DaoGenerator.java

    Entity bookShelf = schema.addEntity("BookShelf");
    bookShelf.addIdProperty();

    Entity book = schema.addEntity("Book");
    book.addIdProperty();
    book.addStringProperty("name");
    Property bookFKShelves = book.addLongProperty("bookShelf_id").notNull().getProperty();

    book.addToOne(bookShelf, bookFKShelves);
    bookShelf.addToMany(book, bookFKShelves);