In which class implements JpaRepository interface in spring

Question

I want to know where implement JpaRepository interface

JpaRepository extends  from PagingAndSortingRepository interface

PagingAndSortingRepository extends  from CrudRepository interface

PagingAndSortingRepository extends  from Repository interface

but where is implementation of these interface?

how all the method in those interface work( like findAll, findById, deleteAll etc)?

You don't. It works just like that. – Antoniossss Sep 21 '19 at 13:10 — Antoniossss, Sep 21 '19 at 13:10

score 0 · Answer 1 · answered Sep 21 '19 at 13:04

These interfaces are part of the Spring-Data-JPA Project.

You can find the code here: https://github.com/spring-projects/spring-data-jpa/

For e.g. JpaRepository has an implementation SimpleJpaRepository, you can find the implementation here https://github.com/spring-projects/spring-data-jpa/blob/master/src/main/java/org/springframework/data/jpa/repository/support/SimpleJpaRepository.java

Gitter link: https://gitter.im/spring-projects/spring-data

score -1 · Answer 2 · answered Sep 21 '19 at 13:11

-1

The "implementation" is build on runtime. So basicly you create interface and thats it, it is ready to @Autowire.

answered Sep 21 '19 at 13:11

Antoniossss

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In which class implements JpaRepository interface in spring

2 Answers2