3-Use-case Analysis.ppt

Use-Case Analysis 2 Topics  Use-Case Analysis Overview  Class Diagram and key concepts  Domain modeling  Use-Case Analysis Steps  Supplement The Use-Case Description  Find Classes From Use-Case Behavior  Distribute Use-Case Behavior to Classes  Describe Responsibilities  Describe Attributes and Associations  Unify Analysis Classes  Review 3 Objectives: Use-Case Analysis  Identify the classes which perform a use-case flow of events  Distribute the use-case behavior to those classes, identifying responsibilities of the classes  Develop Use-Case Realizations that model the collaborations between instances of the identified classes 4 Use-Case Analysis Overview Supplementary Specifications Glossary Use-Case Model Use-Case Analysis Project Specific Guidelines Use-Case Realization Analysis Classes Analysis Model Software Architecture Document Use Case Analysis is performed By the Designer – once per Iteration per use case realization 5 Class Diagram?  Là mô hình chính để phân tích yêu cầu CloseRegistrationForm + open() + close registration() Student + get tuition() + add schedule() + get schedule() + delete schedule() + has pre-requisites() Schedule - semester + commit() + select alternate() + remove offering() + level() + cancel() + get cost() + delete() + submit() + save() + any conflicts?() + create with offerings() + update with new selections() Professor - name - employeeID : UniqueId - hireDate - status - discipline - maxLoad + submitFinalGrade() + acceptCourseOffering() + setMaxLoad() + takeSabbatical() + teachClass() CloseRegistrationController + is registration open?() + close registration() 6 Class Diagram Usage  When modeling the static view of a system, class diagrams are typically used in one of three ways, to model:  The vocabulary of a system  Collaborations  A logical database schema 7 Review: Class  A class is a description of a set of objects that share the same attributes, operations, relationships, and semantics.  An object is an instance of a class.  A class is an abstraction in that it  Emphasizes relevant characteristics.  Suppresses other characteristics. 8 Representing Classes and Objects in the UML Professor - name - employeeID : UniqueId - hireDate - status - discipline - maxLoad + submitFinalGrade() + acceptCourseOffering() + setMaxLoad() + takeSabbatical() + teachClass() class name attributes operations Class J Clark : Professor : Professor Named Object Anonymous Object Object 9 Review: What Is an Attribute?  An attribute is a named property of a class that describes the range of values that instances of the property may hold.  A class may have any number of attributes or no attributes at all. Attributes Student - name - address - studentID - dateOfBirth 10 Attributes in Classes and Objects Class Objects Student - name - address - studentID - dateOfBirth :Student - name = “M. Modano” - address = “123 Main St.” - studentID = 9 - dateOfBirth = “03/10/1967” :Student - name = “D. Hatcher” - address = “456 Oak Ln.” - studentID = 2 - dateOfBirth = “12/11/1969” . classes 4 Use-Case Analysis Overview Supplementary Specifications Glossary Use-Case Model Use-Case Analysis Project Specific Guidelines Use-Case Realization Analysis Classes Analysis Model Software. Use-Case Analysis 2 Topics  Use-Case Analysis Overview  Class Diagram and key concepts  Domain modeling  Use-Case Analysis Steps  Supplement The Use-Case. Classes  Describe Responsibilities  Describe Attributes and Associations  Unify Analysis Classes  Review 3 Objectives: Use-Case Analysis  Identify the classes which perform a use-case flow of events  Distribute