1 /*
2 * $Id: NestedNotPresentTag.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.logic;
22
23 import org.apache.struts.taglib.logic.NotPresentTag;
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 * NestedNotPresentTag.
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 NestedNotPresentTag extends NotPresentTag
38 implements NestedNameSupport {
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 }