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what is Meta Model?

Singh Harmeet
Ranch Hand

Joined: Aug 05, 2011
Posts: 115

what is Meta Model in JPA and it is the part of JPA exam?


With Regards :-
Harmeet Singh
Bobby Jakachira
Greenhorn

Joined: Jun 01, 2010
Posts: 14
Yes it is part of the exam

Metamodel API allows you to use STRONGLY typesafe queries when using Java persistence interface.

A simple example is you won't refer to column names in your queries with the physical column names but you utilise the Metamodel class of the entity.

Each entity have a corresponding Metamodel class

tbl_persons.age (table_name.column_name)

Person_.age (Metamodel).


OCPJP, OCEJWCD, OCEJPAD, OCEEJBD
 
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