RE: AW: JESS: How to match Pattern in Facts
Hi, I am back, I tried out the store/fetch. BUT, it return me only the latest fired facts. Why? I need both (any) facts which is fired. Is like the variable (fact-in-java) is overwritten. How can I get the activated facts out, I mean all the fired facts? Please advice. merlinMain.r.executeCommand((deftemplate adv-attributes + (slot id) + (multislot attribs))); merlinMain.r.executeCommand((defrule show-adv-attributes + ?fact - (adv-attributes (id ?id) (attribs ?attribs)) + = + (store fact-in-java ?attribs) + (printout t \-\ crlf) + (printout t \Fact-id=\ ?fact crlf) + (printout t \id=\ ?id crlf) + (printout t \attribs=\ ?attribs crlf))); merlinMain.r.reset(); merlinMain.r.executeCommand((assert (adv-attributes (id 1) (attribs low-budget; merlinMain.r.executeCommand((assert (adv-attributes (id 2) (attribs control-message-frequency; merlinMain.r.run(); String str1 = merlinMain.r.fetch(fact-in-java).stringValue(merlinMain.r.getGlobalContext()); System.out.println(--+str1+--); __ Do you Yahoo!? New and Improved Yahoo! Mail - 100MB free storage! http://promotions.yahoo.com/new_mail To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED]
Re: AW: JESS: How to match Pattern in Facts
I think calvin pevee wrote: Hi, I am back, I tried out the store/fetch. BUT, it return me only the latest fired facts. Why? I need both (any) facts which is fired. Is like the variable (fact-in-java) is overwritten. How can I get the activated facts out, I mean all the fired facts? Please advice. store/fetch is just a thin layer over a HashMap. You put something in, whatever was previously in there under the same key goes away. Remember that from the Jess language, you have full access to all of Java. Your mainline Java code could store() an ArrayList under the given key, and then your rule could, instead of calling (store), use (fetch) to get that ArrayList, and call add to install more results. This way all the results would accumulate in the ArrayList. Of course, you could use a Set, or a Map, or whatever you want. - Ernest Friedman-Hill Advanced Software Research Phone: (925) 294-2154 Sandia National LabsFAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED]
RE: AW: JESS: How to match Pattern in Facts [details]
I think that Calvin Pevee wrote:
I tried out the store/fetch. BUT, it return me only the latest fired
facts.
Hi Calvin,
Ernest cut to the heart of the matter already, but in your code below, note
that every time the rule fires, the value of the stored variable
fact-in-java gets replaced, overwriting the previous value. You should
probably accumulate them in some sort of resizable collection like a Vector
or ArrayList.
r.executeCommand((defrule show-adv-attributes
+ ?fact - (adv-attributes (id ?id)(attribs
?attribs))
+ = + (store fact-in-java ?attribs)
How can I get the activated facts out, I mean all the fired facts?
It pays to be precise here. Do you mean How do I get all the a)
activations; b) fact references; or c) attribute multivariables?
If you just want a collection of fact references that caused the rule to
fire, then you could rewrite your code (I've shortened the redirections for
clarity) something like this:
import jess.*;
import java.util.Vector;
public class TestBug3 {
public static void main(String[] args) {
TestBug3 tb = new TestBug3();
tb.run();
}
private Rete r;
public TestBug3() {
this.r = new Rete();
}
public void run() {
// Catch JessException!
try {
// Like Ernest suggested... add a resizable container.
Vector factRefs = new Vector();
// Store that reference in Jess
r.store(FACT-REFS, factRefs);
// Execute your commands
r.executeCommand((deftemplate adv-attributes + (slot id)
+ (multislot attribs)));
r.executeCommand((defrule show-adv-attributes
+ ?fact - (adv-attributes (id ?id)(attribs
?attribs))
+ = + (bind ?fact-refs (fetch FACT-REFS))
+ (bind ?ref (?fact getFactId))
+ (?fact-refs add ?ref)
+ (printout t \-\ crlf)
+ (printout t \Fact-id=\ ?fact crlf)
+ (printout t \id=\ ?id crlf)
+ (printout t \attribs=\ ?attribs crlf crlf)));
r.reset();
r.executeCommand((assert (adv-attributes (id 1) (attribs
low-budget;
r.executeCommand((assert (adv-attributes (id 2) (attribs
control-message-frequency;
r.run();
// Retrieve the stored fact refs - this may be redundant, but
you get the idea.
Value v = r.fetch(FACT-REFS);
Vector newRefs = (Vector)
v.externalAddressValue(r.getGlobalContext());
int length = newRefs.size();
for (int i = 0; i length; i++) {
System.out.println(fact-ref: + newRefs.get(i));
}
// Make sure that you are catching/handling JessException!
} catch (JessException jex) {
jex.printStackTrace(System.err);
}
}
}
This produces...
-
Fact-id=Fact-2
id=2
attribs=control-message-frequency
-
Fact-id=Fact-1
id=1
attribs=low-budget
fact-ref:2
fact-ref:1
You can do anything you want with the facts now that you have a list of
their references.
Hope this helps.
Cheers,
-Jason
Jason Morris
Morris Technical Solutions
[EMAIL PROTECTED]
www.morristechnicalsolutions.com
fax/phone: 503.692.1088
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