/*

  * 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>

  *

  * @author Manfred Geiler (latest modification by $Author: skitching $)

  * @version $Revision: 676298 $ $Date: 2008-07-13 05:31:48 -0500 (Sun, 13 Jul 2008) $

  *

  * @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;

     }

     public int doStartTag()

             throws javax.servlet.jsp.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;

     }

     public void release()

     {

         super.release();

         _validatorId = null;

         _binding = null;

     }

     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;

     }

 }