ELFormTag


1   /*
2    * $Id: ELFormTag.java 160263 2005-04-06 07:44:55Z 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.FormTag;
22  import javax.servlet.jsp.JspException  ;
23  import org.apache.strutsel.taglib.utils.EvalHelper;
24  
25  /**
26   * Custom tag that represents an input form, associated with a bean whose
27   * properties correspond to the various fields of the form.
28   *<p>
29   * This class is a subclass of the class
30   * <code>org.apache.struts.taglib.html.FormTag</code> which provides most of
31   * the described functionality.  This subclass allows all attribute values to
32   * be specified as expressions utilizing the JavaServer Pages Standard Library
33   * expression language.
34   *
35   * @version $Rev: 160263 $
36   */
37  public class ELFormTag extends FormTag {
38  
39      /**
40       * Instance variable mapped to "action" tag attribute.
41       * (Mapping set in associated BeanInfo class.)
42       */
43      private String   actionExpr;
44      /**
45       * Instance variable mapped to "disabled" tag attribute.
46       * (Mapping set in associated BeanInfo class.)
47       */
48      private String   disabledExpr;
49      /**
50       * Instance variable mapped to "enctype" tag attribute.
51       * (Mapping set in associated BeanInfo class.)
52       */
53      private String   enctypeExpr;
54      /**
55       * Instance variable mapped to "focus" tag attribute.
56       * (Mapping set in associated BeanInfo class.)
57       */
58      private String   focusExpr;
59      /**
60       * Instance variable mapped to "focusIndex" tag attribute.
61       * (Mapping set in associated BeanInfo class.)
62       */
63      private String   focusIndexExpr;
64      /**
65       * Instance variable mapped to "method" tag attribute.
66       * (Mapping set in associated BeanInfo class.)
67       */
68      private String   methodExpr;
69      /**
70       * Instance variable mapped to "onreset" tag attribute.
71       * (Mapping set in associated BeanInfo class.)
72       */
73      private String   onresetExpr;
74      /**
75       * Instance variable mapped to "onsubmit" tag attribute.
76       * (Mapping set in associated BeanInfo class.)
77       */
78      private String   onsubmitExpr;
79      /**
80       * Instance variable mapped to "readonly" tag attribute.
81       * (Mapping set in associated BeanInfo class.)
82       */
83      private String   readonlyExpr;
84      /**
85       * Instance variable mapped to "scriptLanguage" tag attribute.
86       * (Mapping set in associated BeanInfo class.)
87       */
88      private String   scriptLanguageExpr;
89      /**
90       * Instance variable mapped to "style" tag attribute.
91       * (Mapping set in associated BeanInfo class.)
92       */
93      private String   styleExpr;
94      /**
95       * Instance variable mapped to "styleClass" tag attribute.
96       * (Mapping set in associated BeanInfo class.)
97       */
98      private String   styleClassExpr;
99      /**
100      * Instance variable mapped to "styleId" tag attribute.
101      * (Mapping set in associated BeanInfo class.)
102      */
103     private String   styleIdExpr;
104     /**
105      * Instance variable mapped to "target" tag attribute.
106      * (Mapping set in associated BeanInfo class.)
107      */
108     private String   targetExpr;
109     /**
110      * Instance variable mapped to "acceptCharset" tag attribute.
111      * (Mapping set in associated BeanInfo class.)
112      */
113     private String   acceptCharsetExpr;
114 
115     /**
116      * Getter method for "action" tag attribute.
117      * (Mapping set in associated BeanInfo class.)
118      */
119     public String   getActionExpr() { return (actionExpr); }
120     /**
121      * Getter method for "disabled" tag attribute.
122      * (Mapping set in associated BeanInfo class.)
123      */
124     public String   getDisabledExpr() { return (disabledExpr); }
125     /**
126      * Getter method for "enctype" tag attribute.
127      * (Mapping set in associated BeanInfo class.)
128      */
129     public String   getEnctypeExpr() { return (enctypeExpr); }
130     /**
131      * Getter method for "focus" tag attribute.
132      * (Mapping set in associated BeanInfo class.)
133      */
134     public String   getFocusExpr() { return (focusExpr); }
135     /**
136      * Getter method for "focusIndex" tag attribute.
137      * (Mapping set in associated BeanInfo class.)
138      */
139     public String   getFocusIndexExpr() { return (focusIndexExpr); }
140     /**
141      * Getter method for "method" tag attribute.
142      * (Mapping set in associated BeanInfo class.)
143      */
144     public String   getMethodExpr() { return (methodExpr); }
145     /**
146      * Getter method for "onreset" tag attribute.
147      * (Mapping set in associated BeanInfo class.)
148      */
149     public String   getOnresetExpr() { return (onresetExpr); }
150     /**
151      * Getter method for "onsubmit" tag attribute.
152      * (Mapping set in associated BeanInfo class.)
153      */
154     public String   getOnsubmitExpr() { return (onsubmitExpr); }
155     /**
156      * Getter method for "readonly" tag attribute.
157      * (Mapping set in associated BeanInfo class.)
158      */
159     public String   getReadonlyExpr() { return (readonlyExpr); }
160     /**
161      * Getter method for "scriptLanguage" tag attribute.
162      * (Mapping set in associated BeanInfo class.)
163      */
164     public String   getScriptLanguageExpr() { return (scriptLanguageExpr); }
165     /**
166      * Getter method for "style" tag attribute.
167      * (Mapping set in associated BeanInfo class.)
168      */
169     public String   getStyleExpr() { return (styleExpr); }
170     /**
171      * Getter method for "styleClass" tag attribute.
172      * (Mapping set in associated BeanInfo class.)
173      */
174     public String   getStyleClassExpr() { return (styleClassExpr); }
175     /**
176      * Getter method for "styleId" tag attribute.
177      * (Mapping set in associated BeanInfo class.)
178      */
179     public String   getStyleIdExpr() { return (styleIdExpr); }
180     /**
181      * Getter method for "target" tag attribute.
182      * (Mapping set in associated BeanInfo class.)
183      */
184     public String   getTargetExpr() { return (targetExpr); }
185     /**
186      * Getter method for "acceptCharset" tag attribute.
187      * (Mapping set in associated BeanInfo class.)
188      */
189     public String   getAcceptCharsetExpr() { return (acceptCharsetExpr); }
190 
191     /**
192      * Setter method for "action" tag attribute.
193      * (Mapping set in associated BeanInfo class.)
194      */
195     public void setActionExpr(String   actionExpr) { this.actionExpr = actionExpr; }
196     /**
197      * Setter method for "disabled" tag attribute.
198      * (Mapping set in associated BeanInfo class.)
199      */
200     public void setDisabledExpr(String   disabledExpr) { this.disabledExpr = disabledExpr; }
201     /**
202      * Setter method for "enctype" tag attribute.
203      * (Mapping set in associated BeanInfo class.)
204      */
205     public void setEnctypeExpr(String   enctypeExpr) { this.enctypeExpr = enctypeExpr; }
206     /**
207      * Setter method for "focus" tag attribute.
208      * (Mapping set in associated BeanInfo class.)
209      */
210     public void setFocusExpr(String   focusExpr) { this.focusExpr = focusExpr; }
211     /**
212      * Setter method for "focusIndex" tag attribute.
213      * (Mapping set in associated BeanInfo class.)
214      */
215     public void setFocusIndexExpr(String   focusIndexExpr) { this.focusIndexExpr = focusIndexExpr; }
216     /**
217      * Setter method for "method" tag attribute.
218      * (Mapping set in associated BeanInfo class.)
219      */
220     public void setMethodExpr(String   methodExpr) { this.methodExpr = methodExpr; }
221     /**
222      * Setter method for "onreset" tag attribute.
223      * (Mapping set in associated BeanInfo class.)
224      */
225     public void setOnresetExpr(String   onresetExpr) { this.onresetExpr = onresetExpr; }
226     /**
227      * Setter method for "onsubmit" tag attribute.
228      * (Mapping set in associated BeanInfo class.)
229      */
230     public void setOnsubmitExpr(String   onsubmitExpr) { this.onsubmitExpr = onsubmitExpr; }
231     /**
232      * Setter method for "readonly" tag attribute.
233      * (Mapping set in associated BeanInfo class.)
234      */
235     public void setReadonlyExpr(String   readonlyExpr) { this.readonlyExpr = readonlyExpr; }
236     /**
237      * Setter method for "scriptLanguage" tag attribute.
238      * (Mapping set in associated BeanInfo class.)
239      */
240     public void setScriptLanguageExpr(String   scriptLanguageExpr) { this.scriptLanguageExpr = scriptLanguageExpr; }
241     /**
242      * Setter method for "style" tag attribute.
243      * (Mapping set in associated BeanInfo class.)
244      */
245     public void setStyleExpr(String   styleExpr) { this.styleExpr = styleExpr; }
246     /**
247      * Setter method for "styleClass" tag attribute.
248      * (Mapping set in associated BeanInfo class.)
249      */
250     public void setStyleClassExpr(String   styleClassExpr) { this.styleClassExpr = styleClassExpr; }
251     /**
252      * Setter method for "styleId" tag attribute.
253      * (Mapping set in associated BeanInfo class.)
254      */
255     public void setStyleIdExpr(String   styleIdExpr) { this.styleIdExpr = styleIdExpr; }
256     /**
257      * Setter method for "target" tag attribute.
258      * (Mapping set in associated BeanInfo class.)
259      */
260     public void setTargetExpr(String   targetExpr) { this.targetExpr = targetExpr; }
261     /**
262      * Setter method for "acceptCharset" tag attribute.
263      * (Mapping set in associated BeanInfo class.)
264      */
265     public void setAcceptCharsetExpr(String   acceptCharsetExpr) { this.acceptCharsetExpr = acceptCharsetExpr; }
266 
267     /**
268      * Resets attribute values for tag reuse.
269      */
270     public void release()
271     {
272         super.release();
273         setActionExpr(null);
274         setDisabledExpr(null);
275         setEnctypeExpr(null);
276         setFocusExpr(null);
277         setFocusIndexExpr(null);
278         setMethodExpr(null);
279         setOnresetExpr(null);
280         setOnsubmitExpr(null);
281         setReadonlyExpr(null);
282         setScriptLanguageExpr(null);
283         setStyleExpr(null);
284         setStyleClassExpr(null);
285         setStyleIdExpr(null);
286         setTargetExpr(null);
287         setAcceptCharsetExpr(null);
288     }
289     
290     /**
291      * Process the start tag.
292      *
293      * @exception JspException if a JSP exception has occurred
294      */
295     public int doStartTag() throws JspException   {
296         evaluateExpressions();
297         return(super.doStartTag());
298     }
299 
300     /**
301      * Processes all attribute values which use the JSTL expression evaluation
302      * engine to determine their values.
303      *
304      * @exception JspException if a JSP exception has occurred
305      */
306     private void evaluateExpressions() throws JspException   {
307         String    string  = null;
308         Boolean   bool    = null;
309 
310         if ((string = EvalHelper.evalString("action", getActionExpr(),
311                                             this, pageContext)) != null)
312             setAction(string);
313 
314         if ((bool = EvalHelper.evalBoolean("disabled", getDisabledExpr(),
315                                            this, pageContext)) != null)
316             setDisabled(bool.booleanValue());
317 
318         if ((string = EvalHelper.evalString("enctype", getEnctypeExpr(),
319                                             this, pageContext)) != null)
320             setEnctype(string);
321 
322         if ((string = EvalHelper.evalString("focus", getFocusExpr(),
323                                             this, pageContext)) != null)
324             setFocus(string);
325 
326         if ((string = EvalHelper.evalString("focusIndex", getFocusIndexExpr(),
327                                             this, pageContext)) != null)
328             setFocusIndex(string);
329 
330         if ((string = EvalHelper.evalString("method", getMethodExpr(),
331                                             this, pageContext)) != null)
332             setMethod(string);
333 
334         if ((string = EvalHelper.evalString("onreset", getOnresetExpr(),
335                                             this, pageContext)) != null)
336             setOnreset(string);
337 
338         if ((string = EvalHelper.evalString("onsubmit", getOnsubmitExpr(),
339                                             this, pageContext)) != null)
340             setOnsubmit(string);
341 
342         if ((bool = EvalHelper.evalBoolean("readonly", getReadonlyExpr(),
343                                            this, pageContext)) != null)
344             setReadonly(bool.booleanValue());
345 
346        if ((bool = EvalHelper.evalBoolean("scriptLanguage", getScriptLanguageExpr(),
347                                           this, pageContext)) != null)
348            setScriptLanguage(bool.booleanValue());
349 
350         if ((string = EvalHelper.evalString("style", getStyleExpr(),
351                                             this, pageContext)) != null)
352             setStyle(string);
353 
354         if ((string = EvalHelper.evalString("styleClass", getStyleClassExpr(),
355                                             this, pageContext)) != null)
356             setStyleClass(string);
357 
358         if ((string = EvalHelper.evalString("styleId", getStyleIdExpr(),
359                                             this, pageContext)) != null)
360             setStyleId(string);
361 
362         if ((string = EvalHelper.evalString("target", getTargetExpr(),
363                                             this, pageContext)) != null)
364             setTarget(string);
365 
366         if ((string = EvalHelper.evalString("acceptCharset", getAcceptCharsetExpr(),
367                                             this, pageContext)) != null)
368             setAcceptCharset(string);
369 
370     }
371 }
372
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