[rules-users] LHS Dao Calls

[Sanjay Singh - s0singh]

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 at lists.jboss.org
[mailto:rules-users-bounces at 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 at 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
  Office: +55 11 3124-6000
  Mobile: +55 11 9218-4151 
  JBoss, a division of Red Hat @ www.jboss.com 



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