UML class diagram - can aggregated object be part of two aggregated classes?

Posted by user970696 on Programmers See other posts from Programmers or by user970696
Published on 2013-11-01T11:55:16Z Indexed on 2013/11/01 16:20 UTC
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Some sources say that aggregation means that the class owns the object and shares reference. Lets assume an example where a company class holds a list of cars but departments of that company has list of cars used by them.

class Department
{
   list<Car> listOfCars;
}

class Company
{
   list<Car> listOfCars;
   //initialization of the list
}

So in UML class diagram, I would do it like this. But I assume this is not allowed because it would imply that both company and department own the objects..

[COMPANY]<>------[CAR]
[DEPARTMENT]<>---|        //imagine this goes up to the car class

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