null_constraint.drl

jboss规则引擎

package org.drools.test

import org.drools.Person
import org.drools.Primitives

global java.util.List messages

rule "person with a null name"
  when
    Person(name == null)
  then
    messages.add("Null name found");
end

rule "Raises NPE" salience -10
  when
    Primitives(arrayAttribute == null)
  then
    messages.add("Null array found");
end