从参考bean的映射中获取键值

Question

Im trying to get map key value but from reference bean.

I have two classes. One contains two Maps other one need to read key value from this class an set own field.

@Data
public class ClassOne{

    private Map<String, Object> xxx;
    private Map<String, Object> yyy;

}

@Data
public class ClassTwo{
    private String zzz;
}

xml application context

<bean id="ClassTwo" class="...">
<property name="zzz" value="#{ClassOne.${xxx['key']} == 'myString' ? 'otherString' : false}"></property>
</bean>

<bean id="ClassOne" class="...">
<property name="xxx" value=""></property>
</bean>

my intention is to refer to bean ClassOne get a Map and get Map value by key

{ClassOne.${xxx['key']} == 'myString' ? 'otherString' : false}

edit:

for this application context Im getting

   <bean id="ClassTwo" class="com.interns.pittaci.model.label.ClassTwo">
        <!--- for property name zzz from ClassTwo set value based on map called xxx with key 'test' inside ClassOne -->
        <property name="zzz" value="#{ClassOne.${xxx['test']} == 'test' ? 'test1 ' : test2}"></property>
    </bean>

following error message:

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'ClassTwo' defined in class path resource [applicationContext.xml]: Could not resolve placeholder 'xxx['test']' in value "#{ClassOne.${xxx['test']} == 'test' ? 'test1 ' : test2}"; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'xxx['test']' in value "#{ClassOne.${xxx['test']} == 'test' ? 'test1 ' : test2}"

Answer 1

I think the problem is using ${} when accessing to the map because it is not necessary to use ${} when accesing a class atribute. Try #{ClassOne.xxx['key'] == 'myString' ? 'otherString' : false} #{ClassOne.xxx['key'] == 'myString' ? 'otherString' : false}

In addition to this, the ternary operator defined in application-context.xml is returning a boolean value in case that the key is not present in the map and trying to assign it to a String attribute