Re: JESS: Problem in Modfying a java Object

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                            [email protected]
Livermore, CA 94550                             http://www.jessrules.com





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