wrote: > > Hi > I have our own jdbc driver when I am trying to use clojure java.jdbc it is > giving me error like below > > Exception in thread "main" java.lang.ClassCastException: > a.b.my_custom_driver cannot be cast to clojure.lang.IFn > at clojure.gemfireXD.jdbc$createStatement.invoke(client.clj:13) > at clojure.gemfireXD.jdbc$eval13.invoke(client.clj:18) > at clojure.lang.Compiler.eval(Compiler.java:6619) > at clojure.lang.Compiler.load(Compiler.java:7064) > at clojure.lang.Compiler.loadFile(Compiler.java:7020) > at clojure.main$load_script.invoke(main.clj:294) > at clojure.main$script_opt.invoke(main.clj:356) > at clojure.main$main.doInvoke(main.clj:440) > at clojure.lang.RestFn.invoke(RestFn.java:408) > at clojure.lang.Var.invoke(Var.java:415) > at clojure.lang.AFn.applyToHelper(AFn.java:161) > at clojure.lang.Var.applyTo(Var.java:532) > at clojure.main.main(main.java:37) > > > When I tried following > > > > (ns clojure.custom.jdbc > (:import [java.sql Connection DriverManager]) > (:require [clojure.string :as clojure-string])) > > (defn getConnecton > [url] > (clojure.lang.RT/loadClassForName "custom.url.ClientDriver") > (DriverManager/getConnection url)) > > (defn createStatement > [db] > (^Statement (.createStatement db) > )) > > > (createStatement((getConnecton "jdbc:mydbServer://localhost:1527/"))) > > Exception in thread "main" java.lang.ClassCastException: > my.custom.implementation.internal.ConnectionCustom cannot be cast to > clojure.lang.IFn > at clojure.gemfireXD.jdbc$eval13.invoke(client.clj:16) > at clojure.lang.Compiler.eval(Compiler.java:6619) > at clojure.lang.Compiler.load(Compiler.java:7064) > at clojure.lang.Compiler.loadFile(Compiler.java:7020) > at clojure.main$load_script.invoke(main.clj:294) > at clojure.main$script_opt.invoke(main.clj:356) > at clojure.main$main.doInvoke(main.clj:440) > at clojure.lang.RestFn.invoke(RestFn.java:408) > at clojure.lang.Var.invoke(Var.java:415) > at clojure.lang.AFn.applyToHelper(AFn.java:161) > at clojure.lang.Var.applyTo(Var.java:532) > at clojure.main.main(main.java:37) > > > What I am missing here. > -- -- 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/groups/opt_out.
