Type Mismatch

[Ciccio17]

Do you see any mistake in this piece of code?

This is my netbeans error message:

Error creating bean with name 'facadeAvvisi' defined in file [...\web\WEB-INF\applicationContext.xml]: Error setting property values;
 nested exception is org.springframework.beans.NotWritablePropertyException:
 Invalid property 'aDao' of bean class [...sistema.FacadeAvvisi]:
 Bean property 'aDao' is not writable or has an invalid setter method:
 Does the parameter type of the setter match the return type of the getter?

this is a piece of the ApplicationContext.xml:

<bean id="facadeAvvisi" class="org.apache.shale.progettotesi.sistema.FacadeAvvisi">
        <property name="aDao">
            <ref bean="avvisoDao"></ref>
        </property>
</bean>

...

<bean id="avvisoDao" class="org.apache.shale.progettotesi.persistenza.impl.AvvisoDaoImpl">
        <property name="dataSource">
            <ref bean="dataSource"></ref>
        </property>
</bean>

and these are my java class(only a piece..):

public class FacadeAvvisi{

private AvvisoDao aDao;
//getter and setter
}

public interface AvvisoDao {
    ...
}

public class AvvisoDaoImpl extends JdbcDaoSupport implements AvvisoDao, RowCallbackHandler{
...
}

It seems that there is a type mismatch between the property in the AppContext.xml and the java variable.But actually it isn't..

thanks 4 help

[orusso]

can u post the setter?

[Andreas Senft]

You left out the interesting part

Can you post the getter and setter of the Dao?

Regards,
Andreas

[Ciccio17]

this are getter/setter of facadeAvvisi:

public class FacadeAvvisi {
    
    private AvvisoDao aDao;
..
public AvvisoDao getADao() {
        return aDao;
    }

    public void setADao(AvvisoDao aDao) {
        this.aDao = aDao;
    }
..
}

[Andreas Senft]

That's a special case of the JavaBeans specification. Normally, if you have a property named "dao", the according setter will be "setDao" (note the case).
If, however, a property name starts with two uppercase letters, then it stands as is. So for your case, the correct property name (matching your getter/setter) is "ADao". Take this as name in your app context file, and things should work.

Regards,
Andreas

[Ciccio17]

thanks 4 help

[orusso]

or:

public class FacadeAvvisi {
    
    private AvvisoDao avvisoDao;
..
public AvvisoDao getAvvisoDao() {
        return avvisoDao;
    }

    public void setAvvisoDao(AvvisoDao aDao) {
        this.avvisoDao = aDao;
    }
..
}

and

<bean id="facadeAvvisi" class="org.apache.shale.progettotesi.sistema.FacadeAvvisi">
        <property name="avvisoDao">
            <ref bean="avvisoDao"></ref>
        </property>
</bean>