/*

  * 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 org.seasar.teeda.core.config.faces.assembler.impl;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import javax.faces.internal.FactoryFinderUtil;

 import javax.faces.render.RenderKit;

 import javax.faces.render.RenderKitFactory;

 import javax.faces.render.Renderer;

 import org.seasar.framework.beans.BeanDesc;

 import org.seasar.framework.beans.factory.BeanDescFactory;

 import org.seasar.framework.container.S2Container;

 import org.seasar.framework.container.factory.SingletonS2ContainerFactory;

 import org.seasar.framework.log.Logger;

 import org.seasar.framework.util.ClassUtil;

 import org.seasar.teeda.core.JsfConstants;

 import org.seasar.teeda.core.config.faces.assembler.RenderKitAssembler;

 import org.seasar.teeda.core.config.faces.element.RenderKitElement;

 import org.seasar.teeda.core.config.faces.element.RendererElement;

 import org.seasar.teeda.core.util.DIContainerUtil;

 import org.seasar.teeda.core.util.IteratorUtil;

 /**

  * @author shot

  */

 public class DefaultRenderKitAssembler extends RenderKitAssembler {

     private static Logger logger_ = Logger

             .getLogger(DefaultRenderKitAssembler.class);

     private List renderLists_;

     public DefaultRenderKitAssembler(Map renderKits) {

         super(renderKits);

     }

     protected void setupBeforeAssemble() {

         renderLists_ = new ArrayList();

         for (Iterator itr = IteratorUtil.getEntryIterator(getRenderKits()); itr

                 .hasNext();) {

             Map.Entry entry = (Map.Entry) itr.next();

             RenderKitElement renderKitElement = (RenderKitElement) entry

                     .getValue();

             String renderKitId = getRenderKitId(renderKitElement);

             String className = getRenderKitClassName(renderKitElement);

             List renderers = renderKitElement.getRendererElements();

             isAllSuitableJsfElement(renderers, RendererElement.class);

             RenderKitBean bean = new RenderKitBean(renderKitId, className,

                     renderers);

             renderLists_.add(bean);

         }

     }

     private String getRenderKitId(RenderKitElement renderKitElement) {

         String renderKitId = renderKitElement.getRenderKitId();

         if (renderKitId != null) {

             return renderKitId;

         }

         return RenderKitFactory.HTML_BASIC_RENDER_KIT;

     }

     public void assemble() {

         RenderKitFactory renderKitFactory = FactoryFinderUtil

                 .getRenderKitFactory();

         for (Iterator itr = IteratorUtil.getIterator(renderLists_); itr

                 .hasNext();) {

             RenderKitBean bean = (RenderKitBean) itr.next();

             String renderKitId = bean.getRenderKitId();

             RenderKit renderKit = createRenderKit(bean.getClassName());

             RendererElement rendererElement = null;

             while ((rendererElement = bean.getRendererElement()) != null) {

                 String rendererClass = rendererElement.getRendererClass();

                 Renderer renderer = createRenderer(rendererClass);

                 renderKit.addRenderer(rendererElement.getComponentFamily(),

                         rendererElement.getRendererType(), renderer);

             }

             renderKitFactory.addRenderKit(renderKitId, renderKit);

         }

     }

     protected String getRenderKitClassName(RenderKitElement renderKitElement) {

         String className = renderKitElement.getRenderKitClass();

         if (className == null) {

             className = JsfConstants.DEFAULT_RENDERKIT_CLASS;

         }

         return className;

     }

     protected RenderKit createRenderKit(String className) {

         Class clazz = ClassUtil.forName(className);

         RenderKit renderKit = (RenderKit) DIContainerUtil

                 .getComponentNoException(clazz);

         if (renderKit == null) {

             renderKit = (RenderKit) newInstance(className);

             S2Container container = SingletonS2ContainerFactory.getContainer();

             BeanDesc beanDesc = BeanDescFactory.getBeanDesc(clazz);

             if (beanDesc.hasPropertyDesc("container")) {

                 beanDesc.getPropertyDesc("container").setValue(renderKit,

                         container);

             }

         }

         return renderKit;

     }

     protected Renderer createRenderer(String className) {

         Renderer renderer = null;

         try {

             renderer = (Renderer) newInstance(className);

         } catch (Exception e) {

             logger_.warn("Exception " + e

                     + "occured when trying to create Renderer.");

         }

         return renderer;

     }

     List getRenderList() {

         return renderLists_;

     }

     static class RenderKitBean {

         private String renderKitId_;

         private String className_;

         private Iterator renderers_;

         public RenderKitBean(String renderKitId, String className,

                 List rendererElements) {

             renderKitId_ = renderKitId;

             className_ = className;

             renderers_ = rendererElements.iterator();

         }

         public String getClassName() {

             return className_;

         }

         public String getRenderKitId() {

             return renderKitId_;

         }

         public boolean hasNext() {

             return renderers_.hasNext();

         }

         public RendererElement getRendererElement() {

             RendererElement element = null;

             if (hasNext()) {

                 element = (RendererElement) renderers_.next();

             }

             return element;

         }

     }

 }