1 /* 2 * $Id: NestedMessageTag.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.bean; 22 23 import org.apache.struts.taglib.bean.MessageTag; 24 import org.apache.struts.taglib.nested.NestedNameSupport; 25 import org.apache.struts.taglib.nested.NestedPropertyHelper; 26 27 import javax.servlet.http.HttpServletRequest; 28 import javax.servlet.jsp.JspException; 29 30 /** 31 * NestedWriteTag. 32 * 33 * @version $Rev: 471754 $ 34 * @since Struts 1.1 35 */ 36 public class NestedMessageTag extends MessageTag implements NestedNameSupport { 37 /* the usual private member variables */ 38 private String originalName = null; 39 private String originalProperty = null; 40 41 /** 42 * Overriding method of the heart of the matter. Gets the relative 43 * property and leaves the rest up to the original tag implementation. 44 * Sweet. 45 * 46 * @return int JSP continuation directive. This is in the hands of the 47 * super class. 48 */ 49 public int doStartTag() throws JspException { 50 // get the original properties 51 originalName = getName(); 52 originalProperty = getProperty(); 53 54 // request 55 HttpServletRequest request = 56 (HttpServletRequest) pageContext.getRequest(); 57 58 // set the properties 59 NestedPropertyHelper.setNestedProperties(request, this); 60 61 // let the super do it's thing 62 return super.doStartTag(); 63 } 64 65 /** 66 * Complete the processing of the tag. The nested tags here will restore 67 * all the original value for the tag itself and the nesting context. 68 * 69 * @return int to describe the next step for the JSP processor 70 * @throws JspException for the bad things JSP's do 71 */ 72 public int doEndTag() throws JspException { 73 // do the super's ending part 74 int i = super.doEndTag(); 75 76 // reset the properties 77 setName(originalName); 78 setProperty(originalProperty); 79 80 // continue 81 return i; 82 } 83 84 /** 85 * Release the tag's resources and reset the values. 86 */ 87 public void release() { 88 super.release(); 89 90 // reset the originals 91 originalName = null; 92 originalProperty = null; 93 } 94 }