Question

Examine the design class diagram and add qualifiers to each association: inheritance, interface-implementation, aggregation, composition, or just a regular navigation visibility.

LiveDaracT> AddToDoActivity etends AppCompesk RecyclerView etana Viero orsmtrs fields oons tructors- impleme NieaingCN methods Databaseten Room Databace Motors ToDoViewModel ns Androidiao ToDo Bosbods ors oors tructors corstructors ToDoDao -feids FragmertAati O methods A Tasi Stac Bulde SupportParent Toggle DelegatePro ToDoRepositor fekds elds oons trutors- DateConverter ToDoAdapter extends RecyclerViex Ada MainActivity eren AppComeets fields- tfel constructors Mors in BuildConfigl imethoda tructors Examine the design class diagram and add qualifiers to each association: inheritance, interface-implementation, aggregation, composition, or just a regular navigation visibility Description Qualifier Association To DoRepository is the whole which is an aggregation of ToDo Dao and other potential data access objects (Daos). Aggregation TaDeRepositor -> TODeDaa TODeViewMedel-> LiveData T> ToDoRepositar -> Live Data T> MainActivity-> TODoRepository AppCompatAstixity.-> MainActivity ARRCOMRESTACtixity-> AddToDoActivity, TODeview Model -> TODoRepository TODeAdapter-> MainActivity RecyclerView-> DateConverter JoDo->MainActivity

Answer 1

Hi, Please find below design class diagram table with qualifiers.

Association	Qualifier	Description
ToDoRepository -> ToDoDao	Aggregation	ToDoRepository is the whole which is an aggregation of ToDoDao and other potential Daos.
ToDoViewModel -> LiveData<T>	Aggregation	ToDoViewModel has LiveData<T> as its member which is an aggregation.
ToDoRepository -> LiveData<T>	Aggregation	ToDoRepository contains LiveData<T> as its member which is an aggregation.
MainActivity -> ToDoRepository	Aggregation	MainActivity contains ToDoRepository as its member which is an aggregation.
AppCompatActivity -> MainActivity	Inheritance, Navigation Visibility	MainActivity extends AppCompatActivity which is an inheritance. Also MainActivity is dependent on AppCompatActivity which is a regular navigation visibility.
AppCompatActivity -> AddToDoActivity	Inheritance	AddToDoActivity extends AppCompatActivity which is an inheritance.
ToDoViewModel -> ToDoRepository	Aggregation,Navigation Visibility	ToDoViewModel contains ToDoRepository as its member which is an aggregation. Also ToDoViewModel is dependent on ToDoRepository which is a Navigation dependency.
ToDoAdapter -> MainActivity	Navigation Visibility	MainActivity delegates control to ToDoAdapter which is a Navigation dependency.
RecyclerVIew -> DateConverter	N/A	As per class diagram, there is no relationship between RecyclerView and DateConverter
ToDo -> MainActivity	Navigation Visibility	ToDo is dependent on MainActivity so it is an Navigation Dependency