1 /* 2 * $Id: NestedMessagesTag.java 471754 2006-11-06 14:55:09Z husted $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 package org.apache.struts.taglib.nested.html; 22 23 import org.apache.struts.taglib.html.MessagesTag; 24 import org.apache.struts.taglib.nested.NestedPropertyHelper; 25 import org.apache.struts.taglib.nested.NestedPropertySupport; 26 27 import javax.servlet.http.HttpServletRequest; 28 import javax.servlet.jsp.JspException; 29 30 /** 31 * NestedMessagesTag. 32 * 33 * @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004) 34 * $ 35 * @since Struts 1.1 36 */ 37 public class NestedMessagesTag extends MessagesTag 38 implements NestedPropertySupport { 39 /* the usual private member variables */ 40 private String originalName = null; 41 private String originalProperty = null; 42 43 /** 44 * Overriding method of the heart of the matter. Gets the relative 45 * property and leaves the rest up to the original tag implementation. 46 * Sweet. 47 * 48 * @return int JSP continuation directive. This is in the hands of the 49 * super class. 50 */ 51 public int doStartTag() throws JspException { 52 // get the original properties 53 originalName = getName(); 54 originalProperty = getProperty(); 55 56 // request 57 HttpServletRequest request = 58 (HttpServletRequest) pageContext.getRequest(); 59 60 // set the properties 61 NestedPropertyHelper.setNestedProperties(request, this); 62 63 // let the super do it's thing 64 return super.doStartTag(); 65 } 66 67 /** 68 * Complete the processing of the tag. The nested tags here will restore 69 * all the original value for the tag itself and the nesting context. 70 * 71 * @return int to describe the next step for the JSP processor 72 * @throws JspException for the bad things JSP's do 73 */ 74 public int doEndTag() throws JspException { 75 // do the super's ending part 76 int i = super.doEndTag(); 77 78 // reset the properties 79 setName(originalName); 80 setProperty(originalProperty); 81 82 // continue 83 return i; 84 } 85 86 /** 87 * Release the tag's resources and reset the values. 88 */ 89 public void release() { 90 super.release(); 91 92 // reset the originals 93 originalName = null; 94 originalProperty = null; 95 } 96 }