Re: [rules-users] Re: About for and inheritance

Thanks. I was supposing so... Do you think test 3 should throw a ClassCastException or just not match? Chris 2007/9/27, Edson Tirelli < tirelli(a)post.com >: > > > Yes, drools is deferring the type verification until it is needed (in > your example, to check the constraint). May I ask you please to open a > JIRA... I will fix that. > > []s > Edson > > 2007/9/27, Chris Woodrow <woodrow.chris(a)gmail.com&gt;: > > > I am sorry I didn't mean 'for' but 'from'. > > :D > > > > 2007/9/27, Chris Woodrow < woodrow.chris(a)gmail.com&gt;: > > > > > > Hi, > > > I recently find out a few issues using for, and I wanted to share it > > > with you. I made a simple exemple to illustrate my purpose. > > > > > > My classes are (I did not represent accessors & constructors): > > > > > > public class Cheese { > > > protected String name; > > > } > > > > > > public class FrenchCheese extends Cheese{ > > > private String smell; > > > } > > > > > > public class Person { > > > private Cheese likes; > > > } > > > > > > Here is my rule set : > > > > > > package rules > > > > > > rule "likes cheese" > > > when > > > $person : Person () > > > Cheese( ) from $person.getLikes() > > > then > > > System.out.println ("likes cheese"); > > > end > > > > > > > > > rule "likes french cheese" > > > when > > > $person : Person () > > > FrenchCheese( ) from $person.getLikes() > > > then > > > System.out.println ("likes french cheese"); > > > end > > > > > > First test : > > > Cheese cheese = new FrenchCheese("good", "camembert"); > > > Person person = new Person(); > > > person.setLikes(cheese); > > > > > > Output : > > > likes french cheese > > > likes cheese > > > > > > Wich is expected... > > > > > > Second test : > > > Cheese cheese = new Cheese(); > > > Person person = new Person(); > > > person.setLikes(cheese); > > > > > > Output : > > > likes french cheese > > > likes cheese > > > > > > That's the first strange thing. As far as I am concerned, rule > > > "likes french cheese" should not match (since a Cheese is not a > > > FrenchCheese). > > > > > > I made a change to the second rule : > > > rule "likes french cheese" > > > when > > > $person : Person () > > > FrenchCheese( smell == "good" ) from $person.getLikes() > > > then > > > System.out.println("likes french cheese"); > > > end > > > > > > Third test : > > > Cheese cheese = new Cheese(); > > > Person person = new Person(); > > > person.setLikes(cheese); > > > > > > output : > > > It throwed an exception : Exception in thread "main" > > > java.lang.ClassCastException: rules.Cheese > > > I am not saying the ClassCastException is not to expect in such a > > > case but I think I would simply expect it not to match (as far as a Cheese > > > is not a FrenchCheese). > > > > > > Chris > > > > > > > > > _______________________________________________ > > rules-users mailing list > > rules-users(a)lists.jboss.org > > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > > -- > Edson Tirelli > Software Engineer - JBoss Rules Core Developer > Office: +55 11 3529-6000 > Mobile: +55 11 9287-5646 > JBoss, a division of Red Hat @ www.jboss.com > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users