JsonAjaxBehavior.java

package be.selckin.swu.jquery;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AbstractDefaultAjaxBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.JavaScriptHeaderItem;
import org.apache.wicket.request.Request;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.request.resource.ResourceReference;

public abstract class JsonAjaxBehavior extends AbstractDefaultAjaxBehavior {

    private static final ResourceReference JAVASCRIPT = new JQueryDependantJavaScriptReference(JsonAjaxBehavior.class, "JsonAjaxBehavior.js");

    @Override
    protected final void respond(AjaxRequestTarget target) {
        Request request = RequestCycle.get().getRequest();
        String func = request.getRequestParameters().getParameterValue("callback").toString();

        Javascripter.callFunction(target.getHeaderResponse(), func, respond(request, target));
    }

    @Override
    public void renderHead(Component component, IHeaderResponse response) {
        response.render(JavaScriptHeaderItem.forReference(JAVASCRIPT));
        super.renderHead(component, response);

    }

    protected abstract Object respond(Request request, AjaxRequestTarget target);
}