Change the state method is missing in the ATM class object ---that other state should change once completed there part

[Sahil_Siddiqui]

change the state methos is missing in the ATM class object —that other state should change once completed there part ???

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Course: Grokking the Low Level Design Interview Using OOD Principles - Learn Interactively
Lesson: Code for the ATM System

[Saif_Ali]

@Sahil_Siddiqui

change the state methos is missing in the ATM class object —that other state should change once completed there part ???

Hello @Sahil_Siddiqui,

In the provided ATM design, the state transitions in the ATM are managed through the state classes (ATMState , IdleState , HasCardState , etc.) and their respective methods. There isn’t a specific “changeState” method in the ATM class because state changes occur based on the actions taken in the state methods themselves.

For example, in the HasCardState class, the authenticatePin method includes logic to check if the PIN is correct. If the PIN is correct, the method could change the state to SelectOperationState by assigning a new state object to currentATMState.

Happy Learning