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I just learnt about the State pattern . I would like to know where in core Java / JSF/Servlets code s can I see this pattern being implemented ? I want to see how the state transition is implemented and who plays the role of states and who plays the role of context there ?
In JSF it can be lifecycle processing.
Phaseis a state with concrete states:ApplyRequestValuesPhase,InvokeApplicationPhase,ProcessValidationsPhase,RenderResponsePhase,RestoreViewPhase,UpdateModelValuesPhase. Context would beLifecycle.NOTE: This example is from Mojarra implementation of JSF.