/// <summary>
/// Tests the observer pattern implementation.
/// </summary>
/// <param name="args">Cmdline input arguments.</param>
static void Main(string[] args)
{
// Initialize the weather.
var latestWeather = new WeatherDataObject(-1, -1, -1);
// Initialize the observers.
var currentDisplay = new CurrentConditionsDisplay();
var statisticsDisplay = new StatisticsDisplay();
var forecastDisplay = new ForecastDisplay();
var initialObserverList = new ArrayList {
currentDisplay, statisticsDisplay, forecastDisplay
};
// Initialize the weather provider.
var defaultORamaWeatherProvider = new DefaultORamaWeatherProvider(initialObserverList, latestWeather);
// Trigger the measurements changed function.
defaultORamaWeatherProvider.MeasurementsChanged();
// Update the data.
defaultORamaWeatherProvider.SetMeasurements(new WeatherDataObject(25, 60, 0.78));
// Remove the forecast device.
defaultORamaWeatherProvider.RemoveObserver(forecastDisplay);
// Update the data.
defaultORamaWeatherProvider.SetMeasurements(new WeatherDataObject(15, 50, 0.68));
}
public void Update(object latestDataObject)
{
// Explicitly cast the generic 'object' data type to WeatherDataObject.
// This is to support the IObserver's generic 'Update' method.
_latestWeatherData = (WeatherDataObject)latestDataObject;
Display();
}
/// <summary>
/// A test hook to support the update of weather data.
/// </summary>
/// <param name="newWeatherData">The new data that will be passed to the observers.</param>
public void SetMeasurements(WeatherDataObject newWeatherData)
{
_latestWeatherDataObject = newWeatherData;
MeasurementsChanged();
}
public DefaultORamaWeatherProvider(ArrayList initialListOfRegisteredDataObjects,
WeatherDataObject initialWeatherDataObject)
{
RegisteredWeatherDataObjects = initialListOfRegisteredDataObjects;
_latestWeatherDataObject = initialWeatherDataObject;
}
public DefaultORamaWeatherProvider()
{
RegisteredWeatherDataObjects = new ArrayList();
_latestWeatherDataObject = new WeatherDataObject();
}
