[rules-users] syntax question

[Anstis, Michael (M.)]

Hi Bruce,
 
>From my experience (with 3.1-M1) you can reference bound Facts/Columns
in subsequent patterns; like:-
 
$m : Manufacturer ( name == "Honda" )
$c : Car ( manufacturer == $m )
$c : Customer ( cars contains $c, age > 18 )
 
$cars.contains("Honda") requires an eval statement as your requirement
is equivalent to "Customer ( cars.contains("Honda") )" which does not
use a zero-parameter field accessor and is not compliant with the Java
Beans specification).
 
With kind regards,
 
Mike
 


________________________________

	From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Bruce leroy
	Sent: 23 March 2007 18:20
	To: rules-users at lists.jboss.org
	Subject: [rules-users] syntax question
	
	
	Hi,
	
	I have a question regarding rules syntax particularly with left
hand side. Suppose I have the following condition ..
	
	when 
	   Customer ( $cars : cars, age > 18 )
	...
	
	How can I use the bind variable "$cars" in subsequent statements
without using eval(), like so ... 
	
	when 
	  Customer ( $cars : cars,  age > 18 )
	  eval( $cars.contains( "Honda" ) )
	....
	
	
	Basically I would like to know what the alternatives for doing
something like so this without having to use eval function. I know this
might not be the best example for this question, but please I'm just
learning this system right now. 
	
	
	Thanks in advance,
	Bruce.
	   
	

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20070326/877d9a8a/attachment.html