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javaarchitectureumlclass-diagram

UML Class Diagram Association vs Dependency

Let us say we have Class A, Class B, and Class C

Class A has an object of Class B: array = ArraList

Class A then passes this array to Class C

When drawing the class diagram which logic is the correct one:


Class A has an association with Class B and Class B, and Class C has a dependency with Class B

OR

Class A has an association with Class B, Class C has an association with Class A, and Class C has a dependency with Class B

Or are the both wrong? If so, what is the correct way of representing the following case in a class diagram?

Solution

  • Class A has an object of Class B: array = ArraList

    I suppose you mean Class A has the attribute 'array' being an 'ArrayList' of Class B, so ArrayList<B> array;

    Class A has an association with Class B and Class B, ...

    I suppose is Class A has an association with Class B, ...

    Class A then passes this array to Class C

    I suppose you mean this array is given in argument to an operation of Class C

    Class A has an association with Class B, and Class C has a dependency with Class B

    • Class A has an association with Class B : yes
    • Class C has a dependency with Class B : yes if C knows it receives (through operation argument) instances of B and 'use' them

    Class A has an association with Class B, Class C has an association with Class A, and Class C has a dependency with Class B

    • Class A has an association with Class B : yes
    • Class C has an association with Class A : there is nothing in your statement requiring that
    • Class C has a dependency with Class B : yes if C knows it receives (through operation argument) instances of B and 'use' them