/*

  * Copyright 1999-2001,2004 The Apache Software Foundation.

  * 

  * Licensed 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.commons.latka.jelly;

 import org.apache.commons.jelly.JellyTagException;

 import org.apache.commons.jelly.TagSupport;

 import org.apache.commons.jelly.XMLOutput;

 import org.apache.commons.latka.LatkaException;

 import org.apache.commons.latka.http.Response;

 /**

  *

  * @author  Morgan Delagrange

  */

 public class ValidateTag extends TagSupport {

     /**

      *  make sure the request executes, then call validators.

      *

      * @param xmlOutput a place to write output

      * @throws JellyTagException if the body of the tag could not be invoked, or an HTTP

      *    response could not be obtained

      */

     public void doTag(XMLOutput xmlOutput) throws JellyTagException {

         // execute the request

         Response response = null;

         try {

             response = getResponse();

         } catch (LatkaException e) {

             throw new JellyTagException("could not obtain HTTP response",e);

         }

         // perform the validations, skip the validations

         // if a response could not be obtained

         if (response != null) {

             invokeBody(xmlOutput);

         }

     }

     protected Response getResponse() throws LatkaException {

         RequestTag tag = (RequestTag) findAncestorWithClass(RequestTag.class);

         return tag.getResponse();

     }

 }