What methods can be used to obtain a new instance of a component configured with the prototype pattern in Spring or similar frameworks?

In Spring, to obtain a new instance of a component with the prototype scope, several approaches are used:

1. @Scope("prototype") annotation — when declaring a bean with this scope, Spring creates a new object on each request from the context.

2. ApplicationContext.getBean() — each call to this method for a prototype bean returns a new instance.

3. ObjectFactory or Provider — inject a factory into a singleton component that returns a new prototype object upon call:

@Component
@Scope("prototype")
public class MyPrototypeBean { }

@Component
public class SingletonBean {
    private final ObjectFactory<MyPrototypeBean> prototypeFactory;

    public SingletonBean(ObjectFactory<MyPrototypeBean> prototypeFactory) {
        this.prototypeFactory = prototypeFactory;
    }

    public void usePrototype() {
        MyPrototypeBean prototype = prototypeFactory.getObject();
        // use prototype
    }
}

4. Lookup method injection — annotate a method in a singleton bean with @Lookup, and Spring will override it to return a new prototype instance.

Thus, the key point is that a prototype bean is created anew on each request from the context, and to access it from singleton components, factories or lookup injections are used.