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HibernateJpaDialect (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.orm.jpa.vendor
Class HibernateJpaDialect

java.lang.Object
  org.springframework.orm.jpa.DefaultJpaDialect
      org.springframework.orm.jpa.vendor.HibernateJpaDialect

All Implemented Interfaces:

PersistenceExceptionTranslator, JpaDialect

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public class HibernateJpaDialect
extends DefaultJpaDialect

JpaDialect implementation for Hibernate EntityManager. Developed and tested against Hibernate 3.2.

Since:

2.0

Author:

Costin Leau, Juergen Hoeller

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Constructor Summary
HibernateJpaDialect()

 

Method Summary
Object	beginTransaction(javax.persistence.EntityManager entityManager, TransactionDefinition definition)           This implementation invokes the standard JPA Transaction.begin method.
void	cleanupTransaction(Object transactionData)           This implementation does nothing, since the default beginTransaction implementation does not require any cleanup.
ConnectionHandle	getJdbcConnection(javax.persistence.EntityManager entityManager, boolean readOnly)           This implementation always returns null, indicating that no JDBC Connection can be provided.
protected  Session	getSession(javax.persistence.EntityManager em)

 

Methods inherited from class org.springframework.orm.jpa.DefaultJpaDialect
getEntityManagerFactoryPlusOperations, getEntityManagerPlusOperations, releaseJdbcConnection, supportsEntityManagerFactoryPlusOperations, supportsEntityManagerPlusOperations, translateExceptionIfPossible

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Constructor Detail

HibernateJpaDialect

public HibernateJpaDialect()

Method Detail

beginTransaction

public Object beginTransaction(javax.persistence.EntityManager entityManager,
                               TransactionDefinition definition)
                        throws javax.persistence.PersistenceException,
                               SQLException,
                               TransactionException

Description copied from class: DefaultJpaDialect

This implementation invokes the standard JPA Transaction.begin method. Throws an InvalidIsolationLevelException if a non-default isolation level is set.

This implementation does not return any transaction data Object, since there is no state to be kept for a standard JPA transaction. Hence, subclasses do not have to care about the return value (null) of this implementation and are free to return their own transaction data Object.

Specified by:

beginTransaction in interface JpaDialect

Overrides:

beginTransaction in class DefaultJpaDialect

Parameters:

entityManager - the EntityManager to begin a JPA transaction on

definition - the Spring transaction definition that defines semantics

Returns:

an arbitrary object that holds transaction data, if any (to be passed into cleanupTransaction)

Throws:

javax.persistence.PersistenceException - if thrown by JPA methods

SQLException - if thrown by JDBC methods

TransactionException - in case of invalid arguments

See Also:

EntityTransaction.begin(), InvalidIsolationLevelException, DefaultJpaDialect.cleanupTransaction(java.lang.Object)

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cleanupTransaction

public void cleanupTransaction(Object transactionData)

Description copied from class: DefaultJpaDialect

This implementation does nothing, since the default beginTransaction implementation does not require any cleanup.

Specified by:

cleanupTransaction in interface JpaDialect

Overrides:

cleanupTransaction in class DefaultJpaDialect

Parameters:

transactionData - arbitrary object that holds transaction data, if any (as returned by beginTransaction)

See Also:

DefaultJpaDialect.beginTransaction(javax.persistence.EntityManager, org.springframework.transaction.TransactionDefinition)

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getJdbcConnection

public ConnectionHandle getJdbcConnection(javax.persistence.EntityManager entityManager,
                                          boolean readOnly)
                                   throws javax.persistence.PersistenceException,
                                          SQLException

Description copied from class: DefaultJpaDialect

This implementation always returns null, indicating that no JDBC Connection can be provided.

Specified by:

getJdbcConnection in interface JpaDialect

Overrides:

getJdbcConnection in class DefaultJpaDialect

Parameters:

entityManager - the current JPA EntityManager

Returns:

a handle for the JDBC Connection, to be passed into releaseJdbcConnection, or null if no JDBC Connection can be retrieved

Throws:

javax.persistence.PersistenceException - if thrown by JPA methods

SQLException - if thrown by JDBC methods

See Also:

JpaDialect.releaseJdbcConnection(org.springframework.jdbc.datasource.ConnectionHandle, javax.persistence.EntityManager), ConnectionHandle.getConnection(), SimpleConnectionHandle, JpaTransactionManager.setDataSource(javax.sql.DataSource), NativeJdbcExtractor

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getSession

protected Session getSession(javax.persistence.EntityManager em)

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