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HibernateJpaDialect (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

The Spring Framework

org.springframework.orm.jpa.vendor
Class HibernateJpaDialect

java.lang.Object
  extended by org.springframework.orm.jpa.DefaultJpaDialect
      extended by org.springframework.orm.jpa.vendor.HibernateJpaDialect
All Implemented Interfaces:
PersistenceExceptionTranslator, JpaDialect

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

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)

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)

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

getSession

protected Session getSession(javax.persistence.EntityManager em)

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