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From Philippe Gassmann <>
Subject Re: Loading Java Classes through FlowScript
Date Tue, 10 Jan 2006 13:03:54 GMT
mike rowse a écrit :

>I am not a java programmer generally (although I understand enough
>syntax to be able to get by). I am currently starting to learn how to
>extend cocoon through additional java programming (as I'm going to have
>to wrap some one elses java work to be used through cocoon).
>With this in mind I have created a simple class that I wanted to load
>through flowscript to get going. 
> class TestKlazz {
>   public TestKlazz(){
>	// Tried with this line and without
>	// System.out.println("initialized");
>   }
> }
>This class has been compiled and placed in
>In flowscript I've called this function 
>function testj(){
>	var test_obj = Packages.TestKlazz();
>	cocoon.sendPage("/");
You need to instantiate your class by using

var test_obj = new Packages.TestKlazz();

>Upon navigating to the pipeline that calls this function I get the
>"file:/home/sator/mike/work/hyperpo/trunk/hyperpo/controller/hyperpocontroller.js", line
84: Internal error: attempt to access private/protected field "Class org.mozilla.javascript.NativeJavaClass
can not access a member of class TestKlazz with modifiers "public"".
>I will post the stacktrace if this might help. The machine I'm using is
>running cocoon 2.1.8 and the JVM is version 1.4.2 - 03
>I have tried playing with the class loader setting in web.xml and I have
>tried setting cocoon to run as a paranoid servlet. This is a very
>bizarre error (for such a simple class) and I can't find any mention of
>a similar problem on any of the mailing lists. The kind folks on IRC
>were also baffled (since this is seems to be very frequently done). 
>I'm guessing there is something conceptually missing on my part or a
>dumb gotcha. Any help is greatly appreciated. 
>As an aside. Originally I was trying to run this class from a location
>outside of the usual locations (a need of the project). I was able to
>get the same error adding another directory through setting a
><classpath></classpath> parameter in cocoon.xconf (for the flowscript).
>I stumbled upon this way of adding classes to the flowscript classpath
>through documentation for old versions of cocoon and there is no mention
>as far as I can see in the current documentation. I thought I'd mention
>this because it was the only way I extend the flowscript classpath but
>it seems like a deprecated way of doing things. 
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