Memento

Memento Pattern

Behavioral Type

Use cases:

this pattern is used to manages state for using current state or the previous states in program.

Classes

• Memento - contains state of an object
• Originator - create/store objects
• Caretaker - restore object from memento

Visual Diagram

Originator

Originator
-state: string
-setState() :void
-getState() : string
-saveStateToMemento(): Memento
-getStateFromMemento

Memento

Memento
-state: string
-getState() : string

Caretaker

Caretaker
-mementoList
array List
-add() : void
-get() : array