/**
* This is the constructor for the BuildingHandler.
* It creates the internal building list and registers a callback to it.
* All the buillding are also being loaded and placed into objects of the type building.
*/
private BuildingHandler()
{
_handler = DatabaseHandler.GetInstance();
this._buildings = new ObservableCollection<Building>();
this._buildings.CollectionChanged += EventBuildingCollectionChanged;
LoadBuildings();
}
/**
* This is the constructor for the LocationHandler.
* It creates the internal floor list and registers a callback to it.
*/
private LocationHandler()
{
this._handler = DatabaseHandler.GetInstance();
this._locations = new ObservableCollection<Location>();
this._locations.CollectionChanged += EventLocationCollectionChanged;
LoadLocations();
}
/**
* <returns> This method will return the singleton's instance. </returns>
*/
public static DatabaseHandler GetInstance()
{
if(_handler == null) {
_handler = new DatabaseHandler();
}
return _handler;
}