Kuidas Hibernate'is on edasi lükatud kogumite initsialiseerimine rakendatud?

In Hibernate, lazy loading of collections is implemented through proxy objects and special collection wrappers. When an entity with a collection is loaded, Hibernate does not immediately load all elements of the collection but instead creates a proxy collection that contains a reference to the session and query information.

When the collection is used for the first time (for example, by calling the size() method or iterating over it), Hibernate automatically executes a database query to load the actual data. This helps save resources and reduce load time, especially when working with large volumes of data.

Example:

@Entity
public class Author {
    @OneToMany(fetch = FetchType.LAZY, mappedBy = "author")
    private Set<Book> books;

    // getters and setters
}

Here, the books collection will be loaded only upon first access, not when the Author object is loaded.