October 2002
Intermediate to advanced
288 pages
5h 4m
English
Content preview from Visual Modeling with Rational Rose 2002 and UMLBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
State, Behavior, and Identity
The state of an object is one of the possible conditions in which it may exist. The state of an object typically changes over time, and is defined by a set of properties (called attributes), with the values of the properties, plus the relationships the object may have with other objects. For example, a course offering object in the registration system may be in one of two states: open and closed. If the number of students registered for a course offering is less than 10, the state of the course offering is open. When the tenth student registers for the course offering, the state becomes closed.
Behavior determines how an object responds to requests from other objects and typifies everything the object can do. Behavior ...