public static List<Book> listBooksByTitleInfix(String titleInfix, int offset, int limit) {
titleInfix = titleInfix.toLowerCase();
int curOffset = 0;
ArrayList<Book> result = new ArrayList<Book>(limit);
for (int i = 0; i < STORE.size(); i++) {
Book book = STORE.get(i);
if (book.getTitle().toLowerCase().contains(titleInfix)) {
if (curOffset >= offset) {
result.add(book);
}
curOffset++;
}
if (result.size() == limit) {
break;
}
}
return result;
}
public static Book findBook(Long id) {
for (Book b : STORE) {
if (b.getId().equals(id)) {
return b;
}
}
return null;
}
public static Integer countBooksByTitleInfix(String infix) {
int count = 0;
infix = infix.toLowerCase();
for (Book b : STORE) {
if (b.getTitle().toLowerCase().contains(infix)) {
count++;
}
}
return count;
}
public static Long save(Book book) {
long id = book.getId() == null ? ++LAST_ADDED_ID : book.getId();
book.setId(id);
book.increaseVersion();
int indexOf = STORE.indexOf(book);
if (indexOf == -1) {
STORE.add(book);
} else {
STORE.set(indexOf, book);
}
return id;
}