View Javadoc

1   /*
2    * $Id: NestedNotMatchTag.java 376843 2006-02-10 21:02:56Z husted $
3    *
4    * Copyright 1999-2004 The Apache Software Foundation.
5    *
6    * Licensed under the Apache License, Version 2.0 (the "License");
7    * you may not use this file except in compliance with the License.
8    * You may obtain a copy of the License at
9    *
10   *      http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.struts.taglib.nested.logic;
19  
20  import org.apache.struts.taglib.logic.NotMatchTag;
21  import org.apache.struts.taglib.nested.NestedNameSupport;
22  import org.apache.struts.taglib.nested.NestedPropertyHelper;
23  
24  import javax.servlet.http.HttpServletRequest;
25  import javax.servlet.jsp.JspException;
26  
27  /***
28   * NestedNotMatchTag.
29   *
30   * @version $Rev: 376843 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
31   *          $
32   * @since Struts 1.1
33   */
34  public class NestedNotMatchTag extends NotMatchTag implements NestedNameSupport {
35      /* the usual private member variables */
36      private String originalName = null;
37      private String originalProperty = null;
38  
39      /***
40       * Overriding method of the heart of the matter. Gets the relative
41       * property and leaves the rest up to the original tag implementation.
42       * Sweet.
43       *
44       * @return int JSP continuation directive. This is in the hands of the
45       *         super class.
46       */
47      public int doStartTag() throws JspException {
48          // get the original properties
49          originalName = getName();
50          originalProperty = getProperty();
51  
52          // request
53          HttpServletRequest request =
54              (HttpServletRequest) pageContext.getRequest();
55  
56          // set the properties
57          NestedPropertyHelper.setNestedProperties(request, this);
58  
59          // let the super do it's thing
60          return super.doStartTag();
61      }
62  
63      /***
64       * Complete the processing of the tag. The nested tags here will restore
65       * all the original value for the tag itself and the nesting context.
66       *
67       * @return int to describe the next step for the JSP processor
68       * @throws JspException for the bad things JSP's do
69       */
70      public int doEndTag() throws JspException {
71          // do the super's ending part
72          int i = super.doEndTag();
73  
74          // reset the properties
75          setName(originalName);
76          setProperty(originalProperty);
77  
78          // continue
79          return i;
80      }
81  
82      /***
83       * Release the tag's resources and reset the values.
84       */
85      public void release() {
86          super.release();
87  
88          // reset the originals
89          originalName = null;
90          originalProperty = null;
91      }
92  }