@Override
public boolean deleteBook(Book book) {
Document original = __wrapper.getDocument();
Document doc = __wrapper.getDocument();
try {
doc = __wrapper.deleteEntry(doc, "isbn", book.getIsbn());
if (doc == null) {
return false;
} else {
__wrapper.commit(doc);
return true;
}
} catch (Exception e) {
e.printStackTrace();
__wrapper.rollback(original);
return false;
}
}
@Override
public List<Book> findBooksByTitle(String title) {
Document doc = __wrapper.getDocument();
List<Book> books = new ArrayList<Book>();
try {
List<Map<String, String>> list = __wrapper.filterEntries(doc, "title", title);
for (Map<String, String> map : list) {
Book book =
new Book(
map.get("isbn"),
map.get("publisher"),
map.get("title"),
Integer.parseInt(map.get("year")),
map.get("authorIds"));
books.add(book);
}
} catch (Exception e) {
e.printStackTrace();
}
return books;
}
@Override
public List<Book> getAllBooks() {
List<Book> rval = new ArrayList<Book>();
try {
Document doc = __wrapper.getDocument();
List<Map<String, String>> allBooks = __wrapper.getAllEntries(doc);
for (Map<String, String> map : allBooks) {
Book book =
new Book(
map.get("isbn"),
map.get("publisher"),
map.get("title"),
Integer.parseInt(map.get("year")),
map.get("authorIds"));
rval.add(book);
}
} catch (Exception e) {
e.printStackTrace();
return new ArrayList<Book>();
}
return rval;
}
@Override
public Book findByPrimaryKey(String bookIsbn) {
Document doc = __wrapper.getDocument();
try {
Map<String, String> map = __wrapper.findEntry(doc, "isbn", bookIsbn + "");
if (map == null) {
return null;
} else {
Book book =
new Book(
map.get("isbn"),
map.get("publisher"),
map.get("title"),
Integer.parseInt(map.get("year")),
map.get("authorIds"));
return book;
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
@Override
public Book updateBook(Book book) {
Document original = __wrapper.getDocument();
Document doc = __wrapper.getDocument();
try {
Map<String, String> values = new HashMap<String, String>();
values.put("isbn", book.getIsbn());
values.put("publisher", book.getPublisher());
values.put("title", book.getTitle());
values.put("year", book.getYear() + "");
values.put("authorIds", Utility.getInstance().join(",", book.getAuthorIds()));
doc = __wrapper.updateEntry(doc, values, "isbn", book.getIsbn());
__wrapper.commit(doc);
} catch (Exception e) {
e.printStackTrace();
__wrapper.rollback(original);
return null;
}
return book;
}
