org.springframework.data.repository

Interface CrudRepository<T,ID extends Serializable>

All Superinterfaces:

Repository<T,ID>

All Known Subinterfaces:

PagingAndSortingRepository<T,ID>

@NoRepositoryBean
public interface CrudRepository<T,ID extends Serializable>
extends Repository<T,ID>

Interface for generic CRUD operations on a repository for a specific type.

Author:

Oliver Gierke, Eberhard Wolff

Method Summary

Modifier and Type	Method and Description
long	count() Returns the number of entities available.
void	delete(ID id) Deletes the entity with the given id.
void	delete(Iterable<? extends T> entities) Deletes the given entities.
void	delete(T entity) Deletes a given entity.
void	deleteAll() Deletes all entities managed by the repository.
boolean	exists(ID id) Returns whether an entity with the given id exists.
Iterable<T>	findAll() Returns all instances of the type.
Iterable<T>	findAll(Iterable<ID> ids) Returns all instances of the type with the given IDs.
T	findOne(ID id) Retrieves an entity by its id.
<S extends T> Iterable<S>	save(Iterable<S> entities) Saves all given entities.
<S extends T> S	save(S entity) Saves a given entity.

Method Detail

save

<S extends T> S save(S entity)

Saves a given entity. Use the returned instance for further operations as the save operation might have changed the entity instance completely.

Parameters:

entity -

Returns:

the saved entity

save

<S extends T> Iterable<S> save(Iterable<S> entities)

Saves all given entities.

Parameters:

entities -

Returns:

the saved entities

Throws:

IllegalArgumentException - in case the given entity is null.

findOne

T findOne(ID id)

Retrieves an entity by its id.

Parameters:

id - must not be null.

Returns:

the entity with the given id or null if none found

Throws:

IllegalArgumentException - if id is null

exists

boolean exists(ID id)

Returns whether an entity with the given id exists.

Parameters:

id - must not be null.

Returns:

true if an entity with the given id exists, false otherwise

Throws:

IllegalArgumentException - if id is null

findAll

Iterable<T> findAll()

Returns all instances of the type.

Returns:

all entities

findAll

Iterable<T> findAll(Iterable<ID> ids)

Returns all instances of the type with the given IDs.

Parameters:

ids -

Returns:

count

long count()

Returns the number of entities available.

Returns:

the number of entities

delete

void delete(ID id)

Deletes the entity with the given id.

Parameters:

id - must not be null.

Throws:

IllegalArgumentException - in case the given id is null

delete

void delete(T entity)

Deletes a given entity.

Parameters:

entity -

Throws:

IllegalArgumentException - in case the given entity is null.

delete

void delete(Iterable<? extends T> entities)

Deletes the given entities.

Parameters:

entities -

Throws:

IllegalArgumentException - in case the given Iterable is null.

deleteAll

void deleteAll()

Deletes all entities managed by the repository.