/// <summary>
/// Loads books from <paramref name="storage"/>.
/// </summary>
/// <exception cref="ArgumentNullException">Throws if <paramref name="storage"/>
/// is null</exception>
/// <exception cref="BookListException">Throws if some errors while
/// loading books from <paramref name="storage"/></exception>
public void LoadBooksList(IBookListStorage storage)
{
if (ReferenceEquals(storage, null))
{
throw new ArgumentNullException($"{nameof(storage)} is null");
}
logger.Debug("Loading book list from {0}", nameof(storage));
IEnumerable <Book> loadedBooks;
try
{
loadedBooks = storage.LoadBookList();
}
catch (Exception ex)
{
logger.Warn(ex, "An error has occurred during loading book's list from {0}.", nameof(storage));
throw new BookListException($"An error has occurred during loading book's list from {nameof(storage)}.", ex);
}
if (ReferenceEquals(loadedBooks, null))
{
logger.Warn("LoadBookList returned null.");
throw new BookListException($"{nameof(LoadBooksList)} returned null.");
}
list = (List <Book>)loadedBooks;
}
/// <summary>
/// Load collection to <see cref="bookList"> from storage.
/// </summary>
/// <param name="storage">Storage.</param>
/// <exception cref="ArgumentNullException">
/// Throws when <see cref="storage"> is null.
/// </exception>
public void Load(IBookListStorage storage)
{
if (storage == null)
{
throw new ArgumentNullException(nameof(storage));
}
bookList = new List <Book>(storage.LoadBookList());
}
