<bean id=ChildBean1>
<bean id=ChildBean2>
<parentBean name='parentBean' lazy-init="true">
   <property name='flag'>

   <somecondition flag=1/>
   <property name='child' ref ='childBean1'/>
   <somecondition flag=2/>
   <property name='child' ref ='childBean2'/>
</parentBean>