[rules-users] DROOLS 4.0.7 Regular expression

Hi there, I'm looking how to use regular expression with Drools 4. I've already found some things but they don't work. Here is an example I want to do, considering all getters and setters are properly written: Class House + private Window myWindow + private Phone myPhone Class Door + private String name Class Phone + private String phoneNumber Let's say in my country phone numbers are the following type: xx/xxx.xx.xx If I give my house to the session, how can I check if the phone is correct? I've tryied this but that's not working: rule "Check phone" when h : House ( phone: phone ); eval ( phone != null ); Phone ( phoneNumber matches "^ -regex- $"); then System.out.println("my phone is correct"); End Thanks for help, Romain Van der Keilen