use backend to populate data

src/main/java/com/commafeed/frontend/rest/JSONPage.java

@@ -0,0 +1,25 @@
+package com.commafeed.frontend.rest;
+
+import org.apache.wicket.markup.html.WebPage;
+import org.apache.wicket.request.handler.TextRequestHandler;
+import org.apache.wicket.request.mapper.parameter.PageParameters;
+
+import com.commafeed.frontend.CommaFeedSession;
+import com.commafeed.model.User;
+import com.google.gson.Gson;
+
+@SuppressWarnings("serial")
+public abstract class JSONPage extends WebPage {
+
+	public JSONPage(PageParameters pageParameters) {
+		getRequestCycle().scheduleRequestHandlerAfterCurrent(
+				new TextRequestHandler("application/json", "UTF-8", new Gson()
+						.toJson(getObject(pageParameters))));
+	}
+
+	protected abstract Object getObject(PageParameters parameters);
+
+	protected User getUser() {
+		return CommaFeedSession.get().getUser();
+	}
+}