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David IsaacSubject: External Java functions with built-in XQuery processor = implementation not found
Author: David Isaac
Date: 26 Sep 2008 01:56 PM
Hello-
Can anyone tell me how to access something like java.math.BigInteger.gcd() using the built-in XQuery processor? It works fine when I use the DataDirect processor, but when I use the built-in processor for debugging I get an "implementation not found" error.

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(Deleted User) Subject: External Java functions with built-in XQuery processor = implementation not found
Author: (Deleted User)
Date: 01 Oct 2008 03:18 PM
Hi David,
the built-in XQuery processor only supports instance methods only when the class has a default constructor (i.e. with no arguments), that unfortunately BigInteger doesn't provide. You can workaround the limitation by creating a custom Java class with a static method with two arguments that internally builds the BigInteger using the first argument and then calls the gcd() method using the second one.

Hope this helps,
Alberto

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David IsaacSubject: External Java functions with built-in XQuery processor = implementation not found
Author: David Isaac
Date: 01 Oct 2008 05:43 PM
Well, that explains it, but I must say it is very inconvenient to wrap every Java class without default constructors that we want to use.

Any plans for Stylus to make the built-in processor work like SAXON or the DataDirect engine in this regard? Right now, we can either debug or use the core Java classes, but not both at once.

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(Deleted User) Subject: External Java functions with built-in XQuery processor = implementation not found
Author: (Deleted User)
Date: 02 Oct 2008 11:01 AM
Hi David,
you should be able to debug the SAXON processor; is there something not working in that area?

Alberto

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David IsaacSubject: External Java functions with built-in XQuery processor = implementation not found
Author: David Isaac
Date: 02 Oct 2008 04:58 PM
Thanks, Alberto! I thought I had read that the debugger worked only with the built-in processor.

FYI, I think all the <symbol unknown> values in the watch window left over from prior debugging reinforced my belief that the debugger was not working with SAXON. It would be nice if there was a clean way to delete variables from the watch window. Select, backspace, enter, and restart Studio seems to be the only way to clear a watch variable, and even then it doesn't always delete the selected variable and sometimes gives a "pure virtual function call" error and hangs Studio.

For now, I am happily debugging with SAXON!

 
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