org.jdal.dao

Interface Dao<T,PK extends Serializable>

All Superinterfaces:

PageableDataSource<T>

All Known Subinterfaces:

PersistentService<T,PK>, ReportDao, ReportService, UserPreferenceDao

All Known Implementing Classes:

CollectionPersistenceService, ContextPersistentManager, DaoSupport, HibernateDao, HibernateReportDao, HibernateUserPreferenceDao, JpaDao, JpaUserPreferenceDao, PersistentManager, PersistentServiceJpaDao, ReportManager

public interface Dao<T,PK extends Serializable>
extends PageableDataSource<T>

Generic DAO with pageable datasource interface.

Author:

Jose Luis Martin - (jlm@joseluismartin.info)

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(Collection<T> collection) Delete a collection of entities
void	delete(T entity) Delete an entity
void	deleteById(Collection<PK> ids) Delete a collection of Ids.
void	deleteById(PK id) Delete an object by primary key
boolean	exists(PK id) Checks for existence of an object of type T using the id arg.
List<T>	findByNamedQuery(String queryName, Map<String,Object> queryParams) Find a list of records by using a named query
T	get(PK id) Find object by id
<E> E	get(PK id, Class<E> clazz)
List<T>	getAll() Get all models
<E> List<E>	getAll(Class<E> clazz)
Class<T>	getEntityClass() Return the entity class
T	initialize(T entity) Initalize entity at default depth
T	initialize(T entity, int depth) Initalize entity
Collection<T>	save(Collection<T> collection) Save a collection entity
T	save(T object) Save or update an object

Methods inherited from interface org.jdal.dao.PageableDataSource

getKeys, getPage

Method Detail

getAll

List<T> getAll()

Get all models

Returns:

List of entities

get

T get(PK id)

Find object by id

Parameters:

id - the identifier (primary key) of the object to get

Returns:

entity or null if none

exists

boolean exists(PK id)

Checks for existence of an object of type T using the id arg.

Parameters:

id - the id of the entity

Returns:

- true if it exists, false if it doesn't

save

T save(T object)

Save or update an object

Parameters:

object - the object to save

Returns:

the persisted object

deleteById

void deleteById(PK id)

Delete an object by primary key

Parameters:

id - the primary key

delete

void delete(T entity)

Delete an entity

Parameters:

entity - to delete

findByNamedQuery

List<T> findByNamedQuery(String queryName,
                       Map<String,Object> queryParams)

Find a list of records by using a named query

Parameters:

queryName - query name of the named query

queryParams - a map of the query names and the values

Returns:

a list of the records found

initialize

T initialize(T entity)

Initalize entity at default depth

Parameters:

entity - to intialize

Returns:

intialized entity

initialize

T initialize(T entity,
           int depth)

Initalize entity

Parameters:

entity - to intialize

depth - to descend.

Returns:

intialized entity

save

Collection<T> save(Collection<T> collection)

Save a collection entity

Parameters:

collection - collectin to save

Returns:

the persisted collection.

delete

void delete(Collection<T> collection)

Delete a collection of entities

Parameters:

collection - collectin to delete

deleteById

void deleteById(Collection<PK> ids)

Delete a collection of Ids.

Parameters:

ids - ids to delete

get

<E> E get(PK id,
        Class<E> clazz)

getAll

<E> List<E> getAll(Class<E> clazz)

getEntityClass

Class<T> getEntityClass()

Return the entity class

Returns:

the entity class handled for this DAO, Maybe Object.class