public static PreferenceFactory GetInstance <T>() where T : PreferenceFactory
{
PreferenceFactory instance;
try
{
instance = DoGetInstance(typeof(T));
}
catch (Exception e)
{
Logger.GetInstance(typeof(PreferenceFactory)).Fatal("Instance initialization error: " + e);
Logger.GetInstance(typeof(PreferenceFactory)).Info("Initializing " + typeof(DefaultPreferenceFactory).FullName + "...");
instance = new DefaultPreferenceFactory();
}
return(instance);
}
private static PreferenceFactory DoGetInstance(Type type)
{
if (type == null)
{
throw new ArgumentException("Invalid arguments to get " + typeof(PreferenceFactory).Name + " instance");
}
var key = type.FullName + "_";
PreferenceFactory instance = null;
if (Instances.ContainsKey(key))
{
instance = Instances[key];
}
if (instance == null)
{
Logger.GetInstance(typeof(PreferenceFactory)).Info("Initializing " + key + "...");
var constructor = type.GetConstructor(new Type[] { });
if (constructor != null)
{
instance = (PreferenceFactory)constructor.Invoke(new object[] { });
}
}
if (instance == null)
{
Logger.GetInstance(typeof(PreferenceFactory)).Info("Initializing " + typeof(DefaultPreferenceFactory).FullName + "...");
instance = new DefaultPreferenceFactory();
}
lock (InstancesLock)
{
if (!Instances.ContainsKey(key))
{
Instances.Add(key, instance);
}
}
return(instance);
}