DEV475 Mastering Object-Oriented Analysis and Design with UML ...

DEV475 Mastering Object-Oriented Analysis and Design with UMLAn Object Has StateAn Object Has State• The state of an object is one of the possibleconditions in which the object may exist.• The state of an object normally changes overtime.Name: J ClarkEmployee ID: 567138Date Hired: July 25, 1991Status: TenuredDiscipline: FinanceMaximum Course Load: 3 classesName: J ClarkEmployee ID: 567138HireDate: 07/25/1991Status: TenuredDiscipline: FinanceMaxLoad: 3Professor ClarkMastering Object Oriented Analysis and Design with UMLCopyright © 2003 Rational Software, all rights reserved 10• The state of an object is one of the possible conditions that an object may existin, and it normally changes over time.• The state of an object is usually implemented by a set of properties calledattributes, along with the values of the properties and the links the object mayhave with other objects.• State is not defined by a “state” attribute or set of attributes. Instead, state isdefined by the total of an object’s attributes and links. For example, if ProfessorClark’s status changed from Tenured to Retired, the state of the Professor Clarkobject would change.2 - 10