It would be helpful, I think, if you told us what you wanted to do in
terms of business logic, rather than as "how do I do X in Jess",
because the questions you really need answered are about the proper
way to use Jess itself.
In this case, note that if you used Rete.assertString() instead of
executeCommand() to assert the fact, then that method returns the
jess.Fact object itself. You can then get the individual slot values
from that Fact object using its getSlotValue() method. But it's a
mystery to me why you want to do this -- you've just asserted the
fact, so why would you want to look at it?
The proper way to find facts that are created as a result of running
some rules is to use a defquery, as detailed in the "TekMart" section
of the book.
On Mar 20, 2007, at 4:34 AM, ricktee wrote:
Good day,
Im using java to load the "cardio.clp" file then java ex-commend a
string to
create ththe following fact in jess.
(program-cardio
(ident cardio-low)
(cond-inte 40) (cond-dura 6)
(impr-inte 70) (impr-dura 20)
(main-inte 70) (main-dura 1)))
I read in the "Jess in action" book (p311) there is a
"findFactByFact()"
method, but I dont know how to use it. Can you please help me? How
do I get
the (program-cardio) fact out of Jess? Is ValueVector the correct
format to
store the fact? Or should I use vectors?
And is there a way to auto format the retrieved fact in a array for
easy
using? Or something similar? Like-
String [] [] cardio_program = {
("ident", "cardio-low"),
("cond-inte", "40"), ("cond-dura", "6"),
("impr-inte", "70"), ("impr-dura", "20"),
("main-inte", "70"), ("main-dura", "1") }
The "cond-inte 40" stands for "conditioning intensity at 40%" which Im
suppose to use it for some java caculation.
Thank you very much for your help
rick
Below is the scale down program
http://www.geocities.com/t_web_design/TestFrame.java
http://www.geocities.com/t_web_design/cardio.txt
**********************************************************************
******
//TestFrame.java
import jess.*;
import java.util.*;
public class TestFrame{
private static Rete engine;
public static void main(String[] args)
{
String assert_fact = "(assert (program-cardio (ident cardio-low)
(cond-inte
40) (cond-dura 6)(impr-inte 70) (impr-dura 20)(main-inte 70)
(main-dura
1)) )";
try
{
engine = new Rete();
engine.reset();
engine.batch("cardio.clp");
engine.reset();
engine.executeCommand(assert_fact);
engine.run();
ValueVector get_fact = engine.findFactByFact("program-cardio");
Vector temp =
get_fact.factValue(engine.getGlobalContext());
}
catch (JessException ex)
{ System.err.println("ERROR"); }
} //close main
}
**********************************************************************
*********
;; cardio.clp
;;;; template for a cardio exercise program ;;;;
(deftemplate program-cardio
(slot ident)
(slot cond-inte)
(slot cond-dura)
(slot impr-inte)
(slot impr-dura)
(slot main-inte)
(slot main-dura)
(slot explanation) );;close
;;;; rule , to say the fact has been created by Java ;;;;;;;;
(defrule access-by-java
(program-cardio (ident cardio-low))
=>
(printout t "The jess file has been accessed by Java, (program-
cardio) fact
created" crlf ) );;close
--
View this message in context: http://www.nabble.com/Retrieve-Fact-
from-Java-tf3432213.html#a9567941
Sent from the Jess mailing list archive at Nabble.com.
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