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Ajax4jsf is an open source extension to the JavaServer Faces standard that adds AJAX capability to JSF applications without requiring the writing of any JavaScript.

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/**
 * Licensed under the Common Development and Distribution License,
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.sun.com/cddl/
 *   
 * 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.ajax4jsf.framework.renderer.compiler;

import java.io.IOException;

import javax.faces.FacesException;
import javax.faces.component.UIComponent;

import org.ajax4jsf.framework.util.message.Messages;

/**
 * @author [email protected] (latest modification by $Author: slava_kabanovich $)
 * @version $Revision: 1.2 $ $Date: 2006/07/12 09:45:58 $
 *
 */
public class ChildElement extends ElementBase {

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.ElementBase#encode(org.ajax4jsf.framework.renderer.compiler.TemplateContext, java.lang.String)
	 */
	public void encode(TemplateContext context, String breakPoint) throws IOException {
		throw new FacesException(Messages.getMessage(Messages.BREAKPOINTS_UNSUPPORTED_ERROR_3));
	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.ElementBase#encode(org.ajax4jsf.framework.renderer.compiler.TemplateContext)
	 */
	public void encode(TemplateContext context) throws IOException {
		UIComponent child = (UIComponent) context.getParameter(ChildrensElement.CURRENT_CHILD);
		if(null == child){
			child = (UIComponent) getValue(context);
		}
		if(null !=child && child.isRendered()){
			context.getRenderer().renderChild(context.getFacesContext(),child);
		}
	}

	public String getTag() {
		return HtmlCompiler.NS_UTIL_PREFIX+HtmlCompiler.CHILD_TAG;
	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.ElementBase#getAllowedClasses()
	 */
	protected Class[] getAllowedClasses() {
		// child elements not allowed
		return new Class[]{};
	}

}