Thank you, that worked!
The case in which I am using this is actually more complex than the
small example I have shown.
I am integrating Jess with the JADE framework. JADE includes an example
of how to use Jess, which comes with some code for managing the template
of an ACL message (agent stuff). That code is expecting a string in a
particular slot, which is why I was trying to convert a certain fact to
a string. Otherwise I would have to change the code... May be that is a
good thing to do!
Henrique
[EMAIL PROTECTED] wrote:
I think Henrique Lopes Cardoso wrote:
(defrule r1
?x <- (foo)
=>
(bind ?string (implode$ ?x)) ;; IS THERE A WAY OF DOING THIS?
?x is a jess.Fact object. You can call any of the methods of jess.Fact
on it -- including toString() and toStringWithParens(), one of which
surely does what you want.
But I think you need to step back a little and look at your design; in
particular, the way in which you're structuring your data. For
example, why is it important that the "foo" part of
(foo a b c)
be including in your string -- since, given the "foo" pattern, it's
already known? Why not just
...
?x <- (foo $?data)
=>
(bind ?string (implode $?data))
...
Now, you say that "?string" is just going to be passed to a
Userfunction implemented in Java. Why not just pass "?data" to that
Userfunction (or ?x, if that's what you really want?) Why this
preprocessing step?
Any time you feel like you're fighting Jess (or any tool) to achieve a
certain effect, ask yourself if the problem isn't just that the tool
is designed to make it easy to do things some other way, and consider
if that other way would work for you.
---------------------------------------------------------
Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://herzberg.ca.sandia.gov
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