2009/05/20 - Apache Shale has been retired.

 /*

  * Licensed to the Apache Software Foundation (ASF) under one or more

  * contributor license agreements.  See the NOTICE file distributed with

  * this work for additional information regarding copyright ownership.

  * The ASF licenses this file to you under the Apache 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.apache.org/licenses/LICENSE-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.apache.shale.renderer;

 import java.io.IOException;

 import java.util.Map;

 import javax.faces.component.UIComponent;

 import javax.faces.context.FacesContext;

 import javax.faces.context.ResponseWriter;

 import javax.faces.render.Renderer;

 import org.apache.shale.component.Token;

 /**

  * <p>Renderer for a {@link Token} component, dealing with a transaction

  * token used to catch duplicate form submits.</p>

  *

  * $Id: TokenRenderer.java 464373 2006-10-16 04:21:54Z rahul $

  */

 public class TokenRenderer extends Renderer {

     // -------------------------------------------------------- Renderer Methods

     /**

      * <p>Save the submitted value if this component was actually rendered.</p>

      *

      * @param context <code>FacesContext</code> for the current request

      * @param component <code>UIComponent</code> to be decoded

      */

     public void decode(FacesContext context, UIComponent component) {

         if ((context == null) || (component == null)) {

             throw new NullPointerException();

         }

         Token token = (Token) component;

         if (token.isRendered()) {

             String clientId = token.getClientId(context);

             Map map = context.getExternalContext().getRequestParameterMap();

             token.setSubmittedValue(map.get(clientId));

         }

     }

     /**

      * <p>Render the start of a hidden input element containing the transaction

      * token value for this component.</p>

      *

      * @param context <code>FacesContext</code> for the current request

      * @param component <code>UIComponent</code> to be decoded

      *

      * @exception IOException if an input/output error occurs

      */

     public void encodeBegin(FacesContext context, UIComponent component)

       throws IOException {

         if ((context == null) || (component == null)) {

             throw new NullPointerException();

         }

         Token token = (Token) component;

         if (token.isRendered()) {

             ResponseWriter writer = context.getResponseWriter();

             writer.startElement("input", token);

             String clientId = token.getClientId(context);

             writer.writeAttribute("id", clientId, "id");

             writer.writeAttribute("name", clientId, "id");

             writer.writeAttribute("type", "hidden", null);

             writer.writeAttribute("value", token.getToken(), null);

         }

     }

     /**

      * <p>Render the end of a hidden input element containing the transaction

      * token value for this component.</p>

      *

      * @param context <code>FacesContext</code> for the current request

      * @param component <code>UIComponent</code> to be decoded

      *

      * @exception IOException if an input/output error occurs

      */

     public void encodeEnd(FacesContext context, UIComponent component)

       throws IOException {

         if ((context == null) || (component == null)) {

             throw new NullPointerException();

         }

         Token token = (Token) component;

         if (token.isRendered()) {

             ResponseWriter writer = context.getResponseWriter();

             writer.endElement("input");

         }

     }

 }