interfaces vs concrete classes in HQL

bennini · **Joined:** Sun Aug 22, 2004 11:00 am **Posts:** 21

Hibernate version:
2.1

is there some way to use inteface names in HQL instead of the concrete classes that are actually persisted?

i have a User interface and a UserImpl concrete class

i would like to be able to perform a 'find' such as the following:

Code:

User user=(User)session.find("from User as user where user.username=?", username, Hibernate.STRING);

Code:

<hibernate-mapping>

   <class name="friendnetwork.UserImpl" table="User">

      <id name="id">
         <generator class="foreign">
            <param name="property">blog</param>
         </generator>
      </id>

      <property name="username" unique="true"/>
      <property name="password"/>
      <property name="firstname"/>
      <property name="surname"/>
      <property name="email"/>
      <property name="created"/>
      <property name="modified"/>

      <one-to-one name="blog" class="friendnetwork.blog.BlogImpl" cascade="all"/>

   </class>
</hibernate-mapping>

bennini · **Joined:** Sun Aug 22, 2004 11:00 am **Posts:** 21

nevermind i figured it out.

one has to specify the fully qualified class name of the interface in the HQL. duh. such as:

Code:

User user = session.find("from friendnetwork.User as user where user.username=?", username, Hibernate.STRING);

gavin · **Posted:** Sat Sep 25, 2004 7:47 pm

There is also the <import/> mapping element.