Here's a page on the Jess wiki showing a simple way to work with enums
in Jess:
http://www.jessrules.com/jesswiki/view?EnumeratedTypes
Here's another page about a possibly more elegant way:
http://www.jessrules.com/jesswiki/view?BindEnumUserFunction
On Jul 30, 2008, at 11:26 AM, Joao Antunes Mourao wrote:
Hello,
I'm trying to make a query according to an enum type. Like for
example,
i have defined a class of car in java like:
car{
String model;
ColorEnumType color;
}
and I define the enum in java like
public enum ColorEnumType{ Black, White;}
Now, i want to make a query to see which black cars I have in the jess
memory. I do
(query search-by-color
(declare (variables ?color))
(Car (model ?model) (color ?color))
Until here I think is no problem. Now, when i want to make a search i
write:
(bind ?result (run-query* search-by-color ColorEnumType.Black))
and simple doesn' t work. If i search for the model, is no problem,
because is a String. I guess is related with the fact that color is an
enum. Also i had imported all the classes needed, so from this i guess
there is no problem.
Can anyone tell me what is the problem on this? What i'm doing wrong?
Regards,
Joao Mourao
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