Re: if() function behavior

hello a.,

i think the current implementation conforms to the spec. the signature 
of the function is "string: if(boolean, string, string)", and its 
behaviour is defined as "Function if evaluates the first parameter as 
boolean, returning the second parameter when true, otherwise the third 
parameter.", see http://www.w3.org/TR/xforms/slice7.html#fn-if
so the string parameters are not evaluated by if(). the xpath engine 
automatically converts the parameters to strings, thus evaluating any 
expression *before* the boolean condition is evaluated.
maybe this behaviour should be changed, but i have no idea how to 
prevent JXPath from evaluating the parameters before calling the function.
regards,
uli.

sano-aPJ5+7zCQ8bR7s880joybQ@xxxxxxxxxxxxxxxx wrote:
> I have a statement in my form like this:
>
> <xforms:setvalue xforms:ref="instance('instance00')/brands/brand3" 
> value="if(string-length('203') &gt; 4,substring('203',5,1),'')"/>
> When executed, I get "java.lang.StringIndexOutOfBoundsException: String 
> index out of range: -1".
> It looks like the "substring('203',5,1)" part is evaluated even if the 
> "string-length('203') &gt; 4" part returns "false". Is this normal 
> behavior?
> I am trying to split a value submitted from a SELECT control - like 
> '204060708' - into values "2", "4", "6"... that I can insert into 
> individual nodes of the instance tree.
> A.
>
>
>
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--
Ulrich Nicolas Lissé



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