edu.msu.nscl.olog

Class JPAUtil

java.lang.Object

edu.msu.nscl.olog.JPAUtil

public class JPAUtil
extends Object

Author:

berryman

Constructor Summary

Constructors

Constructor and Description
JPAUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static void	copyCriteriaNoSelection(javax.persistence.criteria.CriteriaQuery<?> from, javax.persistence.criteria.CriteriaQuery<?> to, boolean withoutOrderBy) Copy Criteria without Selection
static void	copyFetches(javax.persistence.criteria.Fetch<?,?> from, javax.persistence.criteria.Fetch<?,?> to) Copy Fetches
static void	copyJoins(javax.persistence.criteria.From<?,?> from, javax.persistence.criteria.From<?,?> to) Copy Joins
static <T> Long	count(javax.persistence.EntityManager em, javax.persistence.criteria.CriteriaQuery<T> criteria) Result count from a CriteriaQuery
static <T> javax.persistence.criteria.CriteriaQuery<Long>	countCriteria(javax.persistence.EntityManager em, javax.persistence.criteria.CriteriaQuery<T> criteria) Create a row count CriteriaQuery from a CriteriaQuery
static Object	findByID(Class type, long id)
static <T> javax.persistence.criteria.Root<T>	findRoot(javax.persistence.criteria.CriteriaQuery<?> query, Class<T> clazz) Find the Root with type class on CriteriaQuery Root Set
static <T> javax.persistence.criteria.Root<T>	findRoot(javax.persistence.criteria.CriteriaQuery<T> query) Find Root of result type
static void	finishTransacton(javax.persistence.EntityManager em)
static javax.persistence.EntityManagerFactory	getEntityManagerFactory()
static <T> String	getOrCreateAlias(javax.persistence.criteria.Selection<T> selection) Gets The result alias, if none set a default one and return it
static void	remove(Class type, Long id)
static void	save(Object o)
static void	startTransaction(javax.persistence.EntityManager em)
static void	transactionFailed(javax.persistence.EntityManager em)
static Object	update(Object o)

Methods inherited from class java.lang.Object

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

Constructor Detail

JPAUtil

public JPAUtil()

Method Detail

getEntityManagerFactory

public static javax.persistence.EntityManagerFactory getEntityManagerFactory()

startTransaction

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

finishTransacton

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

transactionFailed

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

save

public static void save(Object o)

update

public static Object update(Object o)

remove

public static void remove(Class type,
          Long id)

findByID

public static Object findByID(Class type,
              long id)

count

public static <T> Long count(javax.persistence.EntityManager em,
             javax.persistence.criteria.CriteriaQuery<T> criteria)

Result count from a CriteriaQuery

Parameters:

em - Entity Manager

criteria - Criteria Query to count results

Returns:

row count

countCriteria

public static <T> javax.persistence.criteria.CriteriaQuery<Long> countCriteria(javax.persistence.EntityManager em,
                                                               javax.persistence.criteria.CriteriaQuery<T> criteria)

Create a row count CriteriaQuery from a CriteriaQuery

Parameters:

em - entity manager

criteria - source criteria

Returns:

row count CriteriaQuery

copyCriteriaNoSelection

public static void copyCriteriaNoSelection(javax.persistence.criteria.CriteriaQuery<?> from,
                           javax.persistence.criteria.CriteriaQuery<?> to,
                           boolean withoutOrderBy)

Copy Criteria without Selection

Parameters:

from - source Criteria

to - destination Criteria

getOrCreateAlias

public static <T> String getOrCreateAlias(javax.persistence.criteria.Selection<T> selection)

Gets The result alias, if none set a default one and return it

Parameters:

selection -

Returns:

root alias or generated one

findRoot

public static <T> javax.persistence.criteria.Root<T> findRoot(javax.persistence.criteria.CriteriaQuery<T> query)

Find Root of result type

Parameters:

query - criteria query

Returns:

the root of result type or null if none

findRoot

public static <T> javax.persistence.criteria.Root<T> findRoot(javax.persistence.criteria.CriteriaQuery<?> query,
                                              Class<T> clazz)

Find the Root with type class on CriteriaQuery Root Set

Type Parameters:

T - root type

Parameters:

query - criteria query

clazz - root type

Returns:

Root of null if none

copyJoins

public static void copyJoins(javax.persistence.criteria.From<?,?> from,
             javax.persistence.criteria.From<?,?> to)

Copy Joins

Parameters:

from - source Join

to - destination Join

copyFetches

public static void copyFetches(javax.persistence.criteria.Fetch<?,?> from,
               javax.persistence.criteria.Fetch<?,?> to)

Copy Fetches

Parameters:

from - source Fetch

to - dest Fetch