27.3.18. Memento Pattern

Try these first

1. 1.

   What is the role of the Originator in the Memento Pattern?

   Hint

   Think about which object creates the Memento.

2. 2.

   Define the Memento.

   Hint

   Consider what the Memento is used for.

3. 3.

   What does the Memento Pattern primarily allow a user to do?

   • Store data permanently
   • Create new objects
   • Restore an object's previous state

   Hint

   Recall the main purpose of the Memento Pattern.

4. 4.

   True or False: The Caretaker can modify the internal state of the Memento.

   • True
   • False

   Hint

   Think about what the Caretaker is responsible for.

5. 5.

   Implement a Memento Pattern for a character in a roleplaying game. Include features for saving, restoring, and displaying the character's state.

   Hint

   Think about the attributes of the character you will need to save.

6. 6.

   Critique the use of the Memento Pattern in a text editor application. Discuss potential improvements or alternative approaches.

   Hint

   Consider practical usage and performance in real-world scenarios.