/// <summary>
/// GetInstance method returns an object of the SensorObserver class.
/// </summary>
/// <returns>A new object of the SensorObserver class if the SensorObserver object is created for the first time, otherwise the previously created SensorObserver object is returned.</returns>
public static SensorObserver GetInstance()
{
if (singleSensorObserver == null)
{
singleSensorObserver = new SensorObserver();
SensorObserver.SensorStateChangeLog = new List <string>();
}
return(singleSensorObserver);
}
/// <summary>
/// Method NotifyObservers adds a new entry to the SensorStateChangeLog.
/// </summary>
/// <param name="sensor">The sensor in which the state has changed.</param>
public void NotifyObservers(Sensor sensor)
{
SensorObserver sensorObserver = SensorObserver.GetInstance();
sensorObserver.Update(sensor);
}
