/*
    * 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 javax.faces.webapp;
  
  import javax.faces.application.Application;
  import javax.faces.component.UIComponent;
  import javax.faces.component.ValueHolder;
  import javax.faces.context.FacesContext;
  import javax.faces.convert.Converter;
  import javax.faces.el.ValueBinding;
  import javax.servlet.jsp.JspException;
  import javax.servlet.jsp.tagext.Tag;
  import javax.servlet.jsp.tagext.TagSupport;
  
  /**
   * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
   * 
   * @deprecated replaced by {@link ConverterELTag}
   */
  public class ConverterTag extends TagSupport
  {
      private static final long serialVersionUID = -6168345066829108081L;
      private String _converterId;
      private String _binding;
  
      public ConverterTag()
      {
          super();
      }
  
      public void setConverterId(String converterId)
      {
          _converterId = converterId;
      }
  
      @Override
      public int doStartTag() throws JspException
      {
  
          UIComponentClassicTagBase componentTag =
                  UIComponentClassicTagBase.getParentUIComponentClassicTagBase(pageContext);
  
          if (componentTag == null)
          {
              throw new JspException("no parent UIComponentTag found");
          }
          if (!componentTag.getCreated())
          {
              return Tag.SKIP_BODY;
          }
  
          Converter converter = createConverter();
  
          UIComponent component = componentTag.getComponentInstance();
          if (component == null)
          {
              throw new JspException("parent UIComponentTag has no UIComponent");
          }
          if (!(component instanceof ValueHolder))
          {
              throw new JspException("UIComponent is no ValueHolder");
          }
          ((ValueHolder)component).setConverter(converter);
  
          return Tag.SKIP_BODY;
      }
  
      @Override
      public void release()
      {
          super.release();
          _converterId = null;
          _binding = null;
      }
  
      /**
       * @throws JspException  
       */
      protected Converter createConverter() throws JspException
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          Application application = facesContext.getApplication();
  
         if (_binding != null)
         {
             ValueBinding vb = application.createValueBinding(_binding);
             if (vb != null)
             {
                 Converter converter = (Converter)vb.getValue(facesContext);
                 if (converter != null)
                 {
                     return converter;
                 }
             }
         }
 
         if (UIComponentTag.isValueReference(_converterId))
         {
             ValueBinding vb = facesContext.getApplication().createValueBinding(_converterId);
             return application.createConverter((String)vb.getValue(facesContext));
         }
 
         return application.createConverter(_converterId);
 
     }
 
     /**
      * @throws JspException  
      */
     public void setBinding(String binding) throws JspException
     {
         _binding = binding;
     }
 }