How to autowire factorybean

Question

I have a ServiceListFactoryBean which creates a list of service implementations:

<bean id="services"
      class="org.springframework.beans...ServiceListFactoryBean"
      p:serviceType="ServiceInterface"/>

I can access the services using the applicationContext without a problem:

    final List services = ctx.getBean("services", List.class));

I can also use trad constructor-arg injection successfully:

<bean id="aClass" class="AClass">
    <constructor-arg ref="services"/>
</bean>

But if I try to autowire the dependency

@Autowired @Qualifier("services") private List services;

Then I get a BeanCreationException caused by

FatalBeanException: No element type declared for collection [java.util.List]

I am using Spring 3.0.

Answer 1

It turns out that the answer is ...

@Resource(name="services") private List services;

Answer 2

The exception message is from DefaultListableBeanFactory, and it's complining that it can't autowire your field because the List has no generic type (see DefaultListableBeanFactory line 716).

Try adding a generic signature to your field, e.h.

@Autowired @Qualifier("services") private List<Service> services;