dk.rode.thesis.state
Interface FunctionalState<E>

Type Parameters:

E - The type of values delivered by applicable stateable sequences.

All Known Implementing Classes:

ReversiblePrimeSequence.PrimeState

@Participant(value="State")
public interface FunctionalState<E>

A functional state encapsulates specific state related functionality of a stateable sequence.

Transitions between functional states are based on requests using internal states via the action(Sequence.State, StateableSequence) method.

Author:

Gunni Rode / rode.dk

Method Summary

E	action(Sequence.State internalState, StateableSequence<E> sequence) Depending on the value of the internal state supplied as internalState, the following forms of actions are inferred: Sequence.State.START: initialisation requested.

Method Detail

action

E action(Sequence.State internalState,
         StateableSequence<E> sequence)

Depending on the value of the internal state supplied as internalState, the following forms of actions are inferred:

• Sequence.State.START: initialisation requested.

• Sequence.State.RESET: reset requested.

• Sequence.State.RESTART: restart requested.

• Sequence.State.NORMAL: next value requested.

• null: current value requested.

Parameters:

internalState - The internal state representing the requested action; can be null (current).

sequence - The stateable sequence in question; cannot be null.

Returns:

The sequence result from the action taken; can be null.

Throws:

NullPointerException - If sequence is null.