org.apache.juneau.examples.rest.petstore

Class AbstractPersistenceService

java.lang.Object

org.apache.juneau.examples.rest.petstore.AbstractPersistenceService

Direct Known Subclasses:

PetStoreService

public class AbstractPersistenceService
extends Object

Superclass for DAOs that use the JPA entity manager.

Constructor Summary

Constructors

Constructor and Description
AbstractPersistenceService()

Method Summary

Modifier and Type	Method and Description
protected <T> T	find(Class<T> t, Object id) Same as find(EntityManager, Class, Object) but uses a new entity manager.
protected <T> T	find(javax.persistence.EntityManager em, Class<T> t, Object id) Retrieves the specified JPA bean from the repository.
protected javax.persistence.EntityManager	getEntityManager() Retrieves an entity manager session.
protected <T> Collection<T>	merge(Collection<T> c) Same as merge(EntityManager, Collection) but uses a new entity manager.
protected <T> Collection<T>	merge(javax.persistence.EntityManager em, Collection<T> c) Store the specified JPA beans in the repository.
protected <T> T	merge(javax.persistence.EntityManager em, T t) Store the specified JPA bean in the repository.
protected <T> T	merge(T t) Same as merge(EntityManager, Object) but uses a new entity manager.
protected <T> List<T>	query(javax.persistence.EntityManager em, String query, Class<T> t, Map<String,Object> params) Runs a JPA parameterized query and returns the results.
protected <T> List<T>	query(javax.persistence.EntityManager em, String query, Class<T> t, SearchArgs searchArgs) Runs a JPA query and returns the results.
protected <T> List<T>	query(String query, Class<T> t, Map<String,Object> params) Same as query(EntityManager,String,Class,Map) but uses a new entity manager.
protected <T> List<T>	query(String query, Class<T> t, SearchArgs searchArgs) Same as query(EntityManager,String,Class,SearchArgs) but uses a new entity manager.
protected <T> void	remove(Class<T> t, Object id) Remove the specified JPA bean from the repository.
protected <T> void	remove(javax.persistence.EntityManager em, T t) Remove the specified JPA bean from the repository.
protected int	update(javax.persistence.EntityManager em, String query) Runs a JPA update statement.
protected int	update(javax.persistence.EntityManager em, String query, Map<String,Object> params) Runs a JPA parameterized update statement.
protected int	update(String query) Same as update(EntityManager,String) but uses a new entity manager.
protected int	update(String query, Map<String,Object> params) Same as update(EntityManager,String,Map) but uses a new entity manager.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractPersistenceService

public AbstractPersistenceService()

Method Detail

getEntityManager

protected javax.persistence.EntityManager getEntityManager()

Retrieves an entity manager session.

find

protected <T> T find(javax.persistence.EntityManager em,
                     Class<T> t,
                     Object id)

Retrieves the specified JPA bean from the repository.

Parameters:

em - The entity manager to use to retrieve the bean.

t - The bean type to retrieve.

id - The primary key value.

Returns:

The JPA bean, or null if not found.

find

protected <T> T find(Class<T> t,
                     Object id)

Same as find(EntityManager, Class, Object) but uses a new entity manager.

Parameters:

t - The bean type to retrieve.

id - The primary key value.

Returns:

The JPA bean, or null if not found.

merge

protected <T> T merge(javax.persistence.EntityManager em,
                      T t)

Store the specified JPA bean in the repository.

Parameters:

em - The entity manager to use to store and merge the bean.

t - The bean to store.

Returns:

The merged JPA bean returned by the EntityManager.merge(Object) method, or null if the bean was null.

merge

protected <T> T merge(T t)

Same as merge(EntityManager, Object) but uses a new entity manager.

Parameters:

t - The bean to store.

Returns:

The merged JPA bean returned by the EntityManager.merge(Object) method, or null if the bean was null.

merge

protected <T> Collection<T> merge(javax.persistence.EntityManager em,
                                  Collection<T> c)

Store the specified JPA beans in the repository. All values are persisted in the same transaction.

Parameters:

em - The entity manager to use to store and merge the beans.

c - The collection of beans to store.

Returns:

The merged JPA beans returned by the EntityManager.merge(Object) method.

merge

protected <T> Collection<T> merge(Collection<T> c)

Same as merge(EntityManager, Collection) but uses a new entity manager.

Parameters:

c - The collection of beans to store.

Returns:

The merged JPA beans returned by the EntityManager.merge(Object) method.

remove

protected <T> void remove(Class<T> t,
                          Object id)

Remove the specified JPA bean from the repository.

Parameters:

t - The bean type to remove.

id - The primary key value.

remove

protected <T> void remove(javax.persistence.EntityManager em,
                          T t)

Remove the specified JPA bean from the repository.

Parameters:

em - The entity manager used to retrieve the bean.

t - The bean to remove. Can be null.

query

protected <T> List<T> query(javax.persistence.EntityManager em,
                            String query,
                            Class<T> t,
                            SearchArgs searchArgs)

Runs a JPA query and returns the results.

Parameters:

em - The entity manager to use to retrieve the beans.

query - The JPA query.

t - The bean type.

query

protected <T> List<T> query(String query,
                            Class<T> t,
                            SearchArgs searchArgs)

Same as query(EntityManager,String,Class,SearchArgs) but uses a new entity manager.

Parameters:

query - The JPA query.

t - The bean type.

query

protected <T> List<T> query(javax.persistence.EntityManager em,
                            String query,
                            Class<T> t,
                            Map<String,Object> params)

Runs a JPA parameterized query and returns the results.

Parameters:

em - The entity manager to use to retrieve the beans.

query - The JPA query.

t - The bean type.

params - The query parameter values.

query

protected <T> List<T> query(String query,
                            Class<T> t,
                            Map<String,Object> params)

Same as query(EntityManager,String,Class,Map) but uses a new entity manager.

Parameters:

query - The JPA query.

t - The bean type.

params - The query parameter values.

update

protected int update(javax.persistence.EntityManager em,
                     String query)

Runs a JPA update statement.

Parameters:

em - The entity manager to use to run the statement.

query - The JPA update statement.

Returns:

The number of rows modified.

update

protected int update(String query)

Same as update(EntityManager,String) but uses a new entity manager.

Parameters:

query - The JPA update statement.

Returns:

The number of rows modified.

update

protected int update(javax.persistence.EntityManager em,
                     String query,
                     Map<String,Object> params)

Runs a JPA parameterized update statement.

Parameters:

em - The entity manager to use to run the statement.

query - The JPA update statement.

params - The query parameter values.

Returns:

The number of rows modified.

update

protected int update(String query,
                     Map<String,Object> params)

Same as update(EntityManager,String,Map) but uses a new entity manager.

Parameters:

query - The JPA update statement.

params - The query parameter values.

Returns:

The number of rows modified.