Compiled by:Dr. Avi Rosenfeld Based on: asharm4/432/432.ppt 97.98/OOA+D/4-4-Class-Advanced.ps

Compiled by:Dr. Avi RosenfeldBased on:

http://my.ilstu.edu/~asharm4/432/432.ppthttp://www.sts.tu-harburg.de/teaching/ws-97.98/

OOA+D/4-4-Class-Advanced.ps " דיין ר מד חומר

http://www3.interscience.wiley.com:8100/legacy/college/dennis/0471073229/ppt/ch15.ppt

UMLan overview

UML Topics

1. The general picture

2. Use Cases

3. Class Diagrams

4. Sequence Diagram

5. State Chart Diagram

General Picture: 4+1 view Use Case view

• Understandability Logical View

• Functionality Process View

• Performance• Scalable• Throughput

Implementation View• Software management

Deployment View • System topology• Delivery• Installation

UML Diagrams

UML includes diagrams for use cases static structures (class and object diagrams) behavior (state-chart, activity, sequence and collaboration

diagrams) implementation (component and deployment diagrams).

For data modeling purposes UML uses class diagrams, to which constraints in a textual language may be added

Diagrams in UML

A Diagram is the graphical presentation of a set of elements, most often rendered as a connected graph of things and relationships. UML includes 9 such diagrams.

1. Class Diagram. V

2. Object Diagram. V

3. Use Case Diagram. V

4. Sequence Diagram. V

5. Collaboration Diagram.

6. State Chart Diagram. V

7. Activity Diagram.

9. Deployment Diagram.

Class Diagrams

Class Diagrams describe the static structure of a system, or how it is structured rather than how it behaves. These diagrams contain the following elements.

• Classes, which represent entities with common characteristics or features. These features include attributes, operations and associations.

• Associations, which represent relationships that relate two or more other classes where the relationships have common characteristics or features. These attributes and operations.

Class Diagram

Skill

Name: String

Desc: String

Create(): Skill

setName(): (Name:String)

getName(): String

setDesc(): (Desc:String)

getDesc(): String

destroy()

PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design, 2nd EditionCopyright 2003 © John Wiley & Sons, Inc. All rights reserved.

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An Object and Object Instances


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Classes and Objects


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Class Hierarchy

Object Diagrams

Object Diagrams describe the static structure of a system at a particular time. Whereas a class model describes all possible situations, an object model describes a particular situation. Object diagrams contain the following elements:

• Objects, which represent particular entities. These are instances of classes.

• Links, which represent particular relationships between objects. These are instances of associations.

.

של דוגמאכספומט


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Class Diagram for Manage Appointment

טרמינולוגיה של יחס Associationיחס בשם

ממודל בעזרת קו המקשר שתי מחלקות. Associationהיחס .Executes, יש גם כיוון: ראה את השם association. כאשר נותנים שם ל-associationאפשר לתת שם ל-

. role nameאפשר גם לציין תפקיד דוגמא

אובייקטים בין תלות

יחס יש סוגים Multiplicityמושג

ערכים שמופיעים בקצוות הקו המקשר שתי מחלקות. .associationכל ערך אומר כמה אובייקטים מכל מחלקה משתתפים ב-


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Multiplicity

Composition

Aggregationיחס בשם )יהלום חלול(.hollow diamond יחס זה הוא יחס חלש. הוא ממודל בעזרת

רשימת היחסים One-to-One relationshipהיחס

One-to-Many relationshipהיחס Many-to-One relationshipהיחס

Aggregation


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Aggregation and Generalization Associations

Composition

Use Case Diagrams

Use Case Diagrams describe the functionality of a system and users of the system. These diagrams contain the following elements:

• Actors, which represent users of a system, including human users and other systems.

• Use Cases, which represent functionality or services provided by a system to users.

Use case diagrams

High Level Use Case Diagram

Manage Resources

Manage Projects

System Admin

Resource Manager

Project Manager

System Administrator

Managing Resources Use Case DiagramAdd Skill

Remove Skill

Update Skill

Find Skill

Add Resourc

eRemove Resourc

eUpdate Resourc

e

Find Resourc

e

Unassign Skill from

Resource

Assign Skill from

Resource

Resource Manager

Actors


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Use Case


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Use-Case Diagram for Specialized Actor


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Extends or Uses Associations


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Steps in Creating the Use Case Diagram

1. Identify use cases2. Draw the system boundary3. Place use cases on the diagram Group use cases into packages

Add special use case associations

4. Identify the actors5. Add associations

Sequence Diagrams

Sequence Diagrams describe interactions among classes. These interactions are modeled as exchange of messages. These diagrams focus on classes and the messages they exchange to accomplish some desired behavior. Sequence diagrams are a type of interaction diagrams. Sequence diagrams contain the following elements:

• Class roles, which represent roles that objects may play within the interaction.

• Lifelines, which represent the existence of an object over a period of time.

• Activations, which represent the time during which an object is performing an operation.

• Messages, which represent communication between objects.

Sequence Diagram


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Sequence Diagram


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Steps in Creating a Sequence Diagram

1. Identify classes2. Add actions3. Place lifeline and focus of control


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Syntax for Sequence Diagram

Statechart Diagrams

Statechart (or state) diagrams describe the states and responses of a class. Statechart diagrams describe the behavior of a class in response to external stimuli. These diagrams contain the following elements:

• States, which represent the situations during the life of an object in which it satisfies some condition, performs some activity, or waits for some occurrence.

• Transitions, which represent relationships between the different states of an object.


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Sequence Diagram

State Chart Diagram


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Statechart Concepts A dynamic model showing changes

of state of a single class over time in response to events along with its responses and actions

Typically not used for all classes, but just to help simplify the design of algorithms for methods of complex classes


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Statechart Diagram for a Hospital Patient


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Syntax for Statechart Diagram


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The Life of an Order


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Steps for Creating a Statechart Diagram

1. Identify the states2. Identify the transitions


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Statechart Diagram for an Order

Documents

Compiled by:Dr. Avi Rosenfeld Based on: asharm4/432/432.ppt 97.98/OOA+D/4-4-Class-Advanced.ps