Thanks Edson .. i tried with these syntaxes but does not work .. any other clues  ? just to let you know that itemValidationDao is declared global and itemvo is asserted

when

item : ItemVo(itemStatusCode != ItemVo.STATUS_ACTIVE , (itemValidationDao.isValidItemStatus(itemStatusCode)))

Caused by: org.drools.rule.InvalidRulePackage: unknown:15:70 Unexpected token '('

unknown:16:1 mismatched token: [@160,673:676='then',<33>,16:1]; expecting type ')'

unknown:17:29 Unexpected token '"itemStatusCode"'

unknown:18:22 Unexpected token '"Item is cross ref prime"'

when

item : ItemVo(statusCode : itemStatusCode != ItemVo.STATUS_ACTIVE , itemValidationDao.isValidItemStatus(statusCode))

Caused by: org.drools.rule.InvalidRulePackage: unknown:15:70 Unexpected token 'itemValidationDao'

unknown:16:1 mismatched token: [@158,671:674='then',<33>,16:1]; expecting type ')'

unknown:17:29 Unexpected token '"itemStatusCode"'

unknown:18:22 Unexpected token '"Item is cross ref prime"'

 

This also does not seem to work -- i have 3.1.0 M1 version ..

item : ItemVo ( itemStatusCode == ItemVo.STATUS_ACTIVE | == ItemVo.STATUS_DELETE )
while this still works :

item : ItemVo(itemStatusCode == ItemVo.STATUS_INACTIVE) or ItemVo(itemStatusCode == ItemVo.STATUS_DELETE)

---

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Friday, April 06, 2007 10:22 AM
To: Rules Users List
Subject: Re: [rules-users] LHS Dao Calls

   Sunjay,

   Methods called by using the "from" CE are expected to return a collection of VO's, not boolean results. For your case, probably what you want is something like:

ItemVo( statusCode : itemStatusCode != null, (itemValidationDao.isValidItemStatus (statusCode)) )

   A predicate allow you to call a method returning a boolean value and use it as a constraint.

   []s
   Edson

2007/4/5, Sanjay Singh - s0singh <Sanjay.Singh@wal-mart.com>:

Here is a quick test i was trying to do for calling the dao in LHS but it fails ... what am i missing ..

 

global com.itemfile.item.dao.ItemValidationDao itemValidationDao;

global com.itemfile.rules.ValidationErrorMap errors;

rule "Item should have a valid status"

when

ItemVo( statusCode : itemStatusCode != null)

ItemVo( statusCode == true ) from itemValidationDao.isValidItemStatus(statusCode)

then

errors.addValidationError("nullItemStatusCode","Item Status Code is null");

System.out.println("Item Base Defaults Called" + itemValidationDao.isValidItemStatus(statusCode));

System.out.println("Item Status Code is null");

end

Caused by: org.drools.rule.InvalidRulePackage: unknown:32:28 Unexpected token 'itemValidationDao'

isValidItemStatus ()  method returns a boolean and i need to check if thats true than go to the RHS side ....  somehow it does not recognize itemValidationDao in LHS side .. RHS same call works ...  

Can anybody suggest how to call database in LHS ... 

thanks

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  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
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