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what is Meta Model?

 
Ranch Hand
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what is Meta Model in JPA and it is the part of JPA exam?
 
Greenhorn
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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).

 
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