Spring - How do you set Enum keys in a Map with annotations

This worked for me...

My Spring application context:

<util:map id="myMap">
  <entry key="#{T(com.acme.MyEnum).ELEM1}" value="value1" />
  <entry key="#{T(com.acme.MyEnum).ELEM2}" value="value2" />
</util:map>

My class where the Map gets injected:

public class MyClass {

    private @Resource Map<MyEnum, String> myMap;
}

The important things to note are that in the Spring context I used SpEL (Spring Expression Language) which is only available since version 3.0. And in my class I used @Resource, neither @Inject (it didn't work for me) nor @Autowired (I didn't try this). The only difference I'm aware of between @Resource and @Autowired, is that the former auto-inject by bean name while the later does it by bean type.

Enjoy!

This one gave me fits but I was able to piece it together using David's answer and some other links (below).

• do not change the names of the properties in the MapFactoryBean declaration.
• ensure that key-type attribute points to the enum that you want to use as a key in the map.

Class

@Component
public class MyClass {

    private Map<MyEnum, ValueObjectInterface> valueMap;

    @Autowired
    public void setValueMap(final Map<MyEnum, ValueObjectInterface> valueMap) {
        this.valueMap= valueMap;
    }


}

Enum

    public enum MyEnum{
    FOO ("FOO"),
    BAR ("BAR"),
    BAZ ("BAZ");
}

XML Config file:

<bean id="valueMap" class="org.springframework.beans.factory.config.MapFactoryBean">
    <property name="targetMapClass">
        <value>java.util.HashMap</value>
    </property>
    <property name="sourceMap">
        <map key-type="com.company.packagepath.MyEnum">
          <entry key="FOO" value-ref="valueObject1" />
          <entry key="BAR" value-ref="valueObject2" />
          <entry key="BAZ" value-ref="valueObject3" />
        </map>
    </property>
</bean>

<bean id="valueObject1"  class="com.company.packagepath.ValueObject1" />
<bean id="valueObject2"  class="com.company.packagepath.ValueObject2" />
<bean id="valueObject3"  class="com.company.packagepath.ValueObject3" />

LINKS

• Code Ranch
• Spring MapFactoryBean example at mkyong.com
• How assign bean's property an Enum value in Spring config file?