org.mentawai.util
Class JPAHelper

java.lang.Object
  org.mentawai.util.JPAHelper

public class JPAHelper
extends Object

JPA Utilities Java Persistence API JSR 220 - http://jcp.org/aboutJava/communityprocess/final/jsr220/index.html

Author:

Fernando Boaglio

Constructor Summary

JPAHelper()

Method Summary

static javax.persistence.EntityManager	beginTransaction() get transaction start
static void	closeEntityManagerForQueries(javax.persistence.EntityManager em) Close EM for SELECTs
static void	commitTransaction(javax.persistence.EntityManager em) get transaction end
static boolean	existsJPAPersistenceUnit() Check if exists a defined persistence unit
static javax.persistence.EntityManager	getEntityManagerForQueries() Get EM for SELECTs
static void	setPersistenceUnit(String value) Set Persistence Unit value for ApplicationManager

Methods inherited from class java.lang.Object

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

Constructor Detail

JPAHelper

public JPAHelper()

Method Detail

setPersistenceUnit

public static void setPersistenceUnit(String value)

Set Persistence Unit value for ApplicationManager

Parameters:

value -

beginTransaction

public static javax.persistence.EntityManager beginTransaction()

get transaction start

Returns:

EntityManager

commitTransaction

public static void commitTransaction(javax.persistence.EntityManager em)

get transaction end

Parameters:

em -

getEntityManagerForQueries

public static javax.persistence.EntityManager getEntityManagerForQueries()

Get EM for SELECTs

Returns:

EntityManager

closeEntityManagerForQueries

public static void closeEntityManagerForQueries(javax.persistence.EntityManager em)

Close EM for SELECTs

existsJPAPersistenceUnit

public static boolean existsJPAPersistenceUnit()

Check if exists a defined persistence unit

Returns:

boolean