Java5中的HQL到SQL
是否可以在运行时使用EntityManager将HSQL语句转换为SQL 我找到了这个解决方案,但我没有sessionFactory,我有EntityManagerJava5中的HQL到SQL,java,sql,hibernate,jakarta-ee,Java,Sql,Hibernate,Jakarta Ee,是否可以在运行时使用EntityManager将HSQL语句转换为SQL 我找到了这个解决方案,但我没有sessionFactory,我有EntityManager protected String toSql(String hqlQueryText) { if (sessionFactory != null && hqlQueryText != null && hqlQueryText.trim().length() > 0) {
protected String toSql(String hqlQueryText) {
if (sessionFactory != null && hqlQueryText != null && hqlQueryText.trim().length() > 0) {
final QueryTranslatorFactory translatorFactory = new ASTQueryTranslatorFactory();
final SessionFactoryImplementor factory = (SessionFactoryImplementor) sessionFactory;
final QueryTranslator translator = translatorFactory.createQueryTranslator(hqlQueryText, hqlQueryText,
Collections.EMPTY_MAP, factory);
translator.compile(Collections.EMPTY_MAP, false);
return translator.getSQLString();
}
return null;
}
如果您拥有EntityManager,则可以使用以下代码段获取SessionFactory:
EntityManager em = ...
SessionFactory sf = ((EntityManagerFactoryImpl)em.getEntityManagerFactory()).getSessionFactory();
抱歉,我在EntityManager API中找不到GetEntityManager Factory,它自JPA 2.0以来就可用。见: