Re: [rules-users] Math calculations on attributes in WHEN section of rules.

Have you looked at eval()? From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of tom ska Sent: 06 August 2010 10:49 To: rules-users(a)lists.jboss.org Subject: [rules-users] Math calculations on attributes in WHEN section of rules. Hello, what I want to do, is to calculate on object's attributes in WHEN section of rule. Can I do it? For example: class CObj { private int k; private int n; // setters and getters } Now what I want to do is: rule "r1" when p : CObj ( k + n <= 1000) then System.out.println("We love Drools :)"); end Why can't I construct conditions like in Java, or C++ (with calculations in conditions)? How can I achieve my goal? Thx, Tom. ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the postmaster(a)nds.com and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************