Re: [rules-users] Rule Reuse Best Practice

2 ways: 1. If you have a common superclass/interface for your objects and the superclass/interface has the method to return your dln, just make use of inheritance: when MyDTOInterface( dln not matches "^.{5,15}$") then // do something 2. If you want to use composition instead, make dln a top level fact: when DLN( id not matches "^.{5,15}$") then // do something Edson 2009/12/15 Jason Davidson <jljdavidson(a)gmail.com&gt; > Hello, > > What is the best practice for reusing rules? I've got a license number > validation rule that I need to reuse for different fact types. For example, > the first rule uses the license number in a CitationDTO fact: > rule "Citation DL Number" > ruleflow-group "CitationEntryValidationFlow" > when > CitationDTO($dln : > citationSubject.driverLicense.driverAuthorizationId not matches "^.{5,15}$") > then > resultHolder.setMessage(GenericCitationFieldIds.DLN,"DLN [{0}] > must be at least 5 characters long and no more than 15 characters long.", > new Object[]{$dln}); > end > > Then I have another rule that uses the license number from the > InCourtSearchDTO: > rule "InCourt DL Number" > ruleflow-group "InCourtSearchValidationGroup" > when > InCourtSearchDTO( $d : dln not matches "^.{5,15}$") > then > resultHolder.setMessage(UserLogonFieldIds.END_DT,"DLN [{0}] must > be at least 5 characters long and no more than 15 characters long.", new > Object[]{$d}); > end > > Obviously this is a poor implementation because the license number check > 'not matches "^.{5,15}$"' is duplicated. Is there a way I can reuse this > rule? > > Thanks! > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users