Creating Operations
Messages in interaction diagrams typically are mapped to operations of the receiving class. However, there are some special cases where the message does not become an operation. If the receiving class is a boundary class that is a placeholder for a graphical user interface (GUI) type class, the message is a statement of the requirements for the GUI. These types of messages typically are implemented as some type of GUI control (i.e., a button) and are not mapped to operations since the behavior is carried out by the GUI control itself. For example, the Professor actor must enter a password to start the Add a Course Offering scenario. This is represented as a message to the boundary class ProfessorCourseOptions. This will never ...
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