/*
    * 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.EditableValueHolder;
  import javax.faces.component.UIComponent;
  import javax.faces.context.FacesContext;
  import javax.faces.el.ValueBinding;
  import javax.faces.validator.Validator;
  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 ValidatorELTag}
   */
  public class ValidatorTag extends TagSupport
  {
      private static final long serialVersionUID = 8794036166323016663L;
      private String _validatorId;
      private String _binding;
  
      public void setValidatorId(String validatorId)
      {
          _validatorId = validatorId;
      }
  
      @Override
      public int doStartTag() throws JspException
      {
          UIComponentTag componentTag = UIComponentTag.getParentUIComponentTag(pageContext);
          if (componentTag == null)
          {
              throw new JspException("no parent UIComponentTag found");
          }
          if (!componentTag.getCreated())
          {
              return Tag.SKIP_BODY;
          }
  
          Validator validator = createValidator();
  
          UIComponent component = componentTag.getComponentInstance();
          if (component == null)
          {
              throw new JspException("parent UIComponentTag has no UIComponent");
          }
          if (!(component instanceof EditableValueHolder))
          {
              throw new JspException("UIComponent is no ValueHolder");
          }
          ((EditableValueHolder)component).addValidator(validator);
  
          return Tag.SKIP_BODY;
      }
  
      @Override
      public void release()
      {
          super.release();
          _validatorId = null;
          _binding = null;
      }
  
      /**
       * @throws JspException  
       */
      protected Validator createValidator() throws JspException
      {
          FacesContext facesContext = FacesContext.getCurrentInstance();
          Application application = facesContext.getApplication();
  
          if (_binding != null)
          {
              ValueBinding vb = application.createValueBinding(_binding);
              if (vb != null)
              {
                  Validator validator = (Validator)vb.getValue(facesContext);
                  if (validator != null)
                  {
                     return validator;
                 }
             }
         }
 
         if (UIComponentTag.isValueReference(_validatorId))
         {
             ValueBinding vb = facesContext.getApplication().createValueBinding(_validatorId);
             return application.createValidator((String)vb.getValue(facesContext));
         }
 
         return application.createValidator(_validatorId);
 
     }
 
     /**
      * 
      * @param binding
      * @throws javax.servlet.jsp.JspException
      * 
      * @deprecated
      */
     public void setBinding(java.lang.String binding) throws javax.servlet.jsp.JspException
     {
         if (binding != null && !UIComponentTag.isValueReference(binding))
         {
             throw new IllegalArgumentException("not a valid binding: " + binding);
         }
         _binding = binding;
     }
 }