I'm reading section

http://www.springframework.org/docs/...p.html#d0e3285

that gives an example on how to configure ProxyFactoryBean

Code:
<bean id="person" 
    class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="proxyInterfaces"><value>com.mycompany.Person</value></property>

    <property name="target"><ref local="personTarget"/></property>
    <property name="interceptorNames">
        <list>
            <value>myAdvisor</value>
            <value>debugInterceptor</value>
        </list>
    </property>
</bean>
My question is what if class PersonImpl of the above example implements more than one interface?

I`m asking because of the following situation:

Let's assume a "PersonImpl" extends AbstractPerson
and AbstractPerson implements 2 interfaces, let's say interfaceA and interfaceB.

Now I have to decide which interface is the "right" interface for the property "proxyInterfaces" A or B? But If I stayed with A I loose the business functionality of B and vice versa.

Is this a real problem or am I just doing things the wrong way?

Maybe I have to pass all implemented interfaces in a list?

Code:
<property name="proxyInterfaces">
        <list>
            <value>interfaceA</value>
            <value>interfaceB</value>
        </list>
</property>
Thank you!
Mo