001 /* 002 * Copyright 1999-2001,2004 The Apache Software Foundation. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017 package org.apache.commons.latka.jelly; 018 019 import org.apache.commons.jelly.JellyTagException; 020 import org.apache.commons.jelly.TagSupport; 021 import org.apache.commons.jelly.XMLOutput; 022 023 import org.apache.commons.latka.LatkaException; 024 import org.apache.commons.latka.http.Response; 025 026 /** 027 * 028 * @author Morgan Delagrange 029 */ 030 public class ValidateTag extends TagSupport { 031 032 /** 033 * make sure the request executes, then call validators. 034 * 035 * @param xmlOutput a place to write output 036 * @throws JellyTagException if the body of the tag could not be invoked, or an HTTP 037 * response could not be obtained 038 */ 039 public void doTag(XMLOutput xmlOutput) throws JellyTagException { 040 041 // execute the request 042 Response response = null; 043 try { 044 response = getResponse(); 045 } catch (LatkaException e) { 046 throw new JellyTagException("could not obtain HTTP response",e); 047 } 048 049 // perform the validations, skip the validations 050 // if a response could not be obtained 051 if (response != null) { 052 invokeBody(xmlOutput); 053 } 054 055 } 056 057 protected Response getResponse() throws LatkaException { 058 RequestTag tag = (RequestTag) findAncestorWithClass(RequestTag.class); 059 return tag.getResponse(); 060 } 061 062 }