ElevatorEvent.java

// PART OF THE MACHINE SIMULATION. DO NOT CHANGE.

package nachos.machine;

/**
 * An event that affects elevator software.
 */
public final class ElevatorEvent {
    public ElevatorEvent(int event, int floor, int elevator) {
        this.event = event;
        this.floor = floor;
        this.elevator = elevator;
    }

    /** The event identifier. Refer to the <i>event*</i> constants. */
    public final int event;
    /** The floor pertaining to the event, or -1 if not applicable. */
    public final int floor;
    /** The elevator pertaining to the event, or -1 if not applicable. */
    public final int elevator;

    /** An up button was pressed. */
    public static final int eventUpButtonPressed = 0;
    /** A down button was pressed. */
    public static final int eventDownButtonPressed = 1;
    /** A floor button was pressed inside an elevator. */
    public static final int eventFloorButtonPressed = 2;
    /** An elevator has arrived and stopped at its destination floor. */
    public static final int eventElevatorArrived = 3;
    /** All riders have finished; the elevator controller should terminate. */
    public static final int eventRidersDone = 4;
}