In general, the right way to do things in a rule- based system is to
match the facts in a rule, and allow the rule to fire however many
times it needs to to complete its task; i.e., instead of a while
loop, consider a rule that fires once for each fact.
But if you want to use a while loop, then use a query to find all the
matching facts at once. See http://herzberg.ca.sandia.gov/docs/70/
queries.html .
By the way, I don't know what's up with your Userfunction. The
variable "?m" will contain the jess.Fact object itself; the two
method calls you show in the call() method seem as though you feel
you need to search for this object, but you don't; it's already in
the argument to the function.
On Feb 25, 2007, at 2:34 PM, Kenan Bilic wrote:
Hello. I have some problems with Jess Facts. I developed a small
Ontologie in Protege. With the function mapclass I connect these
with Jess. So far so well, now I want to send each Fact to Java. I
have e.g. 10 Facts, and I would like to send these to Java. Is
there a possibility facts in one while loop successively to send.
I have made an example with one fact and implemented one
Userfunction in Java. With this I call a (send ?m) in Jess.
Jess:
?m <- (ACLMessage (sender ?n)...............)
(send ?m)
Java:
public String getName() {
return ("send");
}
public Value call(ValueVector vv, Context context)
throws JessException {
if (vv.get(1).type() == RU.VARIABLE) {
vv.get(1).factValue(context).getFactId());
vv = context.getEngine().findFactByID(vv.get(1)
.factValue
(context)
.getFactId());
}
This work with one Fact. How can I send now 10 Facts?
Each Fact has an ID. But I can not read them in Jess. I would like
to use an while loop like this.
i=0;
while (i !=9){
send fact_by_id(i);
i++
}
Is this possible in Jess.
---------------------------------------------------------
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://www.jessrules.com
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