Where is DS Annotation?

I used Declarative Service in my application, JAM Circle.
Declarative Service is cool stuff.
It makes to solve bundles startup order.
But I confused a thing.
How do I inject the service at startup time?
I think services needs to initialize at startup.
So I choosed the way to solve by singleton class like below.

scr.xml
<?xml version="1.0" encoding="UTF-8"?>
<scr:component xmlns:scr="http://www.osgi.org/xmlns/scr/v1.1.0" name="org.kompiro.jamcircle.kanban.ui.KanbanUIContext">
<implementation class="org.kompiro.jamcircle.kanban.ui.KanbanUIContext"/>
<reference bind="setKanbanService" cardinality="1..1" interface="org.kompiro.jamcircle.kanban.service.KanbanService" name="KanbanService" policy="static"/>
<reference bind="setScriptingService" cardinality="1..1" interface="org.kompiro.jamcircle.scripting.ScriptingService" name="ScriptingService" policy="static"/>
</scr:component>

and implementation of Context class(The name inspired from "ApplicationContext")

package org.kompiro.jamcircle.kanban.ui;

import org.kompiro.jamcircle.kanban.service.KanbanService;
import org.kompiro.jamcircle.scripting.ScriptingService;

public class KanbanUIContext {

private static KanbanUIContext context;
private KanbanService kanbanService;
private ScriptingService scriptingService;

public KanbanUIContext() {
KanbanUIContext.context = this;
}

public static KanbanUIContext getDefault(){
return context;
}

public KanbanService getKanbanService() {
return kanbanService;
}

public void setKanbanService(KanbanService kanbanService) {
this.kanbanService = kanbanService;
}

public ScriptingService getScriptingService() {
return scriptingService;
}

public void setScriptingService(ScriptingService scriptService) {
this.scriptingService = scriptService;
}

}

It's not good way(T_T)... KanbanUIContext is a singleton class and be used to call ServiceLocator Pattern. It is not easy to test by code...
I haven't know there is no way to inject to use annotation for field injection.
Is there any way to use annotation and field injection?