au.org.consumerdatastandards.holder.repository

Interface ReadOnlyRepository<T,ID>

All Superinterfaces:

org.springframework.data.repository.Repository<T,ID>

@NoRepositoryBean
public interface ReadOnlyRepository<T,ID>
extends org.springframework.data.repository.Repository<T,ID>

Method Summary

Modifier and Type	Method and Description
long	count() Returns the number of entities available.
boolean	existsById(ID id) Returns whether an entity with the given id exists.
Iterable<T>	findAll() Returns all instances of the type.
Iterable<T>	findAllById(Iterable<ID> ids) Returns all instances of the type with the given IDs.
Optional<T>	findById(ID id) Retrieves an entity by its id.

Method Detail

findById

Optional<T> findById(ID id)

Retrieves an entity by its id.

Parameters:

id - must not be null.

Returns:

the entity with the given id or Optional#empty() if none found

Throws:

IllegalArgumentException - if id is null.

existsById

boolean existsById(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

findAllById

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

Returns all instances of the type with the given IDs.

Parameters:

ids - entity ids

Returns:

all entities specified by the ids

count

long count()

Returns the number of entities available.

Returns:

the number of entities