private void deleteAuthor(Author author) {
try {
Connection conn = getConnection();
try {
AuthorDAO authorDAO = new AuthorDAO(conn);
BookDAO bookDAO = new BookDAO(conn);
List<Book> authorBooks =
(List<Book>)
bookDAO.read(
"SELECT * FROM tbl_book WHERE tbl_book.bookId IN (SELECT tbl_book_authors.bookId FROM tbl_book_authors WHERE authorId = ?)",
new Object[] {author.getAuthorId()});
if (authorBooks.size() > 0) {
ArrayList<String> answers = new ArrayList<String>();
answers.add("No, nevermind");
answers.add("Yes, delete this author");
System.out.println(
author + " has (co)authored " + authorBooks.size() + " books in our records");
System.out.println(
"Are you sure you still want to delete? Some books may remain with no author");
displayOptions(answers);
int in = getInputInt(1, 2);
if (in == 1) {
return;
}
}
System.out.println("here");
authorDAO.delete(author);
conn.commit();
conn.close();
} catch (Exception e) {
conn.rollback();
conn.close();
}
} catch (Exception e) {
// TODO Auto-generated catch block
System.err.println("Error while connecting to database");
e.printStackTrace();
}
}
/** *************************************************************************************** */
public void DeleteAuthor(Author author) throws Exception {
ConnectionUtil c = new ConnectionUtil();
Connection conn = c.createConnection();
try {
if (author == null
|| author.getAuthorName() == null
|| author.getAuthorName().length() == 0
|| author.getAuthorName().length() > 45) {
throw new Exception("The Author cannot be null");
} else {
AuthorDAO adao = new AuthorDAO(conn);
adao.delete(author);
conn.commit();
}
} catch (Exception e) {
e.printStackTrace();
conn.rollback();
} finally {
conn.close();
}
}
