[rules-users] Smart Templates

[ChrisMu]

Agreed, but this was just an example - if the function required something more complicated - say a DB lookup, could it be done?

________________________________

From: Wolfgang Laun-2 [via Drools] [mailto:ml-node+3010275-1108018130-404175 at n3.nabble.com] 
Sent: 01 June 2011 12:40
To: Mullard, Christopher
Subject: Re: [rules-users] Smart Templates


If there are just 2 types (IRDELTA, COMLEASEDELTA) you can add a function that computes this from the 3-letter name.
-W



2011/6/1 ChrisMu <[hidden email]>


	Possibly. Let me try again with what I'm trying to achieve.
	Given this excerpt from a decision table:
	 
	
	 
	Basically I want to be able to specify a template that says 'If Arg0 is a currency, output RiskType IRDELTA (and currency), if Arg0 is a commodity (begins with 'X') then output RiskType COMLEASEDELTA (and commodity).
	 
	When fed with data, this would generate the rules:
	 
	when Arg0 = USD, output RiskType IRDELTA, USD
	when Arg0 = GBP, output RiskType IRDELTA, GBP
	etc
	when Arg0 = XAU, output RiskType COMLEASEDELTA, XAU
	etc
	 
	In this way theRiskType name is inferred from the data when the rules are generated. It can be done by explicitly stating all possible combinations as in the decision table above but that gets tedious quickly. I wanted to have a more general template that could generate all the specific rules instances.
	 
	Does that make more sense?
	 
	Thanks
	Chris
	 

________________________________

	From: Wolfgang Laun-2 [via Drools] [mailto:[hidden email] <http://user/SendEmail.jtp?type=node&node=3010119&i=0> ] 
	Sent: 01 June 2011 11:21
	To: Mullard, Christopher
	Subject: Re: [rules-users] Smart Templates
	
	
	I don't want to confuse you, but have you considered not using templates at all? If you can generate N rules from N objects containing different literals for matching a fact or for updating a fact field, then you can achieve the same thing with a single rule and additional facts containing those literal values.
	
	rule "one 4 all"
	when
	Â Â  Service( $name: name, $value: value )
	Â Â  $sb: ServiceBean( name == $name, value == $value )
	then
	Â Â  # RiskType ... is what?
	Â Â  ...$value..., ...$sb.getType()... 
	end
	
	-W
	
	
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