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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 java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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

import org.ajax4jsf.framework.renderer.RendererBase;
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: 2006/09/04 10:47:48 $
 *
 */
public class BreakPoint implements PreparedTemplate {
	
	private List childrens = new ArrayList();

	private PreparedTemplate _parent;
	private String name;

	/**
	 * @return Returns the name.
	 */
	public String getName() {
		return name;
	}

	/**
	 * @param name The name to set.
	 */
	public void setName(String name) {
		this.name = name;
	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.PreparedTemplate#encode(org.ajax4jsf.framework.renderer.RendererBase, javax.faces.context.FacesContext, javax.faces.component.UIComponent)
	 */
	public void encode(RendererBase renderer, FacesContext context,
			UIComponent component) throws IOException {
		throw new BreakException(getName());

	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.PreparedTemplate#encode(org.ajax4jsf.framework.renderer.compiler.TemplateContext)
	 */
	public void encode(TemplateContext context) throws IOException {
		throw new BreakException(getName());

	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.PreparedTemplate#encode(org.ajax4jsf.framework.renderer.compiler.TemplateContext, java.lang.String)
	 */
	public void encode(TemplateContext context, String breakPoint)
			throws IOException {
		if (!getName().equals(breakPoint)) {
			throw new BreakException(getName());
		} else if(getChildren().size()>0){
			// encode all childrens of this breakpoint.
			for (Iterator iter = getChildren().iterator(); iter.hasNext();) {
				PreparedTemplate element = (PreparedTemplate) iter.next();
				element.encode(context);
			}
			// after childrens, break encoding.
			throw new BreakException(getName());
		}
		// if no childrens - continue encoding.
	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.PreparedTemplate#getChildren()
	 */
	public List getChildren() {
		// breakpoint - empty element
		return childrens;
	}

	/* (non-Javadoc)
	 * @see org.ajax4jsf.framework.renderer.compiler.PreparedTemplate#addChild(org.ajax4jsf.framework.renderer.compiler.PreparedTemplate)
	 */
	public void addChild(PreparedTemplate child) throws SAXException {
		child.setParent(this);
		childrens.add(child);
	}

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

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

	public Object getValue(TemplateContext context) {
		// TODO Auto-generated method stub
		return null;
	}


}