/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * Licensed 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 javax.faces.render;

 import java.io.IOException;

 import java.util.Iterator;

 import javax.faces.component.UIComponent;

 import javax.faces.context.FacesContext;

 import javax.faces.convert.ConverterException;

 import org.seasar.framework.util.AssertionUtil;

 /**

  * @author shot

  * @author manhole

  */

 public abstract class Renderer {

     public void decode(FacesContext context, UIComponent component) {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("component", component);

     }

     public void encodeBegin(FacesContext context, UIComponent component)

             throws IOException {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("component", component);

     }

     public void encodeChildren(FacesContext context, UIComponent component)

             throws IOException {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("component", component);

         encodeChildren0(context, component);

     }

     private void encodeChildren0(FacesContext context, UIComponent component)

             throws IOException {

         for (Iterator itr = component.getChildren().iterator(); itr.hasNext();) {

             UIComponent child = (UIComponent) itr.next();

             child.encodeBegin(context);

             if (child.getRendersChildren()) {

                 child.encodeChildren(context);

             } else {

                 encodeChildren0(context, child);

             }

             child.encodeEnd(context);

             if (context.getResponseComplete()) {

                 break;

             }

         }

     }

     public void encodeEnd(FacesContext context, UIComponent component)

             throws IOException {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("component", component);

     }

     public String convertClientId(FacesContext context, String clientId) {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("clientId", clientId);

         return clientId;

     }

     public boolean getRendersChildren() {

         return false;

     }

     public Object getConvertedValue(FacesContext context,

             UIComponent component, Object submittedValue)

             throws ConverterException {

         AssertionUtil.assertNotNull("context", context);

         AssertionUtil.assertNotNull("component", component);

         return submittedValue;

     }

 }