org.sakaiproject.jsf.renderer.InstructionMessageRenderer Maven / Gradle / Ivy

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This is the Maven project for the custom JSF widgets. The widgets and the resources projects are closely tied together. These widgets will be deployed as a jar file containing Sakai JSF widgets (components). Web applications can include this jar in order to use the Sakai JSF widgets in a JSF tool.

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/**********************************************************************************
* $URL$
* $Id$
***********************************************************************************
*
 * Copyright (c) 2003, 2004, 2005, 2006, 2008 The Sakai Foundation
 *
 * Licensed under the Educational Community License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.opensource.org/licenses/ECL-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
*
**********************************************************************************/


package org.sakaiproject.jsf.renderer;

import java.io.IOException;

import javax.faces.component.UIComponent;
import javax.faces.component.UIOutput;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.render.Renderer;

import org.sakaiproject.jsf.util.RendererUtil;


public class InstructionMessageRenderer extends Renderer
{
	public boolean supportsComponentType(UIComponent component)
	{
		return (component instanceof UIOutput);
	}

	public void encodeBegin(FacesContext context, UIComponent component) throws IOException
	{
		ResponseWriter writer = context.getResponseWriter();
		writer.write("");
	}

	/**
	 * @param context FacesContext for the request we are processing
	 * @param component UIComponent to be rendered
	 * @exception IOException if an input/output error occurs while rendering
	 * @exception NullPointerException if context or component is null
	 */
	public void encodeEnd(FacesContext context, UIComponent component) throws IOException
	{
		ResponseWriter writer = context.getResponseWriter();

		String txt = (String) RendererUtil.getAttribute(context, component, "value");
		if (txt != null)
		{
			writer.write(txt);
		}

		writer.write("");
	}
}