/*
    * 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.myfaces.custom.tree.renderkit.html;
  
  import java.io.IOException;
  import java.util.Set;
  
  import javax.faces.FacesException;
  import javax.faces.component.UIComponent;
  import javax.faces.component.UISelectMany;
  import javax.faces.context.FacesContext;
  import javax.faces.convert.Converter;
  
  import org.apache.myfaces.custom.tree.HtmlTreeCheckbox;
  import org.apache.myfaces.shared_tomahawk.renderkit.RendererUtils;
  import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlCheckboxRendererBase;
  
  /**
   * @JSFRenderer
   *   renderKitId = "HTML_BASIC" 
   *   family = "org.apache.myfaces.HtmlTreeCheckbox"
   *   type = "org.apache.myfaces.HtmlTreeCheckbox"
   *   
   * @author <a href="mailto:dlestrat@apache.org">David Le Strat </a>
   */
  public class HtmlTreeCheckboxRenderer extends HtmlCheckboxRendererBase
  {
  
      /**
       * @see javax.faces.render.Renderer#encodeEnd(javax.faces.context.FacesContext,
       *      javax.faces.component.UIComponent)
       */
      public void encodeEnd(FacesContext context, UIComponent component) throws IOException
      {
          HtmlTreeCheckbox checkbox = (HtmlTreeCheckbox) component;
  
          String forAttr = checkbox.getFor();
          if (forAttr == null)
          {
              throw new IllegalStateException("Mandatory attribute 'for'");
          }
  
          UIComponent uiComponent = checkbox.findComponent(forAttr);
          if (uiComponent == null)
          {
              throw new IllegalStateException("Could not find component '" + forAttr
                                              + "' (calling findComponent on component '" + checkbox.getClientId(context) + "')");
          }
          if (!(uiComponent instanceof UISelectMany))
          {
              throw new IllegalStateException("UISelectMany expected");
          }
  
          UISelectMany uiSelectMany = (UISelectMany) uiComponent;
  
          Converter converter;
          try
          {
              converter = RendererUtils.findUISelectManyConverter(context, uiSelectMany);
          }
          catch (FacesException e)
          {
              converter = null;
          }
  
          Set lookupSet = RendererUtils.getSelectedValuesAsSet(context, component, converter, uiSelectMany);
  
          Object itemValue = checkbox.getItemValue();
          String itemStrValue = null;
          if (converter == null)
          {
              if (null != itemValue)
              {
                  itemStrValue = itemValue.toString();
              }
          }
          else
          {
              itemStrValue = converter.getAsString(context, uiSelectMany, itemValue);
          }
  
          renderCheckbox(context,
                         uiSelectMany,
                        itemStrValue,
                        checkbox.getItemLabel(),
                        isDisabled(context,uiSelectMany),
                        lookupSet.contains(itemStrValue),
                        true);
     }
 
     /**
      * @see org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlCheckboxRendererBase#isDisabled(javax.faces.context.FacesContext,
      *      javax.faces.component.UIComponent)
      */
     protected boolean isDisabled(FacesContext facesContext, UIComponent uiComponent)
     {
         return super.isDisabled(facesContext, uiComponent);
     }
 
     /**
      * @see javax.faces.render.Renderer#decode(javax.faces.context.FacesContext,
      *      javax.faces.component.UIComponent)
      */
     public void decode(FacesContext facesContext, UIComponent uiComponent)
     {
         if (uiComponent instanceof HtmlTreeCheckbox)
         {
             //nothing to decode
         }
         else
         {
             super.decode(facesContext, uiComponent);
         }
     }
 }