Initial comments - you need to be sure that you don't get fooled by a sequence of expressions that will resolve ok - IOW, an assignment
a = b;
w/ 'b' in the context should result in 'OK' for an unresolved check even though a isn't in the context to start.
I'm sure that's occurred to someone - I'll read the thread now :)
geir
On Jan 9, 2004, at 12:03 PM, Bill Horsman wrote:
Hi,
I'm successfully using JEXL to evaluate formulae that my users write. It
works well, but the default behaviour is to ignore any variable that is
not defined. I would like it to a) throw an exception and b) provide
structured feedback on what variables were unknown.
For instance, if I define "a = 3" and then evaluate the expression "a +
b" I get the answer "3". What I want is an exception with a method like:
String[] getUnresolvedVariables();
That would give me ["b"] back.
I'm quite happy to code the changes myself, but I just wanted to check whether:
a) this functionality already exists (I've looked but I can't find it)
b) there's a better way of doing this
c) anyone can provide any hints about where to start (I'm confident enough to launch into this unaided, but wise enough to know that I will do it better with a little guidance).
Cheers, Bill Horsman
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