net.dontdrinkandroot.persistence.dao

Interface GenericDao

All Known Subinterfaces:

TypedDao<E,K>

All Known Implementing Classes:

GenericJpaDao, TypedJpaDao

public interface GenericDao

General contract of a Data Access Object that manages Entity instances.

Author:

Philip W. Sorst

Method Summary

Methods

Modifier and Type	Method and Description
<E extends Entity<K>,K> void	delete(E entity, Class<E> clazz) Deletes the given entity of the given class.
<E extends Entity<K>,K> void	delete(K id, Class<E> clazz) Deletes the entity with the given id of the given class.
<E extends Entity<K>,K> E	find(K id, Class<E> clazz) Finds the entity with the given id of the given class.
<E extends Entity<K>,K> List<E>	findAll(Class<E> clazz) Finds all entities of the given class.
<E extends Entity<K>,K> long	getCount(Class<E> clazz) Counts the entities of the given class.
<E extends Entity<K>,K> E	load(K id, Class<E> clazz) Loads the entity with the given id of the given class or throws an Exception if it was not found.
<E extends Entity<K>,K> E	save(E entity) Saves the given entity.

Method Detail

save

<E extends Entity<K>,K> E save(E entity)

Saves the given entity.

Returns:

The saved instance of the entity.

delete

<E extends Entity<K>,K> void delete(E entity,
                                  Class<E> clazz)

Deletes the given entity of the given class.

delete

<E extends Entity<K>,K> void delete(K id,
                                  Class<E> clazz)

Deletes the entity with the given id of the given class.

find

<E extends Entity<K>,K> E find(K id,
                             Class<E> clazz)

Finds the entity with the given id of the given class.

findAll

<E extends Entity<K>,K> List<E> findAll(Class<E> clazz)

Finds all entities of the given class.

load

<E extends Entity<K>,K> E load(K id,
                             Class<E> clazz)

Loads the entity with the given id of the given class or throws an Exception if it was not found.

getCount

<E extends Entity<K>,K> long getCount(Class<E> clazz)

Counts the entities of the given class.