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Object-Oriented Design with UML and Java // Other choices as per the use-cases // … else { action.unknownSelection(); } } while(choice.equals( 0 ) == false); } // method: run private String getSelection() { // Display menu to the user. […]

Chapter 4: Cast Study: A Library Application Book book = (Book) iter.next(); if(book.getBorrower() == null) { ConsoleIO.out.println( ntt + book); bookFound = true; } } if(bookFound == false) ConsoleIO.out.println( ntt + None ); } // method: […]

Object-Oriented Design with UML and Java else { theMessage = Book not added ; } } else { theMessage = Book already present - cannot add ; } } // method: addOneBook public String getStatus() { […]

Object-Oriented Design with UML and Java By convention the package name has only lower-case letters. It must be the first statement preceding a class declaration. For example, we have: package librarysubsystem; // … public class Action { // … } // class Action […]

Chapter 4: Cast Study: A Library Application 4.4.4 Implementation Having established the design for iteration 3, it is now time to implement it. Before doing so it is wise to decide on a general approach to the problems we will encounter. Essentially as in section 4.3.4.2, we intend solving […]

Object-Oriented Design with UML and Java The Application creates a single Action object. The Action object creates a single Library and Book objects as required. The Library creates BorrowerRecord objects as required. librarysubsystem Features %Library %BorrowedRecord %Book […]

Chapter 4: Cast Study: A Library Application Library. This should enable us to give feedback to the human user as recorded in the requirements of this iteration. 4.4.3 Design From the analysis it is clear that the domain model classes the Library, BorrowerRecord and Book must all […]

Object-Oriented Design with UML and Java Our intention is that those classes from the model, i.e. Library, BorrowerRecord and Book, should have no responsibility for input or output. Collectively we refer to them as the domain model. In the text-based versions developed so far the Application run method allows […]

Chapter 4: Cast Study: A Library Application There are no other new use-cases that follow from the new requirements as they involve the internal workings of the system. 4.4.2 Analysis The analysis of the new use-case Load blogs from file is relatively straightforward. All we […]

112 Object-Oriented Design with UML and Java 4.4 Iteration 3 Having demonstrated iteration 2 to the librarian it turns out that she wants to be able to initialize the system from a text file. We anticipate that this new requirement is not especially difficult to implement. However, she indicated […]