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1   /*
2    * $Id: NestedOptionsTag.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.Constants;
24  import org.apache.struts.taglib.html.OptionsTag;
25  import org.apache.struts.taglib.nested.NestedNameSupport;
26  import org.apache.struts.taglib.nested.NestedPropertyHelper;
27  
28  import javax.servlet.http.HttpServletRequest;
29  import javax.servlet.jsp.JspException;
30  
31  /**
32   * NestedOptionsTag.
33   *
34   * @version $Rev: 471754 $ $Date: 2004-10-16 12:38:42 -0400 (Sat, 16 Oct 2004)
35   *          $
36   * @since Struts 1.1
37   */
38  public class NestedOptionsTag extends OptionsTag implements NestedNameSupport {
39      /* the usual private member variables */
40      private String originalName = null;
41      private String originalProperty = null;
42      private String originalLabelProperty = null;
43  
44      /**
45       * Overriding method of the heart of the matter. Gets the relative
46       * property and leaves the rest up to the original tag implementation.
47       * Sweet.
48       *
49       * @return int JSP continuation directive. This is in the hands of the
50       *         super class.
51       */
52      public int doStartTag() throws JspException {
53          // get the original properties
54          originalName = getName();
55          originalProperty = getProperty();
56          originalLabelProperty = getLabelProperty();
57  
58          // request
59          HttpServletRequest request =
60              (HttpServletRequest) pageContext.getRequest();
61  
62          // if we have a label property
63          if (originalLabelProperty != null) {
64              // do the label property first
65              if ((getName() == null) || Constants.BEAN_KEY.equals(getName())) {
66                  super.setLabelProperty(NestedPropertyHelper.getAdjustedProperty(
67                          request, originalLabelProperty));
68              } else {
69                  super.setLabelProperty(originalLabelProperty);
70              }
71          }
72  
73          // set the other properties
74          NestedPropertyHelper.setNestedProperties(request, this);
75  
76          // let the super do it's thing
77          return super.doStartTag();
78      }
79  
80      /**
81       * Complete the processing of the tag. The nested tags here will restore
82       * all the original value for the tag itself and the nesting context.
83       *
84       * @return int to describe the next step for the JSP processor
85       * @throws JspException for the bad things JSP's do
86       */
87      public int doEndTag() throws JspException {
88          // do the super's ending part
89          int i = super.doEndTag();
90  
91          // reset the properties
92          setName(originalName);
93          setProperty(originalProperty);
94          setLabelProperty(originalLabelProperty);
95  
96          // continue
97          return i;
98      }
99  
100     /**
101      * Release the tag's resources and reset the values.
102      */
103     public void release() {
104         super.release();
105 
106         // reset the originals
107         originalName = null;
108         originalProperty = null;
109         originalLabelProperty = null;
110     }
111 }