Thank you Wolfgang, that works brilliantly. I appreciate your thoughts on Parameters and will be doing something along that line as that looks cleaner again - I hadn't gotten up to eliminating magic numbers yet.
Regards, -Trav Travis Smith Analyst Programmer Development Centre BNZ DDI: +644 4746356 (Or Ext 76356) Wolfgang Laun <[email protected]> Sent by: [email protected] 17/02/2011 05:44 a.m. Please respond to Rules Users List <[email protected]> To Rules Users List <[email protected]> cc Subject Re: [rules-users] using "contains" against a List<BigInteger> It's Java, after all... The "contains" operator requires a Collection (or array) and an Object. A plain numeric literal won't result in a BigInteger without you providing a hint. You can write $performance : Performance( calcScore contains (BigInteger.valueOf(6)) ) or dialect "mvel" when $performance : Performance( calcScore contains (6I) ) # capital "i" All of these (and your eval) use magic numbers, so my preferred way of dealing with this would be s.th. like this, using a singleton Parameter fact for this and other values: when Parameter( $bis: bigIntSix ) $performance : Performance( calcScore contains $bis ) -W 2011/2/16 <[email protected]>: > > Hi, > > A newbie question I'm afraid. I've been unsuccessful searching the > mailing-list archive (and google) for this. > > I'm trying to simplify rule-writing for Statistical Analysts to be able to > write rules. I'm hoping to achieve this without resort to DSLR files and a > DSL if possible as we currently need them for nothing else > > One of the situations I have is the following: > -------------------- > when > $performance : Performance( > eval(calcScore.contains(BigInteger.valueOf(6))) > ) > then > [...] > -------------------- > > That works absolutely fine: CustAccPerf being a having several members, > including an ArrayList<BigInteger> called calcScore > > Howwever I'd like to rewrite it like: > -------------------- > when > > $performance : Performance( calcScore contains 6 ) > then > [...] > -------------------- > > Given the support for BigInteger & BigDecimal type comparison, and the > structure of the 'contains' operator, I couldn't see why this wouldn't work. > > If someone could explain this would be excellent - for now I'm gong ahead > with the eval, but from a non-technical usability POV the latter form would > be far preferable: I'd prefer that the users don't have to worry about eval > or BigInteger, and while I realize it's not possible (currently) to > eliminate that altogether, I would like to eliminate as many of the (to > quote) "meaningless tech stuff" questions as possible. > > Alternately if some kind person wants to tell me a better way of structuring > that rule so I can use it as a template, then that'd be welcome also. > > Unfortunately we're dealing with a feed from a 3rd party system so > restructuring the data is not a desirable option. > > Thank you for your time, > -Trav > > Travis Smith > Analyst Programmer > Development Centre > BNZ > > CAUTION - This message may contain privileged and confidential information > intended only for the use of the addressee named above. If you are not the > intended recipient of this message you are hereby notified that any use, > dissemination, distribution or reproduction of this message is prohibited. > This email was sent by the Bank of New Zealand. You can contact us on > 0800 ASK BNZ (0800 275 269). Any views expressed in this message are those > of the individual sender and may not necessarily reflect the views of Bank > of New Zealand. > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users CAUTION - This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. This email was sent by the Bank of New Zealand. You can contact us on 0800 ASK BNZ (0800 275 269). Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of Bank of New Zealand.
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