private IVersionProvider CreateVersionProviderFor(T newValue, T oldValue)
{
int initial_version = (m_VersionProvider.GetVersionFor(oldValue) + 1);
if (newValue == null)
{
return(new NullObjectVersionProvider(initial_version));
}
Type runtimeType = newValue.GetType();
if (HashVersionProvider.CanHandle(runtimeType))
{
return(new HashVersionProvider(newValue, initial_version));
}
else if (NotifyPropertyChangedVersionProvider.CanHandle(runtimeType))
{
return(new NotifyPropertyChangedVersionProvider(newValue, initial_version));
}
else
{
throw new InvalidOperationException(String.Format("No IVersionProvider found that can handle type '{0}'", typeof(T).FullName));
}
}