StateIsActiveStatemachine.java

package org.yakindu.scr.stateisactive;

public class StateIsActiveStatemachine implements IStateIsActiveStatemachine {

	protected class SCInterfaceImpl implements SCInterface {
	
		private boolean event1;
		
		public void raiseEvent1() {
			event1 = true;
		}
		
		protected void clearEvents() {
			event1 = false;
		}
	}
	
	protected SCInterfaceImpl sCInterface;
	
	private boolean initialized = false;
	
	public enum State {
		r1_R1A,
		r1_R1B,
		r2_R2A,
		r2_R2B,
		$NullState$
	};
	
	private final State[] stateVector = new State[2];
	
	private int nextStateIndex;
	
	public StateIsActiveStatemachine() {
		sCInterface = new SCInterfaceImpl();
	}
	
	public void init() {
		this.initialized = true;
		for (int i = 0; i < 2; i++) {
			stateVector[i] = State.$NullState$;
		}
		clearEvents();
		clearOutEvents();
	}
	
	public void enter() {
		if (!initialized) {
			throw new IllegalStateException(
					"The state machine needs to be initialized first by calling the init() function.");
		}
		enterSequence_R1_default();
		enterSequence_R2_default();
	}
	
	public void exit() {
		exitSequence_R1();
		exitSequence_R2();
	}
	
	/**
	 * @see IStatemachine#isActive()
	 */
	public boolean isActive() {
		return stateVector[0] != State.$NullState$||stateVector[1] != State.$NullState$;
	}
	
	/** 
	* Always returns 'false' since this state machine can never become final.
	*
	* @see IStatemachine#isFinal()
	*/
	public boolean isFinal() {
		return false;
	}
	/**
	* This method resets the incoming events (time events included).
	*/
	protected void clearEvents() {
		sCInterface.clearEvents();
	}
	
	/**
	* This method resets the outgoing events.
	*/
	protected void clearOutEvents() {
	}
	
	/**
	* Returns true if the given state is currently active otherwise false.
	*/
	public boolean isStateActive(State state) {
	
		switch (state) {
		case r1_R1A:
			return stateVector[0] == State.r1_R1A;
		case r1_R1B:
			return stateVector[0] == State.r1_R1B;
		case r2_R2A:
			return stateVector[1] == State.r2_R2A;
		case r2_R2B:
			return stateVector[1] == State.r2_R2B;
		default:
			return false;
		}
	}
	
	public SCInterface getSCInterface() {
		return sCInterface;
	}
	
	public void raiseEvent1() {
		sCInterface.raiseEvent1();
	}
	
	private boolean check_R1_R1A_tr0_tr0() {
		return isStateActive(State.r2_R2B);
	}
	
	private boolean check_R2_R2A_tr0_tr0() {
		return sCInterface.event1;
	}
	
	private void effect_R1_R1A_tr0() {
		exitSequence_R1_R1A();
		enterSequence_R1_R1B_default();
	}
	
	private void effect_R2_R2A_tr0() {
		exitSequence_R2_R2A();
		enterSequence_R2_R2B_default();
	}
	
	/* 'default' enter sequence for state R1A */
	private void enterSequence_R1_R1A_default() {
		nextStateIndex = 0;
		stateVector[0] = State.r1_R1A;
	}
	
	/* 'default' enter sequence for state R1B */
	private void enterSequence_R1_R1B_default() {
		nextStateIndex = 0;
		stateVector[0] = State.r1_R1B;
	}
	
	/* 'default' enter sequence for state R2A */
	private void enterSequence_R2_R2A_default() {
		nextStateIndex = 1;
		stateVector[1] = State.r2_R2A;
	}
	
	/* 'default' enter sequence for state R2B */
	private void enterSequence_R2_R2B_default() {
		nextStateIndex = 1;
		stateVector[1] = State.r2_R2B;
	}
	
	/* 'default' enter sequence for region R1 */
	private void enterSequence_R1_default() {
		react_R1__entry_Default();
	}
	
	/* 'default' enter sequence for region R2 */
	private void enterSequence_R2_default() {
		react_R2__entry_Default();
	}
	
	/* Default exit sequence for state R1A */
	private void exitSequence_R1_R1A() {
		nextStateIndex = 0;
		stateVector[0] = State.$NullState$;
	}
	
	/* Default exit sequence for state R1B */
	private void exitSequence_R1_R1B() {
		nextStateIndex = 0;
		stateVector[0] = State.$NullState$;
	}
	
	/* Default exit sequence for state R2A */
	private void exitSequence_R2_R2A() {
		nextStateIndex = 1;
		stateVector[1] = State.$NullState$;
	}
	
	/* Default exit sequence for state R2B */
	private void exitSequence_R2_R2B() {
		nextStateIndex = 1;
		stateVector[1] = State.$NullState$;
	}
	
	/* Default exit sequence for region R1 */
	private void exitSequence_R1() {
		switch (stateVector[0]) {
		case r1_R1A:
			exitSequence_R1_R1A();
			break;
		case r1_R1B:
			exitSequence_R1_R1B();
			break;
		default:
			break;
		}
	}
	
	/* Default exit sequence for region R2 */
	private void exitSequence_R2() {
		switch (stateVector[1]) {
		case r2_R2A:
			exitSequence_R2_R2A();
			break;
		case r2_R2B:
			exitSequence_R2_R2B();
			break;
		default:
			break;
		}
	}
	
	/* The reactions of state R1A. */
	private void react_R1_R1A() {
		if (check_R1_R1A_tr0_tr0()) {
			effect_R1_R1A_tr0();
		}
	}
	
	/* The reactions of state R1B. */
	private void react_R1_R1B() {
	}
	
	/* The reactions of state R2A. */
	private void react_R2_R2A() {
		if (check_R2_R2A_tr0_tr0()) {
			effect_R2_R2A_tr0();
		}
	}
	
	/* The reactions of state R2B. */
	private void react_R2_R2B() {
	}
	
	/* Default react sequence for initial entry  */
	private void react_R1__entry_Default() {
		enterSequence_R1_R1A_default();
	}
	
	/* Default react sequence for initial entry  */
	private void react_R2__entry_Default() {
		enterSequence_R2_R2A_default();
	}
	
	public void runCycle() {
		if (!initialized)
			throw new IllegalStateException(
					"The state machine needs to be initialized first by calling the init() function.");
		clearOutEvents();
		for (nextStateIndex = 0; nextStateIndex < stateVector.length; nextStateIndex++) {
			switch (stateVector[nextStateIndex]) {
			case r1_R1A:
				react_R1_R1A();
				break;
			case r1_R1B:
				react_R1_R1B();
				break;
			case r2_R2A:
				react_R2_R2A();
				break;
			case r2_R2B:
				react_R2_R2B();
				break;
			default:
				// $NullState$
			}
		}
		clearEvents();
	}
}