1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.jasper.compiler;
19
20 import java.io.FileInputStream;
21 import java.io.FileNotFoundException;
22 import java.io.InputStream;
23 import java.io.PrintWriter;
24 import java.io.StringWriter;
25 import java.net.JarURLConnection;
26 import java.net.URL;
27 import java.util.Collection;
28 import java.util.Enumeration;
29 import java.util.Hashtable;
30 import java.util.Iterator;
31 import java.util.Map;
32 import java.util.Vector;
33 import java.util.jar.JarFile;
34 import java.util.zip.ZipEntry;
35
36 import javax.servlet.jsp.tagext.FunctionInfo;
37 import javax.servlet.jsp.tagext.PageData;
38 import javax.servlet.jsp.tagext.TagAttributeInfo;
39 import javax.servlet.jsp.tagext.TagExtraInfo;
40 import javax.servlet.jsp.tagext.TagFileInfo;
41 import javax.servlet.jsp.tagext.TagInfo;
42 import javax.servlet.jsp.tagext.TagLibraryInfo;
43 import javax.servlet.jsp.tagext.TagLibraryValidator;
44 import javax.servlet.jsp.tagext.TagVariableInfo;
45 import javax.servlet.jsp.tagext.ValidationMessage;
46 import javax.servlet.jsp.tagext.VariableInfo;
47
48 import org.apache.jasper.JasperException;
49 import org.apache.jasper.JspCompilationContext;
50 import org.apache.jasper.xmlparser.ParserUtils;
51 import org.apache.jasper.xmlparser.TreeNode;
52 import org.apache.juli.logging.Log;
53 import org.apache.juli.logging.LogFactory;
54
55 /**
56 * Implementation of the TagLibraryInfo class from the JSP spec.
57 *
58 * @author Anil K. Vijendran
59 * @author Mandar Raje
60 * @author Pierre Delisle
61 * @author Kin-man Chung
62 * @author Jan Luehe
63 */
64 class TagLibraryInfoImpl extends TagLibraryInfo implements TagConstants {
65
66 // Logger
67 private Log log = LogFactory.getLog(TagLibraryInfoImpl.class);
68
69 private JspCompilationContext ctxt;
70
71 private PageInfo pi;
72
73 private ErrorDispatcher err;
74
75 private ParserController parserController;
76
77 private final void print(String name, String value, PrintWriter w) {
78 if (value != null) {
79 w.print(name + " = {\n\t");
80 w.print(value);
81 w.print("\n}\n");
82 }
83 }
84
85 public String toString() {
86 StringWriter sw = new StringWriter();
87 PrintWriter out = new PrintWriter(sw);
88 print("tlibversion", tlibversion, out);
89 print("jspversion", jspversion, out);
90 print("shortname", shortname, out);
91 print("urn", urn, out);
92 print("info", info, out);
93 print("uri", uri, out);
94 print("tagLibraryValidator", "" + tagLibraryValidator, out);
95
96 for (int i = 0; i < tags.length; i++)
97 out.println(tags[i].toString());
98
99 for (int i = 0; i < tagFiles.length; i++)
100 out.println(tagFiles[i].toString());
101
102 for (int i = 0; i < functions.length; i++)
103 out.println(functions[i].toString());
104
105 return sw.toString();
106 }
107
108 // XXX FIXME
109 // resolveRelativeUri and/or getResourceAsStream don't seem to properly
110 // handle relative paths when dealing when home and getDocBase are set
111 // the following is a workaround until these problems are resolved.
112 private InputStream getResourceAsStream(String uri)
113 throws FileNotFoundException {
114 try {
115 // see if file exists on the filesystem first
116 String real = ctxt.getRealPath(uri);
117 if (real == null) {
118 return ctxt.getResourceAsStream(uri);
119 } else {
120 return new FileInputStream(real);
121 }
122 } catch (FileNotFoundException ex) {
123 // if file not found on filesystem, get the resource through
124 // the context
125 return ctxt.getResourceAsStream(uri);
126 }
127
128 }
129
130 /**
131 * Constructor.
132 */
133 public TagLibraryInfoImpl(JspCompilationContext ctxt, ParserController pc, PageInfo pi,
134 String prefix, String uriIn, String[] location, ErrorDispatcher err)
135 throws JasperException {
136 super(prefix, uriIn);
137
138 this.ctxt = ctxt;
139 this.parserController = pc;
140 this.pi = pi;
141 this.err = err;
142 InputStream in = null;
143 JarFile jarFile = null;
144
145 if (location == null) {
146 // The URI points to the TLD itself or to a JAR file in which the
147 // TLD is stored
148 location = generateTLDLocation(uri, ctxt);
149 }
150
151 try {
152 if (!location[0].endsWith("jar")) {
153 // Location points to TLD file
154 try {
155 in = getResourceAsStream(location[0]);
156 if (in == null) {
157 throw new FileNotFoundException(location[0]);
158 }
159 } catch (FileNotFoundException ex) {
160 err.jspError("jsp.error.file.not.found", location[0]);
161 }
162
163 parseTLD(ctxt, location[0], in, null);
164 // Add TLD to dependency list
165 PageInfo pageInfo = ctxt.createCompiler().getPageInfo();
166 if (pageInfo != null) {
167 pageInfo.addDependant(location[0]);
168 }
169 } else {
170 // Tag library is packaged in JAR file
171 try {
172 URL jarFileUrl = new URL("jar:" + location[0] + "!/");
173 JarURLConnection conn = (JarURLConnection) jarFileUrl
174 .openConnection();
175 conn.setUseCaches(false);
176 conn.connect();
177 jarFile = conn.getJarFile();
178 ZipEntry jarEntry = jarFile.getEntry(location[1]);
179 in = jarFile.getInputStream(jarEntry);
180 parseTLD(ctxt, location[0], in, jarFileUrl);
181 } catch (Exception ex) {
182 err.jspError("jsp.error.tld.unable_to_read", location[0],
183 location[1], ex.toString());
184 }
185 }
186 } finally {
187 if (in != null) {
188 try {
189 in.close();
190 } catch (Throwable t) {
191 }
192 }
193 if (jarFile != null) {
194 try {
195 jarFile.close();
196 } catch (Throwable t) {
197 }
198 }
199 }
200
201 }
202
203 public TagLibraryInfo[] getTagLibraryInfos() {
204 Collection coll = pi.getTaglibs();
205 return (TagLibraryInfo[]) coll.toArray(new TagLibraryInfo[0]);
206 }
207
208 /*
209 * @param ctxt The JSP compilation context @param uri The TLD's uri @param
210 * in The TLD's input stream @param jarFileUrl The JAR file containing the
211 * TLD, or null if the tag library is not packaged in a JAR
212 */
213 private void parseTLD(JspCompilationContext ctxt, String uri,
214 InputStream in, URL jarFileUrl) throws JasperException {
215 Vector tagVector = new Vector();
216 Vector tagFileVector = new Vector();
217 Hashtable functionTable = new Hashtable();
218
219 // Create an iterator over the child elements of our <taglib> element
220 ParserUtils pu = new ParserUtils();
221 TreeNode tld = pu.parseXMLDocument(uri, in);
222
223 // Check to see if the <taglib> root element contains a 'version'
224 // attribute, which was added in JSP 2.0 to replace the <jsp-version>
225 // subelement
226 this.jspversion = tld.findAttribute("version");
227
228 // Process each child element of our <taglib> element
229 Iterator list = tld.findChildren();
230
231 while (list.hasNext()) {
232 TreeNode element = (TreeNode) list.next();
233 String tname = element.getName();
234
235 if ("tlibversion".equals(tname) // JSP 1.1
236 || "tlib-version".equals(tname)) { // JSP 1.2
237 this.tlibversion = element.getBody();
238 } else if ("jspversion".equals(tname)
239 || "jsp-version".equals(tname)) {
240 this.jspversion = element.getBody();
241 } else if ("shortname".equals(tname) || "short-name".equals(tname))
242 this.shortname = element.getBody();
243 else if ("uri".equals(tname))
244 this.urn = element.getBody();
245 else if ("info".equals(tname) || "description".equals(tname))
246 this.info = element.getBody();
247 else if ("validator".equals(tname))
248 this.tagLibraryValidator = createValidator(element);
249 else if ("tag".equals(tname))
250 tagVector.addElement(createTagInfo(element, jspversion));
251 else if ("tag-file".equals(tname)) {
252 TagFileInfo tagFileInfo = createTagFileInfo(element, uri,
253 jarFileUrl);
254 tagFileVector.addElement(tagFileInfo);
255 } else if ("function".equals(tname)) { // JSP2.0
256 FunctionInfo funcInfo = createFunctionInfo(element);
257 String funcName = funcInfo.getName();
258 if (functionTable.containsKey(funcName)) {
259 err.jspError("jsp.error.tld.fn.duplicate.name", funcName,
260 uri);
261
262 }
263 functionTable.put(funcName, funcInfo);
264 } else if ("display-name".equals(tname) || // Ignored elements
265 "small-icon".equals(tname) || "large-icon".equals(tname)
266 || "listener".equals(tname)) {
267 ;
268 } else if ("taglib-extension".equals(tname)) {
269 // Recognized but ignored
270 } else {
271 if (log.isWarnEnabled()) {
272 log.warn(Localizer.getMessage(
273 "jsp.warning.unknown.element.in.taglib", tname));
274 }
275 }
276
277 }
278
279 if (tlibversion == null) {
280 err.jspError("jsp.error.tld.mandatory.element.missing",
281 "tlib-version");
282 }
283 if (jspversion == null) {
284 err.jspError("jsp.error.tld.mandatory.element.missing",
285 "jsp-version");
286 }
287
288 this.tags = new TagInfo[tagVector.size()];
289 tagVector.copyInto(this.tags);
290
291 this.tagFiles = new TagFileInfo[tagFileVector.size()];
292 tagFileVector.copyInto(this.tagFiles);
293
294 this.functions = new FunctionInfo[functionTable.size()];
295 int i = 0;
296 Enumeration enumeration = functionTable.elements();
297 while (enumeration.hasMoreElements()) {
298 this.functions[i++] = (FunctionInfo) enumeration.nextElement();
299 }
300 }
301
302 /*
303 * @param uri The uri of the TLD @param ctxt The compilation context
304 *
305 * @return String array whose first element denotes the path to the TLD. If
306 * the path to the TLD points to a jar file, then the second element denotes
307 * the name of the TLD entry in the jar file, which is hardcoded to
308 * META-INF/taglib.tld.
309 */
310 private String[] generateTLDLocation(String uri, JspCompilationContext ctxt)
311 throws JasperException {
312
313 int uriType = TldLocationsCache.uriType(uri);
314 if (uriType == TldLocationsCache.ABS_URI) {
315 err.jspError("jsp.error.taglibDirective.absUriCannotBeResolved",
316 uri);
317 } else if (uriType == TldLocationsCache.NOROOT_REL_URI) {
318 uri = ctxt.resolveRelativeUri(uri);
319 }
320
321 String[] location = new String[2];
322 location[0] = uri;
323 if (location[0].endsWith("jar")) {
324 URL url = null;
325 try {
326 url = ctxt.getResource(location[0]);
327 } catch (Exception ex) {
328 err.jspError("jsp.error.tld.unable_to_get_jar", location[0], ex
329 .toString());
330 }
331 if (url == null) {
332 err.jspError("jsp.error.tld.missing_jar", location[0]);
333 }
334 location[0] = url.toString();
335 location[1] = "META-INF/taglib.tld";
336 }
337
338 return location;
339 }
340
341 private TagInfo createTagInfo(TreeNode elem, String jspVersion)
342 throws JasperException {
343
344 String tagName = null;
345 String tagClassName = null;
346 String teiClassName = null;
347
348 /*
349 * Default body content for JSP 1.2 tag handlers (<body-content> has
350 * become mandatory in JSP 2.0, because the default would be invalid for
351 * simple tag handlers)
352 */
353 String bodycontent = "JSP";
354
355 String info = null;
356 String displayName = null;
357 String smallIcon = null;
358 String largeIcon = null;
359 boolean dynamicAttributes = false;
360
361 Vector attributeVector = new Vector();
362 Vector variableVector = new Vector();
363 Iterator list = elem.findChildren();
364 while (list.hasNext()) {
365 TreeNode element = (TreeNode) list.next();
366 String tname = element.getName();
367
368 if ("name".equals(tname)) {
369 tagName = element.getBody();
370 } else if ("tagclass".equals(tname) || "tag-class".equals(tname)) {
371 tagClassName = element.getBody();
372 } else if ("teiclass".equals(tname) || "tei-class".equals(tname)) {
373 teiClassName = element.getBody();
374 } else if ("bodycontent".equals(tname)
375 || "body-content".equals(tname)) {
376 bodycontent = element.getBody();
377 } else if ("display-name".equals(tname)) {
378 displayName = element.getBody();
379 } else if ("small-icon".equals(tname)) {
380 smallIcon = element.getBody();
381 } else if ("large-icon".equals(tname)) {
382 largeIcon = element.getBody();
383 } else if ("icon".equals(tname)) {
384 TreeNode icon = element.findChild("small-icon");
385 if (icon != null) {
386 smallIcon = icon.getBody();
387 }
388 icon = element.findChild("large-icon");
389 if (icon != null) {
390 largeIcon = icon.getBody();
391 }
392 } else if ("info".equals(tname) || "description".equals(tname)) {
393 info = element.getBody();
394 } else if ("variable".equals(tname)) {
395 variableVector.addElement(createVariable(element));
396 } else if ("attribute".equals(tname)) {
397 attributeVector
398 .addElement(createAttribute(element, jspVersion));
399 } else if ("dynamic-attributes".equals(tname)) {
400 dynamicAttributes = JspUtil.booleanValue(element.getBody());
401 } else if ("example".equals(tname)) {
402 // Ignored elements
403 } else if ("tag-extension".equals(tname)) {
404 // Ignored
405 } else {
406 if (log.isWarnEnabled()) {
407 log.warn(Localizer.getMessage(
408 "jsp.warning.unknown.element.in.tag", tname));
409 }
410 }
411 }
412
413 TagExtraInfo tei = null;
414 if (teiClassName != null && !teiClassName.equals("")) {
415 try {
416 Class teiClass = ctxt.getClassLoader().loadClass(teiClassName);
417 tei = (TagExtraInfo) teiClass.newInstance();
418 } catch (Exception e) {
419 err.jspError("jsp.error.teiclass.instantiation", teiClassName,
420 e);
421 }
422 }
423
424 TagAttributeInfo[] tagAttributeInfo = new TagAttributeInfo[attributeVector
425 .size()];
426 attributeVector.copyInto(tagAttributeInfo);
427
428 TagVariableInfo[] tagVariableInfos = new TagVariableInfo[variableVector
429 .size()];
430 variableVector.copyInto(tagVariableInfos);
431
432 TagInfo taginfo = new TagInfo(tagName, tagClassName, bodycontent, info,
433 this, tei, tagAttributeInfo, displayName, smallIcon, largeIcon,
434 tagVariableInfos, dynamicAttributes);
435 return taginfo;
436 }
437
438 /*
439 * Parses the tag file directives of the given TagFile and turns them into a
440 * TagInfo.
441 *
442 * @param elem The <tag-file> element in the TLD @param uri The location of
443 * the TLD, in case the tag file is specified relative to it @param jarFile
444 * The JAR file, in case the tag file is packaged in a JAR
445 *
446 * @return TagInfo correspoding to tag file directives
447 */
448 private TagFileInfo createTagFileInfo(TreeNode elem, String uri,
449 URL jarFileUrl) throws JasperException {
450
451 String name = null;
452 String path = null;
453
454 Iterator list = elem.findChildren();
455 while (list.hasNext()) {
456 TreeNode child = (TreeNode) list.next();
457 String tname = child.getName();
458 if ("name".equals(tname)) {
459 name = child.getBody();
460 } else if ("path".equals(tname)) {
461 path = child.getBody();
462 } else if ("example".equals(tname)) {
463 // Ignore <example> element: Bugzilla 33538
464 } else if ("tag-extension".equals(tname)) {
465 // Ignore <tag-extension> element: Bugzilla 33538
466 } else if ("icon".equals(tname)
467 || "display-name".equals(tname)
468 || "description".equals(tname)) {
469 // Ignore these elements: Bugzilla 38015
470 } else {
471 if (log.isWarnEnabled()) {
472 log.warn(Localizer.getMessage(
473 "jsp.warning.unknown.element.in.tagfile", tname));
474 }
475 }
476 }
477
478 if (path.startsWith("/META-INF/tags")) {
479 // Tag file packaged in JAR
480 ctxt.setTagFileJarUrl(path, jarFileUrl);
481 } else if (!path.startsWith("/WEB-INF/tags")) {
482 err.jspError("jsp.error.tagfile.illegalPath", path);
483 }
484
485 TagInfo tagInfo = TagFileProcessor.parseTagFileDirectives(
486 parserController, name, path, this);
487 return new TagFileInfo(name, path, tagInfo);
488 }
489
490 TagAttributeInfo createAttribute(TreeNode elem, String jspVersion) {
491 String name = null;
492 String type = null;
493 String expectedType = null;
494 String methodSignature = null;
495 boolean required = false, rtexprvalue = false, reqTime = false, isFragment = false, deferredValue = false, deferredMethod = false;
496
497 Iterator list = elem.findChildren();
498 while (list.hasNext()) {
499 TreeNode element = (TreeNode) list.next();
500 String tname = element.getName();
501
502 if ("name".equals(tname)) {
503 name = element.getBody();
504 } else if ("required".equals(tname)) {
505 String s = element.getBody();
506 if (s != null)
507 required = JspUtil.booleanValue(s);
508 } else if ("rtexprvalue".equals(tname)) {
509 String s = element.getBody();
510 if (s != null)
511 rtexprvalue = JspUtil.booleanValue(s);
512 } else if ("type".equals(tname)) {
513 type = element.getBody();
514 if ("1.2".equals(jspVersion)
515 && (type.equals("Boolean") || type.equals("Byte")
516 || type.equals("Character")
517 || type.equals("Double")
518 || type.equals("Float")
519 || type.equals("Integer")
520 || type.equals("Long") || type.equals("Object")
521 || type.equals("Short") || type
522 .equals("String"))) {
523 type = "java.lang." + type;
524 }
525 } else if ("fragment".equals(tname)) {
526 String s = element.getBody();
527 if (s != null) {
528 isFragment = JspUtil.booleanValue(s);
529 }
530 } else if ("deferred-value".equals(tname)) {
531 deferredValue = true;
532 type = "javax.el.ValueExpression";
533 TreeNode child = element.findChild("type");
534 if (child != null) {
535 expectedType = child.getBody();
536 if (expectedType != null) {
537 expectedType = expectedType.trim();
538 }
539 } else {
540 expectedType = "java.lang.Object";
541 }
542 } else if ("deferred-method".equals(tname)) {
543 deferredMethod = true;
544 type = "javax.el.MethodExpression";
545 TreeNode child = element.findChild("method-signature");
546 if (child != null) {
547 methodSignature = child.getBody();
548 if (methodSignature != null) {
549 methodSignature = methodSignature.trim();
550 }
551 } else {
552 methodSignature = "java.lang.Object method()";
553 }
554 } else if ("description".equals(tname) || // Ignored elements
555 false) {
556 ;
557 } else {
558 if (log.isWarnEnabled()) {
559 log.warn(Localizer.getMessage(
560 "jsp.warning.unknown.element.in.attribute", tname));
561 }
562 }
563 }
564
565 if (isFragment) {
566 /*
567 * According to JSP.C-3 ("TLD Schema Element Structure - tag"),
568 * 'type' and 'rtexprvalue' must not be specified if 'fragment' has
569 * been specified (this will be enforced by validating parser).
570 * Also, if 'fragment' is TRUE, 'type' is fixed at
571 * javax.servlet.jsp.tagext.JspFragment, and 'rtexprvalue' is fixed
572 * at true. See also JSP.8.5.2.
573 */
574 type = "javax.servlet.jsp.tagext.JspFragment";
575 rtexprvalue = true;
576 }
577
578 if (!rtexprvalue && type == null) {
579 // According to JSP spec, for static values (those determined at
580 // translation time) the type is fixed at java.lang.String.
581 type = "java.lang.String";
582 }
583
584 return new TagAttributeInfo(name, required, type, rtexprvalue,
585 isFragment, null, deferredValue, deferredMethod, expectedType,
586 methodSignature);
587 }
588
589 TagVariableInfo createVariable(TreeNode elem) {
590 String nameGiven = null;
591 String nameFromAttribute = null;
592 String className = "java.lang.String";
593 boolean declare = true;
594 int scope = VariableInfo.NESTED;
595
596 Iterator list = elem.findChildren();
597 while (list.hasNext()) {
598 TreeNode element = (TreeNode) list.next();
599 String tname = element.getName();
600 if ("name-given".equals(tname))
601 nameGiven = element.getBody();
602 else if ("name-from-attribute".equals(tname))
603 nameFromAttribute = element.getBody();
604 else if ("variable-class".equals(tname))
605 className = element.getBody();
606 else if ("declare".equals(tname)) {
607 String s = element.getBody();
608 if (s != null)
609 declare = JspUtil.booleanValue(s);
610 } else if ("scope".equals(tname)) {
611 String s = element.getBody();
612 if (s != null) {
613 if ("NESTED".equals(s)) {
614 scope = VariableInfo.NESTED;
615 } else if ("AT_BEGIN".equals(s)) {
616 scope = VariableInfo.AT_BEGIN;
617 } else if ("AT_END".equals(s)) {
618 scope = VariableInfo.AT_END;
619 }
620 }
621 } else if ("description".equals(tname) || // Ignored elements
622 false) {
623 } else {
624 if (log.isWarnEnabled()) {
625 log.warn(Localizer.getMessage(
626 "jsp.warning.unknown.element.in.variable", tname));
627 }
628 }
629 }
630 return new TagVariableInfo(nameGiven, nameFromAttribute, className,
631 declare, scope);
632 }
633
634 private TagLibraryValidator createValidator(TreeNode elem)
635 throws JasperException {
636
637 String validatorClass = null;
638 Map initParams = new Hashtable();
639
640 Iterator list = elem.findChildren();
641 while (list.hasNext()) {
642 TreeNode element = (TreeNode) list.next();
643 String tname = element.getName();
644 if ("validator-class".equals(tname))
645 validatorClass = element.getBody();
646 else if ("init-param".equals(tname)) {
647 String[] initParam = createInitParam(element);
648 initParams.put(initParam[0], initParam[1]);
649 } else if ("description".equals(tname) || // Ignored elements
650 false) {
651 } else {
652 if (log.isWarnEnabled()) {
653 log.warn(Localizer.getMessage(
654 "jsp.warning.unknown.element.in.validator", tname));
655 }
656 }
657 }
658
659 TagLibraryValidator tlv = null;
660 if (validatorClass != null && !validatorClass.equals("")) {
661 try {
662 Class tlvClass = ctxt.getClassLoader()
663 .loadClass(validatorClass);
664 tlv = (TagLibraryValidator) tlvClass.newInstance();
665 } catch (Exception e) {
666 err.jspError("jsp.error.tlvclass.instantiation",
667 validatorClass, e);
668 }
669 }
670 if (tlv != null) {
671 tlv.setInitParameters(initParams);
672 }
673 return tlv;
674 }
675
676 String[] createInitParam(TreeNode elem) {
677 String[] initParam = new String[2];
678
679 Iterator list = elem.findChildren();
680 while (list.hasNext()) {
681 TreeNode element = (TreeNode) list.next();
682 String tname = element.getName();
683 if ("param-name".equals(tname)) {
684 initParam[0] = element.getBody();
685 } else if ("param-value".equals(tname)) {
686 initParam[1] = element.getBody();
687 } else if ("description".equals(tname)) {
688 ; // Do nothing
689 } else {
690 if (log.isWarnEnabled()) {
691 log.warn(Localizer.getMessage(
692 "jsp.warning.unknown.element.in.initParam", tname));
693 }
694 }
695 }
696 return initParam;
697 }
698
699 FunctionInfo createFunctionInfo(TreeNode elem) {
700
701 String name = null;
702 String klass = null;
703 String signature = null;
704
705 Iterator list = elem.findChildren();
706 while (list.hasNext()) {
707 TreeNode element = (TreeNode) list.next();
708 String tname = element.getName();
709
710 if ("name".equals(tname)) {
711 name = element.getBody();
712 } else if ("function-class".equals(tname)) {
713 klass = element.getBody();
714 } else if ("function-signature".equals(tname)) {
715 signature = element.getBody();
716 } else if ("display-name".equals(tname) || // Ignored elements
717 "small-icon".equals(tname) || "large-icon".equals(tname)
718 || "description".equals(tname) || "example".equals(tname)) {
719 } else {
720 if (log.isWarnEnabled()) {
721 log.warn(Localizer.getMessage(
722 "jsp.warning.unknown.element.in.function", tname));
723 }
724 }
725 }
726
727 return new FunctionInfo(name, klass, signature);
728 }
729
730 // *********************************************************************
731 // Until javax.servlet.jsp.tagext.TagLibraryInfo is fixed
732
733 /**
734 * The instance (if any) for the TagLibraryValidator class.
735 *
736 * @return The TagLibraryValidator instance, if any.
737 */
738 public TagLibraryValidator getTagLibraryValidator() {
739 return tagLibraryValidator;
740 }
741
742 /**
743 * Translation-time validation of the XML document associated with the JSP
744 * page. This is a convenience method on the associated TagLibraryValidator
745 * class.
746 *
747 * @param thePage
748 * The JSP page object
749 * @return A string indicating whether the page is valid or not.
750 */
751 public ValidationMessage[] validate(PageData thePage) {
752 TagLibraryValidator tlv = getTagLibraryValidator();
753 if (tlv == null)
754 return null;
755
756 String uri = getURI();
757 if (uri.startsWith("/")) {
758 uri = URN_JSPTLD + uri;
759 }
760
761 return tlv.validate(getPrefixString(), uri, thePage);
762 }
763
764 protected TagLibraryValidator tagLibraryValidator;
765 }
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