[FIXED] Is Map<String, Collection<Object>> possible to declare in Spring

Issue

I have a class with the following constructor:

public MyClass(Map<String s, Collection<Object>> co){
    //impl
}

I need to invoke it via Spring bean's declarations. I tried to do something like this:

<bean id="toInject" class="path.toSomClass" />

<bean id="myBean" class="path.to.MyClass">
    <constructor-arg>
        <map>
            <entry key="String" 
        value-ref="_WHAT_SHOULD_I_WRITE_HERE_TO_DECLARE_A_COLLECTION_FROM_THE_ONLY_toInject">
        </map>
    </constructor-arg>
</bean>

I'm not concerned about the type of the Collection (It may be a List<T> as well as Set<T>, or anything else implementing Collection<T>).

Solution

You can declare a <list> element as part of the value for the entry, like this:

<bean id="myBean" class="path.to.MyClass">
    <constructor-arg>
        <map>
            <entry key="String">
                <list>
                    <ref bean="toInject" />
                </list>
            </entry>
        </map>
    </constructor-arg>
</bean>

Answered By - Tunaki
Answer Checked By - Marie Seifert (JavaFixing Admin)