@AutoWired by type and by name if necessary

[schumnana]

Hi,

I have a question.

I have a generic DAO template class and I use it for all my tables in my database.

The declaration is like that.

@Repository
public final class GenericHibernateDao<T, ID extends Serializable>
implements GenericDao<T, ID>

I have something like that in applicationContext.xml

<!-- Generic Dao -->
<bean id="counterpartSampleDao"
class="sgcib.ged.testxfire.core.persistence.hibern ate.dao.GenericHibernateDao">
<property name="persistentClass">
<bean id="counterpartSampleClass" class="java.lang.Class"
factory-method="forName">
<constructor-arg>
<value>sgcib.ged.testxfire.core.persistence.hibern ate.domain.CounterpartSample</value>
</constructor-arg>
</bean>
</property>
</bean>


<bean id="dealSampleDao"
class="sgcib.ged.testxfire.core.persistence.hibern ate.dao.GenericHibernateDao">
<property name="persistentClass">
<bean id="dealSampleClass" class="java.lang.Class"
factory-method="forName">
<constructor-arg>
<value>sgcib.ged.testxfire.core.persistence.hibern ate.domain.DealSample</value>
</constructor-arg>
</bean>
</property>
</bean>

<bean id="productSampleDao"
class="sgcib.ged.testxfire.core.persistence.hibern ate.dao.GenericHibernateDao">
<property name="persistentClass">
<bean id="productSampleClass" class="java.lang.Class"
factory-method="forName">
<constructor-arg>
<value>sgcib.ged.testxfire.core.persistence.hibern ate.domain.ProductSample</value>
</constructor-arg>
</bean>
</property>
</bean-->



I want to wire them with @Autowire in my Business Components but it not possible because I have more than one bean for this generic Dao class (it is normal because @Autowired wire by type).

I want to know is it possible to wire by type and if there is more than one bean, to wire by name. I think it coud be a very cool feature.

It is like @Configurable annotation
(autowire=Autowire.BY_NAME)
(autowire=Autowire.BY_TYPE)
and add something like
(autowire=Autowire.BY_TYPE_AND_BY_NAME_IF_NECESSAR Y)
(the last constant is ugly, but I'm very bad to find good short name)

The last feature can also be add fto the @Configurable annotation.

[sbirnie]

Isn't that what @Resource(name="myBeanName") is supposed to do?

I'm still trying to get my appContext file to work right, so I can't be sure, but that was the way I interpreted the reference manual (p.86 - Section 3.10.2)

[schumnana]

I think you are right but I can find the annotation.

What is the package?

[sbirnie]

I just found it myself. It's not a spring annotation, but a java 5 annotation. You need to add the Java 5 EE libraries to your build path.

I still don't have it working yet, but at lease @Resource isn't causing a compile error for me anymore.

[Mark Fisher]

@Resource is actually bundled with Java 6 SE. Otherwise you need to add the common-annotations.jar to your classpath (it can be found in 'lib/j2ee' of the 2.1 distribution).