de.alpharogroup.db.dao.api

Interface GenericDao<T extends BaseEntity<PK>,PK extends Serializable>

Type Parameters:

T - the type of the domain object

PK - the type of the primary key from the domain object

All Superinterfaces:

Serializable

All Known Subinterfaces:

EntityManagerDao<T,PK>, SessionFactoryDao<T,PK>

All Known Implementing Classes:

GenericHibernateDao, JpaEntityManagerDao

public interface GenericDao<T extends BaseEntity<PK>,PK extends Serializable>
extends Serializable

Generic DAO class.

Author:

Asterios Raptis

Method Summary

Modifier and Type	Method and Description
void	delete(List<T> objects) Delete all persistent objects in the given list.
void	delete(PK id) Deletes an object of a given Id.
void	delete(T object) Deletes the given object from persistent storage in the database.
void	evict(T object) Remove this instance from the session cache.
boolean	exists(PK id) Checks if an entry exists with the given id.
List<T>	findAll() Returns a list of all persistent objects.
T	get(PK id) Retrieve a persisted object with a given id from the database.
Class<T>	getType() Gets the class type.
T	load(PK id) Retrieve a persisted object with a given id from the database.
List<T>	merge(List<T> objects) Merges all new objects in the given list.
T	merge(T object) Merges the given object.
void	refresh(T object) Re-read the state of the given instance from the underlying database.
List<PK>	save(List<T> objects) Save all new objects in the given list.
PK	save(T object) Persist the given object into database.
void	saveOrUpdate(List<T> objects) Save or update all transient objects in the given list.
void	saveOrUpdate(T object) Save or update the given persistent object.
void	update(List<T> objects) Update all transient objects in the given list.
void	update(T object) Update changes made to the given object.

Method Detail

delete

void delete(List<T> objects)

Delete all persistent objects in the given list.

Parameters:

objects - the list with the persistent objects to delete

delete

void delete(PK id)

Deletes an object of a given Id. Will load the object internally so consider using delete (T obj) directly

Parameters:

id - the id

delete

void delete(T object)

Deletes the given object from persistent storage in the database.

Parameters:

object - the persistent object

exists

boolean exists(PK id)

Checks if an entry exists with the given id.

Parameters:

id - the id to check

Returns:

true, if an entry exists with the given id, otherwise false.

evict

void evict(T object)

Remove this instance from the session cache.

Parameters:

object - the object to evict.

findAll

List<T> findAll()

Returns a list of all persistent objects.

Returns:

list of all persistent objects

get

T get(PK id)

Retrieve a persisted object with a given id from the database.

Parameters:

id - the id

Returns:

An object of type T

getType

Class<T> getType()

Gets the class type.

Returns:

the class type

load

T load(PK id)

Retrieve a persisted object with a given id from the database.

Parameters:

id - the id

Returns:

An object of type T

merge

T merge(T object)

Merges the given object. @see Hibernate documentation.

Parameters:

object - the object

Returns:

the object

merge

List<T> merge(List<T> objects)

Merges all new objects in the given list.

Parameters:

objects - the list to save

Returns:

the list with the ids of the merged objects

refresh

void refresh(T object)

Re-read the state of the given instance from the underlying database.

Parameters:

object - the object to re-read.

save

List<PK> save(List<T> objects)

Save all new objects in the given list.

Parameters:

objects - the list to save

Returns:

the list with the ids of the saved objects

save

PK save(T object)

Persist the given object into database.

Parameters:

object - the new instance to save.

Returns:

the id of the saved object

saveOrUpdate

void saveOrUpdate(List<T> objects)

Save or update all transient objects in the given list.

Parameters:

objects - the transient objects

saveOrUpdate

void saveOrUpdate(T object)

Save or update the given persistent object.

Parameters:

object - the transient object to save or update.

update

void update(List<T> objects)

Update all transient objects in the given list.

Parameters:

objects - the transient objects to update.

update

void update(T object)

Update changes made to the given object.

Parameters:

object - the transient object to update.