The solution

You must follow these steps to implement state transitions using the Persistence Infrastructure helper classes:

• Specify states;
• Specify storage mechanism for the state value;
• Identify transition methods;
• Implement getLifecycleState;
• Create a map to hold the permitted states;
• Create an object for each state;
• Create an object for each permitted transition;
• Create a private getter to retrieve the current State;
• Create a private setter to set the current State;
• Create a private helper method to perform a state transition;
• Implement state transition methods;
• Specify the initial state;
• Add state transition validation logic; and
• Override the modify method (if required).