如何使用注释以编程方式在hibernate中验证数据库模式？

Question

看来org.hibernate.cfg.Configuration对象可以通过调用validateSchema方法以编程方式执行验证.但是,此方法需要dialect和databaseMetadata对象.我正在使用Spring,我可以从spring上下文中获取AnnotationSessionFactoryBean对象.到目前为止,我有以下代码:

    AnnotationSessionFactoryBean factory = null;
    factory = (AnnotationSessionFactoryBean) context.getBean("AnnotationSessionFactory");
    Configuration configuration = factory.getConfiguration();

    //the following line does not work, ConnectionHelper hierarchy is not visible outside the package
    ConnectionHelper connectionHelper =  
   new ManagedConnectionProviderConnectionHelper(factory.getHibernateProperties());

    Dialect dialect = Dialect.getDialect(factory.getHibernateProperties());
    Connection connection = null;
    DatabaseMetadata databaseMetadata = null;
    try {
        databaseMetadata = new DatabaseMetadata(connection, dialect);
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    configuration.validateSchema(dialect, databaseMetadata);

我是在正确的轨道上吗？ConnectionHelper层次结构在包外不可见,因此我无法以这种方式获取连接对象,以构建databaseMetadata.我该如何实现呢？

编辑:我想我已经取得了一些进展.有一个SchemaValidator类.代码现在看起来像这样:

AnnotationSessionFactoryBean factory = context.getBean("&AnnotationSessionFactory");
Configuration configuration = factory.getConfiguration();       
SchemaValidator validator = new SchemaValidator(configuration);
validator.validate();       

Howerver,现在我收到以下错误:

org.hibernate.HibernateException:找不到配置的本地DataSource - 必须在LocalSessionFactoryBean上设置'dataSource'属性

Answer 1

最后，当使用 Spring 时，事情就没那么简单了。我设法像这样扩展 AnnotationSessionFactoryBean：

public class SchemaValidatingAnnotationSessionFactoryBean extends
    AnnotationSessionFactoryBean {

public void validateDatabaseSchema() throws DataAccessException {
    logger.info("Validating database schema for Hibernate SessionFactory");
    HibernateTemplate hibernateTemplate = new HibernateTemplate(
            getSessionFactory());
    hibernateTemplate.setFlushMode(HibernateTemplate.FLUSH_NEVER);
    hibernateTemplate.execute(new HibernateCallback() {
        public Object doInHibernate(Session session)
                throws HibernateException, SQLException {
            Connection con = session.connection();
            Dialect dialect = Dialect.getDialect(getConfiguration()
                    .getProperties());
            DatabaseMetadata metadata = new DatabaseMetadata(con, dialect);
            Configuration configuration = getConfiguration();
            configuration.validateSchema(dialect, metadata);
            return null;
        }
    });

}
}