Casting an Object value in the LHS
by rrogers＠us.imshealth.com
Suppose I have a "Measurement" class, with a getName() method that
returns a String and with a getValue() method that returns an Object.
Sometimes the Object is a String, sometimes a Integer, sometimes a
Double. I know that a "Foo" Measurement must be an integer, so I could
cast (or otherwise coerce) into a form that can be compared with a
constant integer (or other "Foo" Measurement).
How do I handle this type of value in the LHS of the rule?
when
$m : Measurement(name == "Foo", value < 10)
then
System.out.println("It's less than ten!");
end
I'd also like to be able to test for the Objects type (instanceof). I'm
using java as my dialect, if that makes a difference. For other
reasons I'd like to avoid having to either subclass Measurement or add
type-specific value accessors.
-Russ
