According this article, generic JPA DAO(Data Access Object) is a pretty nice pattern.
Is there any good implementation?
According this article , generic JPA DAO(Data Access Object) is a pretty nice pattern.
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According this article, generic JPA DAO(Data Access Object) is a pretty nice pattern.
Is there any good implementation?
You could take a look into the Spring Data JPA.
A few new concepts were introduced into Spring Data JPA, for instance the Query creation based on the method name, so you can declare a method like
findById(String id)and the “generic” implementation will interpret the method’s name and execute something likeselect Entity from Entity where id = 'given string'Methods like
findByNameAndLastName(String name, String lastName)or evenfindByNameOrInternalId(String name, int internalId)are supported too.