Re: Catching ClassNotFoundException.
Hi, Am 16.12.2010 um 04:16 schrieb Nicolas Buduroi: So we could always use RT/classForName to detect what classes are available. Do you think the extend-type thrown exception can possibly be fixed or is it a fundamental limitation? I think the problem here is „when“ not „where.“ The „extend-type“ exception is thrown when the expression is compiled because the compiler tries to resolve the class. But the try catch is not in effect at that time: it just gets compiled! Using RT/classForName moves the class resolution to the runtime and everything works fine. You could do something like (try (load file/with/extend-type) (catch ClassNotFoundException uhOh ...)). Sincerely Meikel -- 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
Re: Catching ClassNotFoundException.
Cool, that explain everything. Thanks On Dec 16, 4:40 am, Meikel Brandmeyer m...@kotka.de wrote: Hi, Am 16.12.2010 um 04:16 schrieb Nicolas Buduroi: So we could always use RT/classForName to detect what classes are available. Do you think the extend-type thrown exception can possibly be fixed or is it a fundamental limitation? I think the problem here is „when“ not „where.“ The „extend-type“ exception is thrown when the expression is compiled because the compiler tries to resolve the class. But the try catch is not in effect at that time: it just gets compiled! Using RT/classForName moves the class resolution to the runtime and everything works fine. You could do something like (try (load file/with/extend-type) (catch ClassNotFoundException uhOh ...)). Sincerely Meikel -- 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
Catching ClassNotFoundException.
Hi, is there a way of catching ClassNotFoundException? Using try..catch doesn't work! Thanks -- 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
Re: Catching ClassNotFoundException.
Can you post an example? (try (throw (ClassNotFoundException. What makes you say that?)) (catch ClassNotFoundException e (println (.getMessage e Hi, is there a way of catching ClassNotFoundException? Using try..catch doesn't work! Thanks -- 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 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
Re: Catching ClassNotFoundException.
Yeah, while doing more testing it seems to depend from where the ClassNotFoundException is thrown. What I was trying to do at first is to call extend-type on a Java class only if it exists. Surrounding extend-type by a try..catch clause doesn't work here. So I tried to simply type: user (try org.postgresql.PGConnection (catch ClassNotFoundException e :catched)) ; Evaluation aborted. And, as you see, the try..catch didn't work either. But I just found out that when using Clojure internal classForName method it can be catched: user (try (clojure.lang.RT/classForName org.postgresql.PGConnection ) (catch ClassNotFoundException e :catched)) :catched So we could always use RT/classForName to detect what classes are available. Do you think the extend-type thrown exception can possibly be fixed or is it a fundamental limitation? On Dec 15, 9:27 pm, Stuart Halloway stuart.hallo...@gmail.com wrote: Can you post an example? (try (throw (ClassNotFoundException. What makes you say that?)) (catch ClassNotFoundException e (println (.getMessage e Hi, is there a way of catching ClassNotFoundException? Using try..catch doesn't work! Thanks -- 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 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
