Also, if I understand correctly what you are trying to do, you should probably add a variable name to the PersonDetails fact and use that in the "then" part to assign the discount. See attached.

-----Original Message-----
From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sumeet Karawal
Sent: Wednesday, May 18, 2011 11:47 AM
To: Rules Users List
Subject: Re: [rules-users] Facing Problem in BRL

This is the brl that I have created:

(Embedded image moved to file: pic18001.jpg)

Regards,

Sumeet Karawal

Mailto: sumeet.karawal@tcs.com

From: "Abhay B. Chaware" <Abhay.Chaware@kpitcummins.com>

To: Rules Users List <rules-users@lists.jboss.org>

Date: 05/18/2011 11:42 AM

Subject: Re: [rules-users] Facing Problem in BRL

Sent by: rules-users-bounces@lists.jboss.org

Could you post your rule content here ?

-----Original Message-----

From: rules-users-bounces@lists.jboss.org [

mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Sumeet Karawal

Sent: Wednesday, May 18, 2011 11:38 AM

To: rules-users@lists.jboss.org

Subject: [rules-users] Facing Problem in BRL

Hi,

I am using Drools-Expert. I am having a class "Person" with data members as

age and discount.

I am trying to create a .brl. I have these statements in drools.package

package com.rules;

import com.model.PersonDetails;

and in the example.brl I am providing the details of when and then

conditions

but on execution I am getting the following error :

java.lang.RuntimeException: [4] Unable to expand: PersonDetails( age <

"20" )[6] Unable to expand: PersonDetails fact0 = new

PersonDetails

();[7] Unable to expand: fact0.setDiscount

( 10 );[8] Unable to

expand: insert(fact0 );

It would be helpful is somebody guide me on how execute it.

Also, I am creating the knowledgebase as:

private static KnowledgeBase createKnowledgeBase() {

KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();

builder.add (ResourceFactory.newClassPathResource(

"com/rules/example.brl"),ResourceType.BRL);

if (builder.hasErrors()) {

throw new RuntimeException (builder.getErrors().toString ());

}

KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();

knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ());

return knowledgeBase;}

Thanks & Regards,

Sumeet Karawal

CEG - Open Source Technology Group

Tata Consultancy Services

Ph:- +912267782556

Cell:- +919833236440

Mailto: sumeet.karawal@tcs.com

Website: http://www.tcs.com

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