package org.example.handlers;

import com.sun.jsftemplating.annotation.Handler;
import com.sun.jsftemplating.annotation.HandlerInput;
import com.sun.jsftemplating.annotation.HandlerOutput;
import com.sun.jsftemplating.component.ComponentUtil;
import com.sun.jsftemplating.layout.descriptors.handler.HandlerContext;
import com.sun.jsftemplating.layout.event.CreateChildEvent;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;


/**
 *  <p>	This class is written to demonstrate how to write a
 *	<code>Handler</code>.</p>
 */
public class DynamicColumnHandlers {

    /**
     *	<p> This handler creates a hyprlink using the event object
     *	    information.</p>
     *
     *	@param  context	The <code>HandlerContext</code>.
     */
    @Handler(id="Test.createHyperLink")
    public static UIComponent calculateResponse(HandlerContext context) {
	if (!context.getEventType().equals(CreateChildEvent.EVENT_TYPE)) {
	    throw new IllegalArgumentException(
		    "This event only works for createChild events!");
	}

	CreateChildEvent event = (CreateChildEvent) context.getEventObject();
	FacesContext ctx = context.getFacesContext();
	UIComponent comp = ctx.getApplication().
		createComponent("com.sun.webui.jsf.Hyperlink");
	String url = "http://www.google.com/search?q=" + event.getData();
	if (ComponentUtil.isValueReference(url)) {
	    comp.setValueExpression("url",
		ctx.getApplication().getExpressionFactory().
		    createValueExpression(
			ctx.getELContext(), url, String.class));
	} else {
	    comp.getAttributes().put("url", url);
	}
	comp.getAttributes().put("value", "Click Me!");
	return comp;
    }
}