Requirement:
1)
Rule
When
Person.address.address1 is changed
THEN
2) Ideally we should have 2 objects, 1 for the old person instance, the
other for the new person instance so contextually the LHS equals to
oldPerson.address.address1 != newPerson.address.address1.
A
The agent that is responsible for the address change must take care to
provide information about what it does. This could be done by creating an
UpdateEvent fact referencing the Person fact and indicating the attribute
(address). Or a listener reacts to the change and insert the UpdateEvent
fact.
Thanks, when I am saying person address is changed, our app only concerns
about its initial value and its final value, any change in the middle, we
don't care.
Examples:
person.address.address1 starts with 'my addr1'
later a couple of changes were made, say its final value is 'my
It seems that this is more of a technical problem on the Java side: how to
register the fact that a certain property of an element has changed. You'll
need somthing like a clone method.
The old version of Person need and should not remain in Working Memory, but
a simple wrapper fact referencing
Yes, that is a Map base approach I am thinking.
Now more questions:
global MapObject, Object oldObjectContext
WHEN
$person: Person()
eval(((Person)oldObjectContext[$name]).jobTitle == $person.name)
THEN
Q1: without eval, the compiler will report error
Q2: without type cast, the compiler
