nl.knowledgeplaza.util.jpa
Class JpaUtil

java.lang.Object
  nl.knowledgeplaza.util.jpa.JpaUtil

Direct Known Subclasses:

EclipselinkUtil

public class JpaUtil
extends Object

Nested Class Summary

static interface

JpaUtil.JpaEntityInformation Used a.o. by JpaObjectNavigatorModel to decide whether to do a merge or persist upon save

Field Summary

static String

SOURCECODE_VERSION Standard variable for determining version of a class file.

Constructor Summary

JpaUtil()

Method Summary

static void	clear() Clean the active EntityManager and the associated EntityManagerChangeCount
static void	clear(javax.persistence.EntityManager lEntityManager) Clean the EntityManager and the associated EntityManagerChangeCount
static void	clear2ndLevelCache(javax.persistence.EntityManagerFactory emf) Invalidate second level cache
static void	close(javax.persistence.EntityManager entityManager)
static void	close(javax.persistence.EntityManagerFactory entityManagerFactory)
static List<Class>	collectEntityClasses(InputStream persistenceXmlInputStream)
static Connection	getJdbcConnection(javax.persistence.EntityManager entityManager) Get JDBC connection.
static Object	getSingleResultOrDefault(javax.persistence.Query lQuery, Object d) getSingleResult throws an exception if nothing is found.
static Object	getSingleResultOrNull(javax.persistence.Query lQuery) getSingleResult throws an exception if nothing is found.
static Object	mergeImmediately(javax.persistence.EntityManager entityManager, Object entity) Persist an offline object by starting a transaction and merging the entity
static Object	mergeImmediately(Object entity)
static void	persistImmediately() persist all offline but persisted entities
static void	persistImmediately(javax.persistence.EntityManager entityManager) persist entity
static void	persistImmediately(javax.persistence.EntityManager entityManager, Object entity) Persist an offline object by starting a transaction and persisting the entity
static void	persistImmediately(Object entity) persist entity
static void	removeImmediately(javax.persistence.EntityManager entityManager, Object entity) Persist an offline object by starting a transaction and merging the entity
static void	removeImmediately(Object entity)
static javax.persistence.EntityManager	stripEntityManager(javax.persistence.EntityManager entityManager) Cast to JpaEntityManager, but first see if this is the EntityManagerExtender proxy

Methods inherited from class java.lang.Object

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

Field Detail

SOURCECODE_VERSION

public static final String SOURCECODE_VERSION

Standard variable for determining version of a class file.

See Also:

Constant Field Values

Constructor Detail

JpaUtil

public JpaUtil()

Method Detail

stripEntityManager

public static javax.persistence.EntityManager stripEntityManager(javax.persistence.EntityManager entityManager)

Cast to JpaEntityManager, but first see if this is the EntityManagerExtender proxy

Parameters:

entityManager -

Returns:

persistImmediately

public static void persistImmediately(javax.persistence.EntityManager entityManager,
                                      Object entity)

Persist an offline object by starting a transaction and persisting the entity

persistImmediately

public static void persistImmediately(Object entity)

persist entity

Parameters:

entity -

persistImmediately

public static void persistImmediately(javax.persistence.EntityManager entityManager)

persist entity

Parameters:

entity -

persistImmediately

public static void persistImmediately()

persist all offline but persisted entities

mergeImmediately

public static Object mergeImmediately(javax.persistence.EntityManager entityManager,
                                      Object entity)

Persist an offline object by starting a transaction and merging the entity

mergeImmediately

public static Object mergeImmediately(Object entity)

removeImmediately

public static void removeImmediately(javax.persistence.EntityManager entityManager,
                                     Object entity)

Persist an offline object by starting a transaction and merging the entity

removeImmediately

public static void removeImmediately(Object entity)

clear

public static void clear(javax.persistence.EntityManager lEntityManager)

Clean the EntityManager and the associated EntityManagerChangeCount

clear

public static void clear()

Clean the active EntityManager and the associated EntityManagerChangeCount

getSingleResultOrNull

public static Object getSingleResultOrNull(javax.persistence.Query lQuery)

getSingleResult throws an exception if nothing is found. The method returns null in that case.

Parameters:

lQuery -

Returns:

getSingleResultOrDefault

public static Object getSingleResultOrDefault(javax.persistence.Query lQuery,
                                              Object d)

getSingleResult throws an exception if nothing is found. The method returns the default in that case.

Parameters:

lQuery -

Returns:

getJdbcConnection

public static Connection getJdbcConnection(javax.persistence.EntityManager entityManager)

Get JDBC connection. You should be in a JPA transaction to access the Connection. Otherwise, you will be responsible for releasing the connection.

Parameters:

entityManager -

Returns:

clear2ndLevelCache

public static void clear2ndLevelCache(javax.persistence.EntityManagerFactory emf)

Invalidate second level cache

Parameters:

EntityManagerFactory - (hint: em.getEntityManagerFactory() )

collectEntityClasses

public static List<Class> collectEntityClasses(InputStream persistenceXmlInputStream)
                                        throws IOException

Throws:

IOException

close

public static void close(javax.persistence.EntityManager entityManager)

Parameters:

entityManager -

close

public static void close(javax.persistence.EntityManagerFactory entityManagerFactory)

Parameters:

entityManagerFactory -