[news.eclipse.modeling.mdt] Re: Derive constraints

[jfbriones@xxxxxxxxx (Javi)]

Hello Kenn,

Currently I'am successfully using OCL to create body expressions. I saw in 
the references you gave me how invariant constraints could be specified as 
well.

But what I would like to have is to specify the body of derived properties.

For example, in the example of Car-Person, imagine I would like to have a 
property in Car:

Car::/ownerAge (result = self.owner.age)

Thus, I would not need to insert code in Car.getOwnerAge(). In UML I do 
not have the method getOwnerAge() only the derived property ownerAge.

I just tried to create in UML the method getOwnerAge() besides the 
property ownerAge and it seems to work. Is this the way to do it? Is it 
required to add the getter in UML?

Thank you.