/**
* Updates book information.
*
* @param oldBook book, which parameters should be updated.
* @param newBook book, which parameters will be set to old book.
* @throws LibraryProviderException in case of LibraryProviderException
* @throws RemoteException in case of RemoteException
*/
public synchronized void updateBook(Book oldBook, Book newBook)
throws LibraryProviderException, RemoteException {
Book copyOld = oldBook.copyBook();
int newBookCount = newBook.getCount();
int reservedBookCount = recordProvider.getReservedBookCount(oldBook.getId());
if (newBookCount < reservedBookCount) {
throw new LibraryProviderException(
"Can't decrease count of copies of book with ISBN "
+ oldBook.getIsbn()
+ " to "
+ newBookCount
+ ", minimum value is "
+ reservedBookCount);
}
if (newBook.getCount() <= 5) {
try {
bookDAO.updateBook(oldBook.getId(), newBook);
newBook.setId(oldBook.getId());
} catch (LibraryDAOException e) {
throw new LibraryProviderException(e.getMessage(), e);
}
updateISBNCash(copyOld, newBook);
updateSearchCash(copyOld, newBook);
} else {
throw new LibraryProviderException(
"Count of books with ISBN "
+ newBook.getIsbn()
+ " can't be updated up "
+ "to "
+ newBook.getCount()
+ ", maximum count of "
+ "book copies should be less than 5, you can add no more than 5 books.");
}
}
public Book getBook(int id) {
for (Book book : books) {
if (book.getId() == id) {
return book;
}
}
return null;
}
/**
* Creates new book in book storage. If book with the isbn as in new book is already exists,
* updates count of books with appropriate isbn. Doesn't allow to create more than 5 copies of
* books with the same isbn.
*
* @param book for creation
* @throws LibraryProviderException in case of LibraryProviderException
* @throws RemoteException in case of RemoteException
*/
public synchronized void createBook(Book book) throws LibraryProviderException, RemoteException {
checkISBNCount(book);
Book sameBook = isbnCash.get(book.getIsbn());
if (sameBook == null) {
try {
bookDAO.createBook(book);
} catch (LibraryDAOException e) {
throw new LibraryProviderException(e.getMessage(), e);
}
addBookToSearchCash(book);
addToISBNCash(book);
} else {
book.setCount(sameBook.getCount() + book.getCount());
book.setId(sameBook.getId());
try {
bookDAO.updateBook(sameBook.getId(), book);
} catch (LibraryDAOException e) {
throw new LibraryProviderException(e.getMessage(), e);
}
updateISBNCash(sameBook, book);
updateSearchCash(sameBook, book);
}
}
public synchronized void deleteBooks(Book book, int deleteCount)
throws LibraryProviderException, RemoteException {
int bookCount = getBookCount(book);
checkDeletionChance(book, deleteCount);
if (bookCount <= deleteCount) {
try {
bookDAO.delete(book.getId());
} catch (LibraryDAOException e) {
throw new LibraryProviderException(e.getMessage(), e);
}
removeFromISBNCash(book);
removeBookFromSearchCash(book);
} else {
Book copy = book.copyBook();
book.setCount(bookCount - deleteCount);
try {
bookDAO.updateBook(book.getId(), book);
} catch (LibraryDAOException e) {
throw new LibraryProviderException(e.getMessage(), e);
}
updateISBNCash(copy, book);
updateSearchCash(copy, book);
}
}
private void checkDeletionChance(Book book, int deleteCount)
throws LibraryProviderException, RemoteException {
int bookCount = getBookCount(book);
int reservedCount = recordProvider.getReservedBookCount(book.getId());
int availableCount = bookCount - reservedCount;
if (availableCount < deleteCount) {
throw new LibraryProviderException(
"Can't delete"
+ deleteCount
+ " book(s) with ISBN '"
+ book.getIsbn()
+ "'. There are "
+ reservedCount
+ " book(s) reserved and "
+ availableCount
+ " book(s) available.");
}
}