RE: [rules-users] Getting hold of the Evaluator Registry

Edson, Thanks for your replies they have really helped. 1) I am still not sure about creating a new operator, since the '>=' operator already exists it just does not cater for strings, which I want to add. So would creating a new operator cause the existing one to be overrriden when added to the registry? 2) Having looked at the examples and tests you emailed, I am still unsure how to actually wire in the changes, say for example I have replaced the existing '>=' evaluator or created a new evaluator so that '>=' now handles strings. When writing rules will the engine pick this up?.. or do I need to create a new jar by building?.. or do I need to update a configuration file?... im just not sure... 3) Wouldn't the following also add the evaluator definition by replacing the existing one.. PackageBuilderConfiguration pkgb = new PackageBuilderConfiguration(); pkgb.getEvaluatorRegistry().addEvaluatorDefinition(new ComparableEvaluatorsDefinition()); PackageBuilder builder = new PackageBuilder(pkgb); builder.addPackageFromDrl(source); Package pkg = builder.getPackage(); // Add the package to a rulebase (deploy the rule package). rules = RuleBaseFactory.newRuleBase(); rules.addPackage(pkg); Thanks for your help... ________________________________ From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli Sent: 14 July 2009 23:05 To: Rules Users List Subject: Re: [rules-users] Getting hold of the Evaluator Registry I am working in one example of drools features where I implement a custom evaluator here: http://anonsvn.jboss.org/repos/labs/labs/jbossrules/contrib/lotrc/src/mai... I use the configuration file instead of API in the example: http://anonsvn.jboss.org/repos/labs/labs/jbossrules/contrib/lotrc/src/mai... []s Edson 2009/7/14 Edson Tirelli <tirelli@post.com<mailto:tirelli@post.com>> Asif, My recommendation is create a new operator for you instead of overriding existing ones. Although if you really want to replace the existing ones, setting the property or calling the API to register a new operator will override the default. See: http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-compiler... Test method: testEvaluatorConfiguration() []s Edson 2009/7/14 Asif Iqbal <Asif.Iqbal@infor.com<mailto:Asif.Iqbal@infor.com>> Hi, What I need to do is modify one of the evaluator classes specifically '<=', so that it can handle strings. Now I know I need to create a class similar to ComparableEvaluatorDefinition. But what I want to do is replace the existing one in the evaluator registry with my implementation which will include the additional String capability. Cheers I _______________________________________________ rules-users mailing list rules-users@lists.jboss.org<mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com<http://www.jboss.com> -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com<http://www.jboss.com>