How to use String constants in camel's blueprint.xml ?

Issue

• In java code, user is using literals like

@Produce(uri = "activemq:queue:uk.gov.camden.planning.alerts.sendNotifications")
    protected ProducerTemplate inputEndpoint;

• And in blueprint.xml files, user then use

<route id="listSubscribedAlerts">
<from uri="activemq:queue:xxx.yyy..sendNotifications" />

• Is there any way to use something like below inside of a blueprint.xml file?

public interface iRouteContants {
    public static final String SEND_QUEUE = "activemq:queue:uk.gov.camden.planning.alerts.sendNotifications"
}