ELJavascriptValidatorTag


1   /*
2    * $Id: ELJavascriptValidatorTag.java 160033 2005-04-04 12:06:45Z niallp $ 
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  
19  package org.apache.strutsel.taglib.html;
20  
21  import org.apache.struts.taglib.html.JavascriptValidatorTag;
22  import javax.servlet.jsp.JspException  ;
23  import org.apache.strutsel.taglib.utils.EvalHelper;
24  
25  /**
26   * Custom tag that generates JavaScript for client side validation based
27   * on the validation rules loaded by the <code>ValidatorPlugIn</code>
28   * defined in the struts-config.xml file.
29   *<p>
30   * This class is a subclass of the class
31   * <code>org.apache.struts.taglib.html.JavascriptValidatorTag</code> which
32   * provides most of the described functionality.  This subclass allows all
33   * attribute values to be specified as expressions utilizing the JavaServer
34   * Pages Standard Library expression language.
35   *
36   * @version $Rev: 160033 $
37   */
38  public class ELJavascriptValidatorTag extends JavascriptValidatorTag {
39  
40      /**
41       * Instance variable mapped to "cdata" tag attribute.
42       * (Mapping set in associated BeanInfo class.)
43       */
44      private String   cdataExpr;
45      /**
46       * Instance variable mapped to "dynamicJavascript" tag attribute.
47       * (Mapping set in associated BeanInfo class.)
48       */
49      private String   dynamicJavascriptExpr;
50      /**
51       * Instance variable mapped to "formName" tag attribute.
52       * (Mapping set in associated BeanInfo class.)
53       */
54      private String   formNameExpr;
55      /**
56       * Instance variable mapped to "method" tag attribute.
57       * (Mapping set in associated BeanInfo class.)
58       */
59      private String   methodExpr;
60      /**
61       * Instance variable mapped to "page" tag attribute.
62       * (Mapping set in associated BeanInfo class.)
63       */
64      private String   pageExpr;
65      /**
66       * Instance variable mapped to "scriptLanguage" tag attribute.
67       * (Mapping set in associated BeanInfo class.)
68       */
69      private String   scriptLanguageExpr;
70      /**
71       * Instance variable mapped to "src" tag attribute.
72       * (Mapping set in associated BeanInfo class.)
73       */
74      private String   srcExpr;
75      /**
76       * Instance variable mapped to "staticJavascript" tag attribute.
77       * (Mapping set in associated BeanInfo class.)
78       */
79      private String   staticJavascriptExpr;
80      /**
81       * Instance variable mapped to "htmlComment" tag attribute.
82       * (Mapping set in associated BeanInfo class.)
83       */
84      private String   htmlCommentExpr;
85      /**
86       * Instance variable mapped to "bundle" tag attribute.
87       * (Mapping set in associated BeanInfo class.)
88       */
89      private String   bundleExpr;
90  
91      /**
92       * Getter method for "cdata" tag attribute.
93       * (Mapping set in associated BeanInfo class.)
94       */
95      public String   getCdataExpr() { return (cdataExpr); }
96      /**
97       * Getter method for "dynamicJavascript" tag attribute.
98       * (Mapping set in associated BeanInfo class.)
99       */
100     public String   getDynamicJavascriptExpr() { return (dynamicJavascriptExpr); }
101     /**
102      * Getter method for "formName" tag attribute.
103      * (Mapping set in associated BeanInfo class.)
104      */
105     public String   getFormNameExpr() { return (formNameExpr); }
106     /**
107      * Getter method for "method" tag attribute.
108      * (Mapping set in associated BeanInfo class.)
109      */
110     public String   getMethodExpr() { return (methodExpr); }
111     /**
112      * Getter method for "page" tag attribute.
113      * (Mapping set in associated BeanInfo class.)
114      */
115     public String   getPageExpr() { return (pageExpr); }
116     /**
117      * Getter method for "scriptLanguage" tag attribute.
118      * (Mapping set in associated BeanInfo class.)
119      */
120     public String   getScriptLanguageExpr() { return (scriptLanguageExpr); }
121     /**
122      * Getter method for "src" tag attribute.
123      * (Mapping set in associated BeanInfo class.)
124      */
125     public String   getSrcExpr() { return (srcExpr); }
126     /**
127      * Getter method for "staticJavascript" tag attribute.
128      * (Mapping set in associated BeanInfo class.)
129      */
130     public String   getStaticJavascriptExpr() { return (staticJavascriptExpr); }
131     /**
132      * Getter method for "htmlComment" tag attribute.
133      * (Mapping set in associated BeanInfo class.)
134      */
135     public String   getHtmlCommentExpr() { return (htmlCommentExpr); }
136     /**
137      * Getter method for "bundle" tag attribute.
138      * (Mapping set in associated BeanInfo class.)
139      */
140     public String   getBundleExpr() { return (bundleExpr); }
141 
142     /**
143      * Setter method for "cdata" tag attribute.
144      * (Mapping set in associated BeanInfo class.)
145      */
146     public void setCdataExpr(String   cdataExpr) { this.cdataExpr = cdataExpr; }
147     /**
148      * Setter method for "dynamicJavascript" tag attribute.
149      * (Mapping set in associated BeanInfo class.)
150      */
151     public void setDynamicJavascriptExpr(String   dynamicJavascriptExpr) { this.dynamicJavascriptExpr = dynamicJavascriptExpr; }
152     /**
153      * Setter method for "formName" tag attribute.
154      * (Mapping set in associated BeanInfo class.)
155      */
156     public void setFormNameExpr(String   formNameExpr) { this.formNameExpr = formNameExpr; }
157     /**
158      * Setter method for "method" tag attribute.
159      * (Mapping set in associated BeanInfo class.)
160      */
161     public void setMethodExpr(String   methodExpr) { this.methodExpr = methodExpr; }
162     /**
163      * Setter method for "page" tag attribute.
164      * (Mapping set in associated BeanInfo class.)
165      */
166     public void setPageExpr(String   pageExpr) { this.pageExpr = pageExpr; }
167     /**
168      * Setter method for "scriptLanguage" tag attribute.
169      * (Mapping set in associated BeanInfo class.)
170      */
171     public void setScriptLanguageExpr(String   scriptLanguageExpr) { this.scriptLanguageExpr = scriptLanguageExpr; }
172     /**
173      * Setter method for "src" tag attribute.
174      * (Mapping set in associated BeanInfo class.)
175      */
176     public void setSrcExpr(String   srcExpr) { this.srcExpr = srcExpr; }
177     /**
178      * Setter method for "staticJavascript" tag attribute.
179      * (Mapping set in associated BeanInfo class.)
180      */
181     public void setStaticJavascriptExpr(String   staticJavascriptExpr) { this.staticJavascriptExpr = staticJavascriptExpr; }
182     /**
183      * Setter method for "htmlComment" tag attribute.
184      * (Mapping set in associated BeanInfo class.)
185      */
186     public void setHtmlCommentExpr(String   htmlCommentExpr) { this.htmlCommentExpr = htmlCommentExpr; }
187     /**
188      * Setter method for "bundle" tag attribute.
189      * (Mapping set in associated BeanInfo class.)
190      */
191     public void setBundleExpr(String   bundleExpr) { this.bundleExpr = bundleExpr; }
192 
193     /**
194      * Resets attribute values for tag reuse.
195      */
196     public void release()
197     {
198         super.release();
199         setCdataExpr(null);
200         setDynamicJavascriptExpr(null);
201         setFormNameExpr(null);
202         setMethodExpr(null);
203         setPageExpr(null);
204         setScriptLanguageExpr(null);
205         setSrcExpr(null);
206         setStaticJavascriptExpr(null);
207         setHtmlCommentExpr(null);
208         setBundleExpr(null);
209     }
210 
211     /**
212      * Process the start tag.
213      *
214      * @exception JspException if a JSP exception has occurred
215      */
216     public int doStartTag() throws JspException   {
217         evaluateExpressions();
218         return (super.doStartTag());
219     }
220     
221     /**
222      * Processes all attribute values which use the JSTL expression evaluation
223      * engine to determine their values.
224      *
225      * @exception JspException if a JSP exception has occurred
226      */
227     private void evaluateExpressions() throws JspException   {
228         String    string  = null;
229         Integer   integer = null;
230         Boolean   bool    = null;
231 
232         if ((string = EvalHelper.evalString("cdata", getCdataExpr(),
233                                             this, pageContext)) != null)
234             setCdata(string);
235 
236         if ((string = EvalHelper.evalString("dynamicJavascript", getDynamicJavascriptExpr(),
237                                             this, pageContext)) != null)
238             setDynamicJavascript(string);
239 
240         if ((string = EvalHelper.evalString("formName", getFormNameExpr(),
241                                             this, pageContext)) != null)
242             setFormName(string);
243 
244         if ((string = EvalHelper.evalString("method", getMethodExpr(),
245                                             this, pageContext)) != null)
246             setMethod(string);
247 
248         if ((integer = EvalHelper.evalInteger("page", getPageExpr(),
249                                               this, pageContext)) != null)
250             setPage(integer.intValue());
251 
252         if ((bool = EvalHelper.evalBoolean("scriptLanguage", getScriptLanguageExpr(),
253                                            this, pageContext)) != null)
254             setScriptLanguage(bool.booleanValue());
255 
256         if ((string = EvalHelper.evalString("src", getSrcExpr(),
257                                             this, pageContext)) != null)
258             setSrc(string);
259 
260         if ((string = EvalHelper.evalString("staticJavascript", getStaticJavascriptExpr(),
261                                             this, pageContext)) != null)
262             setStaticJavascript(string);
263 
264         if ((string = EvalHelper.evalString("htmlComment", getHtmlCommentExpr(),
265                                             this, pageContext)) != null)
266             setHtmlComment(string);
267 
268         if ((string = EvalHelper.evalString("bundle", getBundleExpr(),
269                                             this, pageContext)) != null)
270             setBundle(string);
271     }
272 }
273
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