1 /**
2 * Licensed under the Artistic License; you may not use this file
3 * except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://displaytag.sourceforge.net/license.html
7 *
8 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
9 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
10 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
11 */
12 package org.displaytag.tags.el;
13
14 import javax.servlet.jsp.JspException;
15
16
17 /**
18 * Adds EL support to displaytag's TableTag.
19 * @author Tim McCune
20 * @author Fabrizio Giustina
21 * @version $Revision: 1081 $ ($Author: fgiust $)
22 */
23 public class ELTableTag extends org.displaytag.tags.TableTag
24 {
25
26 /**
27 * D1597A17A6.
28 */
29 private static final long serialVersionUID = 899149338534L;
30
31 /**
32 * Expression for the "class" tag attribute.
33 */
34 private String classExpr;
35
36 /**
37 * Expression for the "cellpadding" tag attribute.
38 */
39 private String cellpaddingExpr;
40
41 /**
42 * Expression for the "cellspacing" tag attribute.
43 */
44 private String cellspacingExpr;
45
46 /**
47 * Expression for the "decorator" tag attribute.
48 */
49 private String decoratorExpr;
50
51 /**
52 * Expression for the "defaultsort" tag attribute.
53 */
54 private String defaultsortExpr;
55
56 /**
57 * Expression for the "defaultorder" tag attribute.
58 */
59 private String defaultorderExpr;
60
61 /**
62 * Expression for the "export" tag attribute.
63 */
64 private String exportExpr;
65
66 /**
67 * Expression for the "frame" tag attribute.
68 */
69 private String frameExpr;
70
71 /**
72 * Expression for the "length" tag attribute.
73 */
74 private String lengthExpr;
75
76 /**
77 * Expression for the "name" tag attribute.
78 */
79 private String nameExpr;
80
81 /**
82 * Expression for the "offset" tag attribute.
83 */
84 private String offsetExpr;
85
86 /**
87 * Expression for the "pagesize" tag attribute.
88 */
89 private String pagesizeExpr;
90
91 /**
92 * Expression for the "partialList" tag attribute.
93 */
94 private String partialListExpr;
95
96 /**
97 * Expression for the "requestURI" tag attribute.
98 */
99 private String requestURIExpr;
100
101 /**
102 * Expression for the "requestURIcontext" tag attribute.
103 */
104 private String requestURIcontextExpr;
105
106 /**
107 * Expression for the "rules" tag attribute.
108 */
109 private String rulesExpr;
110
111 /**
112 * Expression for the "size" tag attribute
113 */
114 private String sizeExpr;
115
116 /**
117 * Expression for the "sort" tag attribute.
118 */
119 private String sortExpr;
120
121 /**
122 * Expression for the "style" tag attribute.
123 */
124 private String styleExpr;
125
126 /**
127 * Expression for the "summary" tag attribute.
128 */
129 private String summaryExpr;
130
131 /**
132 * Expression for the "excludedParams" tag attribute.
133 */
134 private String excludedParamsExpr;
135
136 /**
137 * Expression for the "id" tag attribute.
138 */
139 private String idExpr;
140
141 /**
142 * Expression for the "htmlId" tag attribute.
143 */
144 private String htmlIdExpr;
145
146 /**
147 * @see org.displaytag.tags.TableTag#setUid(java.lang.String)
148 */
149 public void setUid(String value)
150 {
151 idExpr = value;
152 }
153
154 /**
155 * @see org.displaytag.tags.TableTag#setCellpadding(java.lang.String)
156 * @param value EL expression for attribute value
157 */
158 public void setCellpadding(String value)
159 {
160 cellpaddingExpr = value;
161 }
162
163 /**
164 * @see org.displaytag.tags.TableTag#setStyle(java.lang.String)
165 * @param value EL expression for attribute value
166 */
167 public void setStyle(String value)
168 {
169 styleExpr = value;
170 }
171
172 /**
173 * @see org.displaytag.tags.TableTag#setSummary(java.lang.String)
174 * @param value EL expression for attribute value
175 */
176 public void setSummary(String value)
177 {
178 summaryExpr = value;
179 }
180
181 /**
182 * @see org.displaytag.tags.TableTag#setCellspacing(java.lang.String)
183 * @param value EL expression for attribute value
184 */
185 public void setCellspacing(String value)
186 {
187 cellspacingExpr = value;
188 }
189
190 /**
191 * @see org.displaytag.tags.TableTag#setClass(java.lang.String)
192 * @param value EL expression for attribute value
193 */
194 public void setClass(String value)
195 {
196 classExpr = value;
197 }
198
199 /**
200 * @see org.displaytag.tags.TableTag#setDecorator(java.lang.String)
201 * @param value EL expression for attribute value
202 */
203 public void setDecorator(String value)
204 {
205 decoratorExpr = value;
206 }
207
208 /**
209 * @see org.displaytag.tags.TableTag#setDefaultsort(int)
210 * @param value EL expression for attribute value
211 */
212 public void setDefaultsort(String value)
213 {
214 defaultsortExpr = value;
215 }
216
217 /**
218 * @see org.displaytag.tags.TableTag#setDefaultorder(java.lang.String)
219 * @param value EL expression for attribute value
220 */
221 public void setDefaultorder(String value)
222 {
223 defaultorderExpr = value;
224 }
225
226 /**
227 * @see org.displaytag.tags.TableTag#setExport(boolean)
228 * @param value EL expression for attribute value
229 */
230 public void setExport(String value)
231 {
232 exportExpr = value;
233 }
234
235 /**
236 * @see org.displaytag.tags.TableTag#setFrame(java.lang.String)
237 * @param value EL expression for attribute value
238 */
239 public void setFrame(String value)
240 {
241 frameExpr = value;
242 }
243
244 /**
245 * @see org.displaytag.tags.TableTag#setLength(int)
246 * @param value EL expression for attribute value
247 */
248 public void setLength(String value)
249 {
250 lengthExpr = value;
251 }
252
253 /**
254 * @see org.displaytag.tags.TableTag#setName(java.lang.Object)
255 * @param value EL expression for attribute value
256 */
257 public void setName(String value)
258 {
259 nameExpr = value;
260 }
261
262 /**
263 * @see org.displaytag.tags.TableTag#setOffset(int)
264 * @param value EL expression for attribute value
265 */
266 public void setOffset(String value)
267 {
268 offsetExpr = value;
269 }
270
271 /**
272 * @see org.displaytag.tags.TableTag#setPagesize(int)
273 * @param value EL expression for attribute value
274 */
275 public void setPagesize(String value)
276 {
277 pagesizeExpr = value;
278 }
279
280 /**
281 * @see org.displaytag.tags.TableTag#setRequestURI(java.lang.String)
282 * @param value EL expression for attribute value
283 */
284 public void setRequestURI(String value)
285 {
286 requestURIExpr = value;
287 }
288
289 /**
290 * @see org.displaytag.tags.TableTag#setRequestURIcontext(boolean)
291 * @param value EL expression for attribute value
292 */
293 public void setRequestURIcontext(String value)
294 {
295 requestURIcontextExpr = value;
296 }
297
298 /**
299 * @see org.displaytag.tags.TableTag#setRules(java.lang.String)
300 * @param value EL expression for attribute value
301 */
302 public void setRules(String value)
303 {
304 rulesExpr = value;
305 }
306
307 /**
308 * @param value EL expression for attribute value
309 * @see org.displaytag.tags.TableTag#setSize(java.lang.String)
310 */
311 public void setSize(String value)
312 {
313 sizeExpr = value;
314 }
315
316 /**
317 * @see org.displaytag.tags.TableTag#setSort(java.lang.String)
318 * @param value EL expression for attribute value
319 */
320 public void setSort(String value)
321 {
322 sortExpr = value;
323 }
324
325 /**
326 * @see org.displaytag.tags.TableTag#setExcludedParams(java.lang.String)
327 * @param value EL expression for attribute value
328 */
329 public void setExcludedParams(String value)
330 {
331 excludedParamsExpr = value;
332 }
333
334 /**
335 * @see org.displaytag.tags.TableTag#setHtmlId(java.lang.String)
336 * @param value EL expression for attribute value
337 */
338 public void setHtmlId(String value)
339 {
340 htmlIdExpr = value;
341 }
342
343 /**
344 * @see javax.servlet.jsp.tagext.Tag#doStartTag()
345 */
346 public int doStartTag() throws JspException
347 {
348 evaluateExpressions();
349 return super.doStartTag();
350 }
351
352 /**
353 * Evaluates EL expressions and sets values in the parent Table Tag.
354 * @throws JspException for errors during evaluation
355 */
356 private void evaluateExpressions() throws JspException
357 {
358 ExpressionEvaluator eval = new ExpressionEvaluator(this, pageContext);
359
360 if (idExpr != null)
361 {
362 super.setUid(eval.evalString("uid", idExpr)); //$NON-NLS-1$
363 }
364 if (htmlIdExpr != null)
365 {
366 super.setHtmlId(eval.evalString("htmlId", htmlIdExpr)); //$NON-NLS-1$
367 }
368 if (cellpaddingExpr != null)
369 {
370 super.setCellpadding(eval.evalString("cellpadding", cellpaddingExpr)); //$NON-NLS-1$
371 }
372 if (cellspacingExpr != null)
373 {
374 super.setCellspacing(eval.evalString("cellspacing", cellspacingExpr)); //$NON-NLS-1$
375 }
376 if (classExpr != null)
377 {
378 super.setClass(eval.evalString("class", classExpr)); //$NON-NLS-1$
379 }
380 if (decoratorExpr != null)
381 {
382 super.setDecorator(eval.evalString("decorator", decoratorExpr)); //$NON-NLS-1$
383 }
384 if (defaultorderExpr != null)
385 {
386 super.setDefaultorder(eval.evalString("defaultorder", defaultorderExpr)); //$NON-NLS-1$
387 }
388 if (excludedParamsExpr != null)
389 {
390 super.setExcludedParams(eval.evalString("excludedParams", excludedParamsExpr)); //$NON-NLS-1$
391 }
392 if (defaultsortExpr != null)
393 {
394 super.setDefaultsort(eval.evalInt("defaultsort", defaultsortExpr)); //$NON-NLS-1$
395 }
396 if (exportExpr != null)
397 {
398 super.setExport(eval.evalBoolean("export", exportExpr)); //$NON-NLS-1$
399 }
400 if (frameExpr != null)
401 {
402 super.setFrame(eval.evalString("frame", frameExpr)); //$NON-NLS-1$
403 }
404 if (lengthExpr != null)
405 {
406 super.setLength(eval.evalInt("length", lengthExpr)); //$NON-NLS-1$
407 }
408 if (nameExpr != null)
409 {
410 Object source = eval.eval("name", nameExpr, Object.class); //$NON-NLS-1$
411
412 // be more user-friendly: accept both EL and legacy expressions
413 if (source instanceof String)
414 {
415 super.setNameString((String) source);
416 }
417 else
418 {
419 // evaluate name only once, so assign it to "list"
420 super.list = source;
421 }
422 }
423 if (offsetExpr != null)
424 {
425 super.setOffset(eval.evalInt("offset", offsetExpr)); //$NON-NLS-1$
426 }
427 if (pagesizeExpr != null)
428 {
429 super.setPagesize(eval.evalInt("pagesize", pagesizeExpr)); //$NON-NLS-1$
430 }
431 if (partialListExpr != null)
432 {
433 super.setPartialList(eval.evalBoolean("partialList", partialListExpr)); //$NON-NLS-1$
434 }
435 if (requestURIExpr != null)
436 {
437 super.setRequestURI(eval.evalString("requestURI", requestURIExpr)); //$NON-NLS-1$
438 }
439 if (requestURIcontextExpr != null)
440 {
441 super.setRequestURIcontext(eval.evalBoolean("requestURIcontext", requestURIcontextExpr)); //$NON-NLS-1$
442 }
443 if (rulesExpr != null)
444 {
445 super.setRules(eval.evalString("rules", rulesExpr)); //$NON-NLS-1$
446 }
447 if (sizeExpr != null)
448 {
449 Object source = eval.eval("size", sizeExpr, Object.class); //$NON-NLS-1$
450
451 // be more user-friendly: accept both EL and legacy expressions
452 if (source instanceof String)
453 {
454 super.setSizeObjectName((String) source);
455 }
456 else
457 {
458 // evaluate size only once, so assign it to the "size" object
459 super.setSize(source);
460 }
461 }
462 if (sortExpr != null)
463 {
464 super.setSort(eval.evalString("sort", sortExpr)); //$NON-NLS-1$
465 }
466 if (styleExpr != null)
467 {
468 super.setStyle(eval.evalString("style", styleExpr)); //$NON-NLS-1$
469 }
470 if (summaryExpr != null)
471 {
472 super.setSummary(eval.evalString("summary", summaryExpr)); //$NON-NLS-1$
473 }
474 }
475
476 /**
477 * @see javax.servlet.jsp.tagext.Tag#release()
478 */
479 public void release()
480 {
481 super.release();
482 this.cellpaddingExpr = null;
483 this.cellspacingExpr = null;
484 this.classExpr = null;
485 this.decoratorExpr = null;
486 this.defaultorderExpr = null;
487 this.defaultsortExpr = null;
488 this.exportExpr = null;
489 this.frameExpr = null;
490 this.lengthExpr = null;
491 this.nameExpr = null;
492 this.offsetExpr = null;
493 this.pagesizeExpr = null;
494 this.partialListExpr = null;
495 this.requestURIExpr = null;
496 this.requestURIcontextExpr = null;
497 this.rulesExpr = null;
498 this.sizeExpr = null;
499 this.sortExpr = null;
500 this.styleExpr = null;
501 this.summaryExpr = null;
502 this.excludedParamsExpr = null;
503 this.idExpr = null;
504 this.htmlIdExpr = null;
505 }
506
507 }
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