Package NTNU.IDATT1002.repository

Interface Repository<T,ID>

Type Parameters:

T - type of entity

ID - type of entity id

All Known Implementing Classes:

AbstractRepository, AlbumRepository, GeoLocatioRepository, ImageRepository, LoginRepository, MetadataRepository, PagingAndSortingRepository, TagRepository, UserRepository

public interface Repository<T,ID>

Entity Repository Interface. Supports regular Create, Read, Update and Delete operations.

Version:

1.1 19.03.20

Method Summary

Modifier and Type	Method	Description
void	delete(T entity)	Deletes the given entity.
void	deleteById(ID id)	Deletes an entity with the given id.
java.util.List<?>	findAll()	Retrieves all instances of the type.
java.util.Optional<T>	findById(ID id)	Retrieves an entity with the given id.
java.util.Optional<T>	save(T entity)	Saves a given entity and returns the saved instance.
java.util.Optional<T>	update(T entity)	Updates a given entity and returns the updated instance.

Method Details

save

java.util.Optional<T> save(T entity)

Saves a given entity and returns the saved instance.

Parameters:

entity - not null

Returns:

the saved entity

update

java.util.Optional<T> update(T entity)

Updates a given entity and returns the updated instance.

Parameters:

entity - not null

Returns:

the updated entity

findAll

java.util.List<?> findAll()

Retrieves all instances of the type.

Returns:

all entities

findById

java.util.Optional<T> findById(ID id)

Retrieves an entity with the given id.

Parameters:

id - not null

Returns:

the entity with the given id if found, else Optional.empty()

delete

void delete(T entity)

Deletes the given entity.

Parameters:

entity - not null

deleteById

void deleteById(ID id)

Deletes an entity with the given id.

Parameters:

id - not null