Re: Testing for existence of Java library?
You could attempt to load one of it's classes and catch the resulting exception if it's missing. Based on whether that exception is raised you'll know whether it's available. cheers, barneyb On Fri, Aug 15, 2008 at 2:19 PM, Pete Ruckelshaus <[EMAIL PROTECTED]> wrote: > Hopefully simple question. How would I test for the existence of a specific > Java library (specifically, iCal4j)? > > Thanks > > Pete > > > ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:311058 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Testing for existence of Java library?
> Hopefully simple question. How would I test for the > existence of a specific Java library (specifically, iCal4j)? Use an exception handler around your CreateObject call. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ Fig Leaf Software provides the highest caliber vendor-authorized instruction at our training centers in Washington DC, Atlanta, Chicago, Baltimore, Northern Virginia, or on-site at your location. Visit http://training.figleaf.com/ for more information! ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:311059 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Testing for existence of Java library?
You mean, like check to see if the jar exists? I've never found a way to do it without simply trying to create an instance of it in a try catch block. ~Brad - Original Message - From: "Pete Ruckelshaus" <[EMAIL PROTECTED]> To: "CF-Talk" Sent: Friday, August 15, 2008 4:19 PM Subject: Testing for existence of Java library? > Hopefully simple question. How would I test for the existence of a > specific > Java library (specifically, iCal4j)? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:311060 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Testing for existence of Java library?
I don't know but maybe something like this
Try {
Var test = new Ext.GridPane();
} catch (e) {
// Library not found
}
I suppose you don't think like that?
--
Senior Coldfusion Developer
Aegeon Pty. Ltd.
www.aegeon.com.au
Phone: +613 9015 8628
Mobile: 0404 998 273
-Original Message-
From: Pete Ruckelshaus [mailto:[EMAIL PROTECTED]
Sent: Saturday, 16 August 2008 7:19 AM
To: CF-Talk
Subject: Testing for existence of Java library?
Hopefully simple question. How would I test for the existence of a specific
Java library (specifically, iCal4j)?
Thanks
Pete
~|
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Re: Testing for existence of Java library?
Not when someone asks a Java question and not a JavaScript question.
On Sat, Aug 16, 2008 at 12:21 PM, Andrew Scott
<[EMAIL PROTECTED]> wrote:
> I don't know but maybe something like this
>
> Try {
>Var test = new Ext.GridPane();
> } catch (e) {
>// Library not found
> }
>
> I suppose you don't think like that?
--
mxAjax / CFAjax docs and other useful articles:
http://www.bifrost.com.au/blog/
~|
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RE: Testing for existence of Java library?
Pseudo code dude..
The solution is the same is it not?
--
Senior Coldfusion Developer
Aegeon Pty. Ltd.
www.aegeon.com.au
Phone: +613 9015 8628
Mobile: 0404 998 273
-Original Message-
From: James Holmes [mailto:[EMAIL PROTECTED]
Sent: Saturday, 16 August 2008 4:08 PM
To: CF-Talk
Subject: Re: Testing for existence of Java library?
Not when someone asks a Java question and not a JavaScript question.
On Sat, Aug 16, 2008 at 12:21 PM, Andrew Scott
<[EMAIL PROTECTED]> wrote:
> I don't know but maybe something like this
>
> Try {
>Var test = new Ext.GridPane();
> } catch (e) {
>// Library not found
> }
>
> I suppose you don't think like that?
--
mxAjax / CFAjax docs and other useful articles:
http://www.bifrost.com.au/blog/
~|
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Re: Testing for existence of Java library?
On Fri, Aug 15, 2008 at 3:21 PM, Barney Boisvert wrote:
> You could attempt to load one of it's classes and catch the resulting
> exception if it's missing. Based on whether that exception is raised
> you'll know whether it's available.
Yes, that sounds like a good way to do it.
FWIW, when I've been utilizing java libraries that I may load through
a classloader, I try to abstract the object creation, so I can switch
between classloaded classes or classes already loaded in the
classpath.
I've generally used logic of the type "if a classloader is passed in,
use it, otherwise, use plain old createObject("java"...", vs. just
trying and catching, which sounds like a better approach, perhaps.
I've actually got some iCal4j specific code, if you're curious.
~Den
--
Few of the many wise apothegms which have been uttered have prevented
a single foolish action.
Thomas B. Macaulay
~|
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