Is it possible from Spring to inject the result of calling a method on a ref bean?

It’s possible in Spring 3.0 via Spring Expression Language:

<bean id="registryService" class="foo.MyRegistry">
...properties set etc...
</bean>

<bean id="MyClient" class="foo.MyClient">
  <property name="endPoint" value="#{registryService.getEndPoint('bar')}"/>
</bean>