Use Case 8--Play Saved Game

Context of Use:
The User had previously decided to exit and save game, and now decides to return to the saved game.
　

Scope:
J2ME Pac-man Game Application.
　

Level:
User Goal
　

Primary Actor:
Mobile Phone or PDA User
　

Stakeholder and Interests:
User: wants to be able to play game in more than one sitting.
　

Precondition:
The User has started the application and is at the Main Menu. If the User has not previously saved a game, the "Play Saved Game" option will not appear on the Main Menu.
　

Minimal Guarantees:
Does not crash the application.
　

Success Guarantees:
The User is transferred to the Play Game Use Case in the previously saved state.
　

Trigger:
User selects "Play Saved Game" from the Main Menu.
　

Main Success Scenario:
　

• 1. User selects "Play Saved Game" from the Main Menu.
  　
• 2. Application verifies that the Saved Game is valid.
  　
• 3. Application loads Saved Game.
  　
• 4. User is taken to Play Game Use Case.
  　

Extensions:
　

• la. Saved Game is not found.
  　
  • lal. System displays a message that the game does not exist.
    　
  • 1a2. User is taken back to the Main Menu, and "Play Saved Game" is no longer an option.
    　
• 2a. Saved Game is corrupted.
  　
  • 2al. System displays a message that the game is corrupted.
    　
  • 2a2. System deletes corrupted file.
    　
  • 2a3. User is taken back to the Main Menu, and "Play Saved Game" is no longer an option.
    　

Technology and Data Variation:
None
　

Related Information:
PacMan Use Case 8 Sequence Diagram
PacMan Use Case 8 and 9 Class Diagram
PacMan Package Diagram
Pac Man Use Case Model