Oracle JPA tutorial contains INCORRECT use of static metamodel

[lukasj]

(original issue: jakartaee/persistence#121)

See this page
https://docs.oracle.com/javaee/6/tutorial/doc/gjiup.html

It says

"The following code snippet shows how to obtain the Pet entity’s metamodel class by calling Root.getModel:
EntityManager em = ...;
Root pet = cq.from(Pet.class);
EntityType Pet_ = pet.getModel();"

Pet_ is the CANONICAL static metamodel and does NOT implement EntityType. This is utterly wrong. You get Pet_ by statically referring to it, and it is generated by an annotation processor.

The same tutorial even has
@Static Metamodel(Pet.class)
public class Pet_

{ public static volatile SingularAttribute<Pet, Long> id; public static volatile SingularAttribute<Pet, String> name; public static volatile SingularAttribute<Pet, String> color; public static volatile SetAttribute<Pet, Owner> owners; }

so it says Pet_ does not implement EntityType (and indeed is nothing to do with it).

This should be FIXED ASAP, or you will utterly confuse people