Autoproxy invalid cast

[jjarrel]

I am applying DebugInterceptor example to learn more about the autoproxy feature.

I have been able to successfully apply the DebugInterceptor using the ProxyFactory in code. Now I want to try and do it with an autoproxy configuration.

It seems easy enough but I get an invalid cast exception.

Any advice?

Thanks,
jeff

System.InvalidCastException: Unable to cast object of type 'CompositionAopProxy_34cf5a029be14c439e4d8755fb96c 726' to type 'PW3Info.baseelement.data.BaseElement'.

BaseElement myBaseElement = (BaseElement) Globals.Factory.GetObject("myBaseElement");

  <object name="myBaseElement"
           type="PW3Info.baseelement.data.BaseElement, PW3Info">
    <property name="ElementName" value="StoreID" />
    <property name="Description" value="The Store Identifier" />
  </object>

  <object id="debugInterceptor" type="PW3Info.aop.DebugInterceptor, PW3Info">
  </object>

  <object id="ProxyCreator" type="Spring.Aop.Framework.AutoProxy.ObjectNameAutoProxyCreator, Spring.Aop">
    <property name="ObjectNames">
      <list>
        <value>myBaseElement</value>
      </list>
    </property>
    <property name="InterceptorNames">
      <list>
        <value>debugInterceptor</value>
      </list>
    </property>
  </object>

[Bruno Baia]

Hi,

With default configuration, CompositionAopProxy is used and require that your target implements an interface to be implemented by the proxy, so you can't cast it to a class.

BaseElement myBaseElement = (BaseElement) Globals.Factory.GetObject("myBaseElement");

There is another option setting ProxyTargetType="true", you will be able to proxy the target type but only methods marked as virtual will be proxied.

<object id="ProxyCreator" type="Spring.Aop.Framework.AutoProxy.ObjectNameAutoProxyCreator, Spring.Aop">
   <property name="ProxyTargetType" value="true"/>
   <property name="ObjectNames">
      <list>
        <value>myBaseElement</value>
      </list>
   </property>
   <property name="InterceptorNames">
      <list>
        <value>debugInterceptor</value>
      </list>
   </property>
</object>

Reference documentation :
12.5.3. Proxying Interfaces
12.5.4. Proxying Classes


HTH,
Bruno

[jjarrel]

Great. Thanks for the clarification. I think I get it at this point.

jeff