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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.tag;

import java.util.Set;

import org.ajax4jsf.framework.ajax.AjaxComponent;
import org.ajax4jsf.framework.renderer.AjaxRendererUtils;

import com.sun.facelets.FaceletContext;
import com.sun.facelets.tag.MetaRule;
import com.sun.facelets.tag.Metadata;
import com.sun.facelets.tag.MetadataTarget;
import com.sun.facelets.tag.TagAttribute;

/**
 * @author shura (latest modification by $Author: alexsmirnov $)
 * @version $Revision: 1.3 $ $Date: 2006/07/19 13:59:22 $
 *
 */
public class AjaxReRendrRule extends MetaRule {

	public static final AjaxReRendrRule instance = new AjaxReRendrRule();
	/**
	 * 
	 */
	public AjaxReRendrRule() {
		super();
		// TODO Auto-generated constructor stub
	}

	/* (non-Javadoc)
	 * @see com.sun.facelets.tag.MetaRule#applyRule(java.lang.String, com.sun.facelets.tag.TagAttribute, com.sun.facelets.tag.MetadataTarget)
	 */
	public Metadata applyRule(String name, TagAttribute attribute,
			MetadataTarget meta) {
        if (meta.isTargetInstanceOf(AjaxComponent.class)) {
        	if ("reRender".equals(name)) {
				if (attribute.isLiteral()) {
					return new ReRendersSetMataData(attribute.getValue());
				} else {
					// Process as usual expression
					return null;
				}
			}
        }
		return null;
	}

	static class ReRendersSetMataData extends Metadata{

		private Set _reRender;
		/**
		 * @param value
		 */
		public ReRendersSetMataData(String value) {
			_reRender = AjaxRendererUtils.asSet(value);
		}

		/* (non-Javadoc)
		 * @see com.sun.facelets.tag.Metadata#applyMetadata(com.sun.facelets.FaceletContext, java.lang.Object)
		 */
		public void applyMetadata(FaceletContext ctx, Object instance) {
			((AjaxComponent) instance).setReRender(_reRender);
			
		}
		
	}
}