We are using more than one Persistence Unit e.g.

   <persistence-unit name="AdaptTemplates">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/AdaptTemplatesDatasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9Dialect"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/AdaptTemplatesEntityManagerFactory"/>
         <property name="hibernate.default_schema" value="J2EETST11"/>
      </properties>
   </persistence-unit>

   <persistence-unit name="AdaptTemplates2">
      <provider>org.hibernate.ejb.HibernatePersistence</provider>
      <jta-data-source>java:/AdaptTemplatesDatasource</jta-data-source>
      <properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.Oracle9Dialect"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
         <property name="jboss.entity.manager.factory.jndi.name" value="java:/AdaptTemplatesEntityManagerFactory2"/>
         <property name="hibernate.default_schema" value="J2EETST13"/>
      </properties>
   </persistence-unit>

Is there a way do config a default persistence unit, which is used when no unitName is entered in @PersistenceContext?

@PersistenceContext
private EntityManager em1;

@PersistenceContext(unitName="AdaptTemplates2")
private EntityManager em2;