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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 org.ajax4jsf.framework.util.message.Messages;
import org.xml.sax.SAXException;

/**
 * @author [email protected] (latest modification by $Author: alexsmirnov $)
 * @version $Revision: 1.3 $ $Date: 2006/09/12 15:53:35 $
 *
 */
public class AttributeElement extends ElementBase {

	private String name;
	private boolean mandatory = true;
	
	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.RootElement#encode(javax.faces.render.Renderer, javax.faces.context.FacesContext, javax.faces.component.UIComponent)
	 */
	public void encode(TemplateContext context) throws IOException {
		String attributeValue = getString(context);
		if(attributeValue.length()>0 || isMandatory()){
			context.getWriter().writeAttribute(getName(),attributeValue,null);
		}
	}
	
	
	/* (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_INSIDE_ATTRIBUTE_ERROR, getName(), context.getComponent().getId()));
	}


	/**
	 * @return Returns the name.
	 */
	public String getName() {
		return name;
	}
	/**
	 * @param name The name to set.
	 */
	public void setName(String name) {
		this.name = name;
	}
	/**
	 * @return Returns the notNull.
	 */
	public boolean isMandatory() {
		return mandatory;
	}
	/**
	 * Alias ( due to typo error ) for Mandatory property.
	 * @param notNull The notNull to set.
	 */
	public void setMantadory(boolean notNull) {
		this.mandatory = notNull;
	}

	/**
	 * @param notNull The notNull to set.
	 */
	public void setMandatory(boolean notNull) {
		this.mandatory = notNull;
	}

	public String getTag() {
		return HtmlCompiler.NS_PREFIX+HtmlCompiler.ATTRIBUTE_TAG;
	}


	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.ElementBase#setParent(org.ajax4jsf.framework.renderer.compiler.PreparedTemplate)
	 */
	public void setParent(PreparedTemplate parent) throws SAXException {		
		super.setParent(parent);
		if (getName()==null) {
			throw new SAXException(Messages.getMessage(Messages.NO_NAME_ATTRIBUTE_ERROR, getTag()));
		}
	}


	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.ElementBase#getAllowedClasses()
	 */
	protected Class[] getAllowedClasses() {
		// TODO Auto-generated method stub
		return new Class[]{
				MethodCallElement.class,
				TextElement.class,
				ResourceElement.class,
				ClassElement.class				
		};
	}
	
}