Re: JESS: Problem in Modfying a java Object

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Re: JESS: Problem in Modfying a java Object

Friedman-Hill, Ernest
Read all of section 5.3 in the Jess manual, especially sections 5.3.3  
and 5.3.4 . This is covered in detail.

http://www.jessrules.com/jess/docs/71/memory.html#shadow_facts


On Apr 3, 2011, at 11:44 AM, chownikhil wrote:

>
> Hello All,
>
> I have an object called Request in java. I am trying to modify the  
> object by
> firing a jess rule but i don't find any changes in the object
>
> Request class:
>
> package proto;
>
> import java.io.*;
>
> public class Request implements Serializable
> {
> public String destination;
> public int passengerAge;
>
> public void setDestination(String dest)
> {
> destination }
>
> public void setPassengerAge(int personAge)
> {
> passengerAge }
>
> public String getDestination()
> {
> return destination;
> }
>
> public int getPassengerAge()
> {
> return passengerAge;
> }
> }
>
> Java code for accessing the jess rules :
>
> final Rete engine
>                        engine.eval("(deftemplate Request (declare
> (from-class proto.Request)))");
>
>                        engine.eval("(deftemplate Proposal (declare
> (from-class proto.Proposal)))");
>
>                        FileReader fp FileReader("C:\\Users\\Venkat\
> \workspace\\nnayuni_contract-net_p5\\src\\SellerRules.clp");
>
> final Context context
> final Jesp parser
>                                        Object result while(!
> result.equals(Funcall.EOF))
> {
> try
> {
> result System.out.println(result);
> }
> catch (JessException e)
> {
> e.printStackTrace();
> }
> }
> try
> {
> Request req Proposal temp Fact f
> f.setSlotValue("passengerAge", new Value(req.getPassengerAge()));
> f.setSlotValue("destination", new Value(req.getDestination()));
> engine.assertFact(f);
> engine.reset();
> engine.run();
> System.out.println(req.getPassengerAge());
> }
>                    catch (JessException e)
>                    {
> e.printStackTrace();
> }
>                    catch (UnreadableException e)
>                    {
> e.printStackTrace();
> }
>
> jess rule :
>
> (defrule welcome-toddlers
>    "Give a special greeting to young children"
>    ?fact <- (Request {passengerAge > 3})
>
> (modify ?fact (passengerAge 14)))
> --
> View this message in context: http://old.nabble.com/Problem-in-Modfying-a-java-Object-tp31306294p31306294.html
> Sent from the Jess mailing list archive at Nabble.com.
>
>
>
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---------------------------------------------------------
Ernest Friedman-Hill
Informatics & Decision Sciences          Phone: (925) 294-2154
Sandia National Labs
PO Box 969, MS 9012                            [hidden email]
Livermore, CA 94550                             http://www.jessrules.com





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