Java Question How to wrap a class that extends another class in java

public class MyPushListener extends PusheListenerService {
      @Override
     public void onMessageReceived(JSONObject message) {
          // Your code
     }
}

@activityobject
public class pushwrapp{
    public void initialize(BA ba){
        //Push is a class name that registers app to receive a notification from special web server
        Push.initialize(ba.activity,true);
   }

public class PushWrap extends PushListenerService
{
     private BA ba = null;
     private String eventName;     

     public void Initialize(BA ba, String eventName)
     {
          this.ba = ba;
          this.eventName = eventName;
          Push.initialize(ba.activity, true);
     }

     @Override
     @BA.Hide
     public void onMessageReceived(JSONObject message) 
     {
       // Your code
       String messageString;   //convert message to messageString, somehow
       ba.raiseEvent2(null, true, eventName.toLowerCase() + "_messagereceived", false, messageString);  //This raises an event
     }
}

Push.initialize(this,true)

@Override
@BA.Hide
public void onMessageReceived(JSONObject message) 
{
     // Your code
     String messageString = message.toString();
     ba.raiseEvent2(null, true, eventName.toLowerCase() + "_messagereceived", false, messageString); //This raises an event
}