State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams...

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State & Activity Diagrams

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Transcript of State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams...

Page 1: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

State & Activity Diagrams

Page 2: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

1. State Diagram

Page 3: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

State Diagram- Introduction

• Use Cases, Class diagrams are used to give an architectural and high-level view of a system

• The two diagrams named above are static diagrams, which means that they help in visualizing what the elements of the complete system would be, but do not say anything about the flows any object of the system can have when an event occurs.

• While coding, it is necessary to understand the details of the modes an Object of a Class can go through and its transitions at time intervals with the occurrence of any event or action.

Page 4: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

• State diagrams (also called State Chart diagrams) are used to help the developer better understand any complex/unusual functionalities or business flows of specialized areas of the system.

• In short, State diagrams depict the dynamic behavior of the entire system, or a sub-system, or even a single object in a system.

State Diagram- Introduction….

Page 5: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
Page 6: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
Page 7: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
Page 8: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
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Example 2: Order Management System-state diagram

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Example 3: Phone State

Page 11: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
Page 12: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.
Page 13: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

2. Activity Diagram

Page 14: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

Activity Diagram• Activity diagrams represent the business and

operational workflows of a system. • An Activity diagram is a dynamic diagram that shows

the activity and the event that causes the object to be in the particular state.

• So, what is the importance of an Activity diagram, as opposed to a State diagram?

• A State diagram shows the different states an object is in during the lifecycle of its existence in the system, and the transitions in the states of the objects. WHILE an Activity diagram talks more about these transitions and activities causing the changes in the object states.

Page 15: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

Elements of an Activity Diagram

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Transition

Page 17: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

Creating an Activity DiagramExample 1: Consider the example of attending a course lecture.

Page 18: State & Activity Diagrams. 1. State Diagram State Diagram- Introduction Use Cases, Class diagrams are used to give an architectural and high-level view.

Example 2: activities involved in managing course information carried out by the course administrator in Courseware Management System

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Swim Lanes

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Example 3- create a receipt activity

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Swim Lanes example- create a receipt

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More examples on Activity diagrams

• Example 4: Withdraw cash in ATM machine

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