/*
    * 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.view.facelets.pss.acid.component;
  
  import java.util.HashMap;
  import java.util.Map;
  import javax.faces.component.FacesComponent;
  import javax.faces.component.UIComponent;
  import javax.faces.component.UIComponentBase;
  import javax.faces.component.UIViewRoot;
  import javax.faces.component.html.HtmlOutputText;
  import javax.faces.context.FacesContext;
  import javax.faces.event.AbortProcessingException;
  import javax.faces.event.PreRenderViewEvent;
  import javax.faces.event.SystemEvent;
  import javax.faces.event.SystemEventListener;
  import javax.faces.view.ViewDeclarationLanguage;
  
  @FacesComponent(value = "com.myapp.UIAddSimpleComponentVDL")
  public class UIAddSimpleComponentVDL extends UIComponentBase implements
          SystemEventListener
  {
  
      //
      // Constructor
      //
  
      public UIAddSimpleComponentVDL()
      {
          setRendererType(null);
  
          FacesContext context = FacesContext.getCurrentInstance();
          UIViewRoot root = context.getViewRoot();
  
          root.subscribeToViewEvent(PreRenderViewEvent.class, this);
      }
  
      //
      // Public methods
      //
  
      @Override
      public String getFamily()
      {
  
          return "com.myapp";
      }
  
      public boolean isListenerForSource(Object source)
      {
  
          return (source instanceof UIViewRoot);
      }
  
      public void processEvent(SystemEvent event) throws AbortProcessingException
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          if (!facesContext.isPostback())
          {
              ViewDeclarationLanguage vdl = facesContext.getApplication().
                  getViewHandler().getViewDeclarationLanguage(
                      facesContext, facesContext.getViewRoot().getViewId());
              
              Map<String, Object> attributes = new HashMap<String, Object>();
              attributes.put("value", "Dynamically added child");
              
              UIComponent component = vdl.createComponent(facesContext, 
                  "http://java.sun.com/jsf/html", 
                  "outputText", attributes);
              getChildren().add(component);
          }
      }
  }