/// <summary>
/// Load list of books from <see cref="storage"/>.
/// </summary>
/// <param name="storage"> Storage to load a list of books. </param>
/// <exception cref="ArgumentNullException">Thrown when storage is null </exception>
/// <exception cref="ArgumentException">Thrown when book list can't be loaded from storage</exception>
public void Load(IBookListStorage storage)
{
if (storage == null)
{
Logger?.Info("Unhandled ArgumentNullException:");
Logger?.Error("Argument \"storage\" in Load method can't be null.");
throw new ArgumentNullException(nameof(storage));
}
try
{
_books = storage.Load() as List <Book>;
}
catch (Exception ex)
{
Logger?.Info("Unhandled Exception:");
Logger?.Error("Some error while loading books from storage occuried.");
throw;
}
if (_books == null)
{
Logger?.Info("Unhandled ArgumentException:");
Logger?.Error($"Can't load book list from {nameof(storage)}.");
throw new ArgumentException($"Can't load book list from {nameof(storage)}.");
}
}
/// <summary>
/// Load collection of books from specified storage
/// </summary>
/// <param name="bookListStorage"></param>
/// <exception cref="ArgumentNullException"></exception>
public void LoadBooks(IBookListStorage bookListStorage)
{
if (bookListStorage == null)
{
throw new ArgumentNullException();
}
Books = bookListStorage.Load();
}
/// <summary>
/// Load list of books from the storage.
/// </summary>
/// <param name="storage"> Storage to load the list of books from. </param>
public void Load(IBookListStorage storage)
{
if (storage?.Load() == null)
{
this.logger.Error("Refused to load the books. Invalid storage.", new ArgumentNullException(nameof(storage)), storage);
throw new ArgumentNullException(nameof(storage));
}
else
{
this.books = storage.Load();
this.logger.Debug("Books were successfully loaded to the storage.");
}
}
/// <summary>
/// Loading books from binary file
/// </summary>
/// <param name="storage"></param>
/// <exception cref="ArgumentNullException">Argument must not be null</exception>
/// <returns>Before safed BookListServide</returns>
public void LoadFromStorage(IBookListStorage storage)
{
if (storage == null)
{
throw new ArgumentNullException(nameof(storage));
}
foreach (Book book in storage.Load())
{
AddBook(book);
}
logger.Debug($"List of books loaded from storage");
}
/// <summary>
/// Loads collection of books from storage
/// </summary>
public void LoadFromStorage()
{
bookList.Clear();
bookList = storage.Load();
logger.Info($"Collection of books have loaded to file");
}
/// <summary>
/// Load list of books from <see cref="storage"/>.
/// </summary>
/// <returns> Storage to load a list of books. </returns>
public void Load(IBookListStorage storage)
{
this.books = storage?.Load() ?? throw new ArgumentNullException(nameof(storage));
}
public BookListService(IBookListStorage bookListStorage)
{
books = new List <Book>(bookListStorage.Load());
}
