HibernateJpaVendorAdapter.java 文件源码

/**
 * Determine the Hibernate database dialect class for the given target database.
 * @param database the target database
 * @return the Hibernate database dialect class, or {@code null} if none found
 */
@SuppressWarnings("deprecation")
protected Class<?> determineDatabaseDialectClass(Database database) {
    switch (database) {
        case DB2: return DB2Dialect.class;
        case DERBY: return DerbyDialect.class;  // DerbyDialect deprecated in 4.x
        case H2: return H2Dialect.class;
        case HSQL: return HSQLDialect.class;
        case INFORMIX: return InformixDialect.class;
        case MYSQL: return MySQLDialect.class;
        case ORACLE: return Oracle9iDialect.class;
        case POSTGRESQL: return PostgreSQLDialect.class;  // PostgreSQLDialect deprecated in 4.x
        case SQL_SERVER: return SQLServerDialect.class;
        case SYBASE: return org.hibernate.dialect.SybaseDialect.class;  // SybaseDialect deprecated in 3.6 but not 4.x
        default: return null;
    }
}