I have a standalone enum type defined, something like this:
package my.pkg.types;
public enum MyEnumType {
TYPE1,
TYPE2
}
Now, I want to inject a value of that type into a bean property:
<bean name="someName" class="my.pkg.classes">
<property name="type" value="my.pkg.types.MyEnumType.TYPE1" />
</bean>
...and that didn't work :(
How should I Inject an Enum into a spring bean?
You can just do "TYPE1".
I know this is a really old question, but in case someone is looking for the newer way to do this, use the spring util namespace:
<util:constant static-field="my.pkg.types.MyEnumType.TYPE1" />
As described in the spring documentation.
This is what did it for me MessageDeliveryMode is the enum the bean will have the value PERSISTENT:
<bean class="org.springframework.amqp.core.MessageDeliveryMode" factory-method="valueOf">
<constructor-arg value="PERSISTENT" />
</bean>
To be specific, set the value to be the name of a constant of the enum type, e.g., "TYPE1" or "TYPE2" in your case, as shown below. And it will work:
<bean name="someName" class="my.pkg.classes">
<property name="type" value="TYPE1" />
</bean>
You can write Bean Editors (details are in the Spring Docs) if you want to add further value and write to custom types.
Using SPEL and P-NAMESPACE:
<beans...
xmlns:p="http://www.springframework.org/schema/p" ...>
..
<bean name="someName" class="my.pkg.classes"
p:type="#{T(my.pkg.types.MyEnumType).TYPE1}"/>
Spring-integration example, routing based on a an Enum field:
public class BookOrder {
public enum OrderType { DELIVERY, PICKUP } //enum
public BookOrder(..., OrderType orderType) //orderType
...
config:
<router expression="payload.orderType" input-channel="processOrder">
<mapping value="DELIVERY" channel="delivery"/>
<mapping value="PICKUP" channel="pickup"/>
</router>
Use the value child element instead of the value attribute and specify the Enum class name:
<property name="residence">
<value type="SocialSecurity$Residence">ALIEN</value>
</property>
The advantage of this approach over just writing value="ALIEN"
is that it also works if Spring can't infer the actual type of the enum from the property (e.g. the property's declared type is an interface).Adapted from araqnid's comment.
Source: Stackoverflow.com