Question

1. Answer the following questions regarding the class diagram (and underlying model) given below. Role character:string (Video is abstract) Actor Video stageName: string title: string play() Hireable Commercial company: string sell) Producer genre: string obsess0 Movie genre string remake) Composition:_ 1.20 Movie Idea storyboard: string pitch) 1. What attributes does a Commercial have? 2. How many Videos can an Actor have a Role in? Why? 3. Can two Producers ever have the same Movie Idea (the object)? What about the UMML composition relationship supports your answer?

Answer 1

1. A Commercial have attribute name company of type string as shown in diagram.

2. An actor have a Role in as many Videos as recorded in the list of videos because the class Role is association class which is used for tying association between primary classes Actor and Video and hence there can be many actors in multiple videos with different roles.

3. Since the associate from Movie idea to Producer class is shown using composition operator which means the existence of Movie idea is dependent upon some object in Producer class. Hence each object in Movie class will be associated uniquely with only one object of Producer class, although one object of Producer class can have multiple objects of Movie idea.

So to answer the question, although two producers can have same movie idea in the form of representing them as string, but one object of class Movie idea cannot be associated with more than one object of class Producer.

So as per UML composition relationship, two producer cannot have same object of Movie idea.

Please comment for any clarification.