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comparison: src/share/classes/com/sun/tools/doclint/Checker.java

src/share/classes/com/sun/tools/doclint/Checker.java

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1 /*
2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.doclint;
27
28 import java.io.IOException;
29 import java.io.StringWriter;
30 import java.net.URI;
31 import java.net.URISyntaxException;
32 import java.util.Deque;
33 import java.util.EnumSet;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.LinkedList;
37 import java.util.List;
38 import java.util.Map;
39 import java.util.Set;
40 import java.util.regex.Matcher;
41 import java.util.regex.Pattern;
42
43 import javax.lang.model.element.Element;
44 import javax.lang.model.element.ElementKind;
45 import javax.lang.model.element.ExecutableElement;
46 import javax.lang.model.element.Name;
47 import javax.lang.model.element.VariableElement;
48 import javax.lang.model.type.TypeKind;
49 import javax.lang.model.type.TypeMirror;
50 import javax.tools.Diagnostic.Kind;
51 import javax.tools.JavaFileObject;
52
53 import com.sun.source.doctree.AttributeTree;
54 import com.sun.source.doctree.AuthorTree;
55 import com.sun.source.doctree.DocCommentTree;
56 import com.sun.source.doctree.DocRootTree;
57 import com.sun.source.doctree.DocTree;
58 import com.sun.source.doctree.EndElementTree;
59 import com.sun.source.doctree.EntityTree;
60 import com.sun.source.doctree.ErroneousTree;
61 import com.sun.source.doctree.IdentifierTree;
62 import com.sun.source.doctree.InheritDocTree;
63 import com.sun.source.doctree.LinkTree;
64 import com.sun.source.doctree.LiteralTree;
65 import com.sun.source.doctree.ParamTree;
66 import com.sun.source.doctree.ReferenceTree;
67 import com.sun.source.doctree.ReturnTree;
68 import com.sun.source.doctree.SerialDataTree;
69 import com.sun.source.doctree.SerialFieldTree;
70 import com.sun.source.doctree.SinceTree;
71 import com.sun.source.doctree.StartElementTree;
72 import com.sun.source.doctree.TextTree;
73 import com.sun.source.doctree.ThrowsTree;
74 import com.sun.source.doctree.UnknownBlockTagTree;
75 import com.sun.source.doctree.UnknownInlineTagTree;
76 import com.sun.source.doctree.ValueTree;
77 import com.sun.source.doctree.VersionTree;
78 import com.sun.source.util.DocTreePath;
79 import com.sun.source.util.DocTreePathScanner;
80 import com.sun.source.util.TreePath;
81 import com.sun.tools.doclint.HtmlTag.AttrKind;
82 import com.sun.tools.javac.tree.DocPretty;
83 import com.sun.tools.javac.util.StringUtils;
84 import static com.sun.tools.doclint.Messages.Group.*;
85
86
87 /**
88 * Validate a doc comment.
89 *
90 * <p><b>This is NOT part of any supported API.
91 * If you write code that depends on this, you do so at your own
92 * risk. This code and its internal interfaces are subject to change
93 * or deletion without notice.</b></p>
94 */
95 public class Checker extends DocTreePathScanner<Void, Void> {
96 final Env env;
97
98 Set<Element> foundParams = new HashSet<>();
99 Set<TypeMirror> foundThrows = new HashSet<>();
100 Map<Element, Set<String>> foundAnchors = new HashMap<>();
101 boolean foundInheritDoc = false;
102 boolean foundReturn = false;
103
104 public enum Flag {
105 TABLE_HAS_CAPTION,
106 HAS_ELEMENT,
107 HAS_INLINE_TAG,
108 HAS_TEXT,
109 REPORTED_BAD_INLINE
110 }
111
112 static class TagStackItem {
113 final DocTree tree; // typically, but not always, StartElementTree
114 final HtmlTag tag;
115 final Set<HtmlTag.Attr> attrs;
116 final Set<Flag> flags;
117 TagStackItem(DocTree tree, HtmlTag tag) {
118 this.tree = tree;
119 this.tag = tag;
120 attrs = EnumSet.noneOf(HtmlTag.Attr.class);
121 flags = EnumSet.noneOf(Flag.class);
122 }
123 @Override
124 public String toString() {
125 return String.valueOf(tag);
126 }
127 }
128
129 private Deque<TagStackItem> tagStack; // TODO: maybe want to record starting tree as well
130 private HtmlTag currHeaderTag;
131
132 private final int implicitHeaderLevel;
133
134 // <editor-fold defaultstate="collapsed" desc="Top level">
135
136 Checker(Env env) {
137 env.getClass();
138 this.env = env;
139 tagStack = new LinkedList<>();
140 implicitHeaderLevel = env.implicitHeaderLevel;
141 }
142
143 public Void scan(DocCommentTree tree, TreePath p) {
144 env.setCurrent(p, tree);
145
146 boolean isOverridingMethod = !env.currOverriddenMethods.isEmpty();
147
148 if (p.getLeaf() == p.getCompilationUnit()) {
149 // If p points to a compilation unit, the implied declaration is the
150 // package declaration (if any) for the compilation unit.
151 // Handle this case specially, because doc comments are only
152 // expected in package-info files.
153 JavaFileObject fo = p.getCompilationUnit().getSourceFile();
154 boolean isPkgInfo = fo.isNameCompatible("package-info", JavaFileObject.Kind.SOURCE);
155 if (tree == null) {
156 if (isPkgInfo)
157 reportMissing("dc.missing.comment");
158 return null;
159 } else {
160 if (!isPkgInfo)
161 reportReference("dc.unexpected.comment");
162 }
163 } else {
164 if (tree == null) {
165 if (!isSynthetic() && !isOverridingMethod)
166 reportMissing("dc.missing.comment");
167 return null;
168 }
169 }
170
171 tagStack.clear();
172 currHeaderTag = null;
173
174 foundParams.clear();
175 foundThrows.clear();
176 foundInheritDoc = false;
177 foundReturn = false;
178
179 scan(new DocTreePath(p, tree), null);
180
181 if (!isOverridingMethod) {
182 switch (env.currElement.getKind()) {
183 case METHOD:
184 case CONSTRUCTOR: {
185 ExecutableElement ee = (ExecutableElement) env.currElement;
186 checkParamsDocumented(ee.getTypeParameters());
187 checkParamsDocumented(ee.getParameters());
188 switch (ee.getReturnType().getKind()) {
189 case VOID:
190 case NONE:
191 break;
192 default:
193 if (!foundReturn
194 && !foundInheritDoc
195 && !env.types.isSameType(ee.getReturnType(), env.java_lang_Void)) {
196 reportMissing("dc.missing.return");
197 }
198 }
199 checkThrowsDocumented(ee.getThrownTypes());
200 }
201 }
202 }
203
204 return null;
205 }
206
207 private void reportMissing(String code, Object... args) {
208 env.messages.report(MISSING, Kind.WARNING, env.currPath.getLeaf(), code, args);
209 }
210
211 private void reportReference(String code, Object... args) {
212 env.messages.report(REFERENCE, Kind.WARNING, env.currPath.getLeaf(), code, args);
213 }
214
215 @Override
216 public Void visitDocComment(DocCommentTree tree, Void ignore) {
217 super.visitDocComment(tree, ignore);
218 for (TagStackItem tsi: tagStack) {
219 warnIfEmpty(tsi, null);
220 if (tsi.tree.getKind() == DocTree.Kind.START_ELEMENT
221 && tsi.tag.endKind == HtmlTag.EndKind.REQUIRED) {
222 StartElementTree t = (StartElementTree) tsi.tree;
223 env.messages.error(HTML, t, "dc.tag.not.closed", t.getName());
224 }
225 }
226 return null;
227 }
228 // </editor-fold>
229
230 // <editor-fold defaultstate="collapsed" desc="Text and entities.">
231
232 @Override
233 public Void visitText(TextTree tree, Void ignore) {
234 if (hasNonWhitespace(tree)) {
235 checkAllowsText(tree);
236 markEnclosingTag(Flag.HAS_TEXT);
237 }
238 return null;
239 }
240
241 @Override
242 public Void visitEntity(EntityTree tree, Void ignore) {
243 checkAllowsText(tree);
244 markEnclosingTag(Flag.HAS_TEXT);
245 String name = tree.getName().toString();
246 if (name.startsWith("#")) {
247 int v = StringUtils.toLowerCase(name).startsWith("#x")
248 ? Integer.parseInt(name.substring(2), 16)
249 : Integer.parseInt(name.substring(1), 10);
250 if (!Entity.isValid(v)) {
251 env.messages.error(HTML, tree, "dc.entity.invalid", name);
252 }
253 } else if (!Entity.isValid(name)) {
254 env.messages.error(HTML, tree, "dc.entity.invalid", name);
255 }
256 return null;
257 }
258
259 void checkAllowsText(DocTree tree) {
260 TagStackItem top = tagStack.peek();
261 if (top != null
262 && top.tree.getKind() == DocTree.Kind.START_ELEMENT
263 && !top.tag.acceptsText()) {
264 if (top.flags.add(Flag.REPORTED_BAD_INLINE)) {
265 env.messages.error(HTML, tree, "dc.text.not.allowed",
266 ((StartElementTree) top.tree).getName());
267 }
268 }
269 }
270
271 // </editor-fold>
272
273 // <editor-fold defaultstate="collapsed" desc="HTML elements">
274
275 @Override
276 public Void visitStartElement(StartElementTree tree, Void ignore) {
277 final Name treeName = tree.getName();
278 final HtmlTag t = HtmlTag.get(treeName);
279 if (t == null) {
280 env.messages.error(HTML, tree, "dc.tag.unknown", treeName);
281 } else {
282 boolean done = false;
283 for (TagStackItem tsi: tagStack) {
284 if (tsi.tag.accepts(t)) {
285 while (tagStack.peek() != tsi) {
286 warnIfEmpty(tagStack.peek(), null);
287 tagStack.pop();
288 }
289 done = true;
290 break;
291 } else if (tsi.tag.endKind != HtmlTag.EndKind.OPTIONAL) {
292 done = true;
293 break;
294 }
295 }
296 if (!done && HtmlTag.BODY.accepts(t)) {
297 while (!tagStack.isEmpty()) {
298 warnIfEmpty(tagStack.peek(), null);
299 tagStack.pop();
300 }
301 }
302
303 markEnclosingTag(Flag.HAS_ELEMENT);
304 checkStructure(tree, t);
305
306 // tag specific checks
307 switch (t) {
308 // check for out of sequence headers, such as <h1>...</h1> <h3>...</h3>
309 case H1: case H2: case H3: case H4: case H5: case H6:
310 checkHeader(tree, t);
311 break;
312 }
313
314 if (t.flags.contains(HtmlTag.Flag.NO_NEST)) {
315 for (TagStackItem i: tagStack) {
316 if (t == i.tag) {
317 env.messages.warning(HTML, tree, "dc.tag.nested.not.allowed", treeName);
318 break;
319 }
320 }
321 }
322 }
323
324 // check for self closing tags, such as <a id="name"/>
325 if (tree.isSelfClosing()) {
326 env.messages.error(HTML, tree, "dc.tag.self.closing", treeName);
327 }
328
329 try {
330 TagStackItem parent = tagStack.peek();
331 TagStackItem top = new TagStackItem(tree, t);
332 tagStack.push(top);
333
334 super.visitStartElement(tree, ignore);
335
336 // handle attributes that may or may not have been found in start element
337 if (t != null) {
338 switch (t) {
339 case CAPTION:
340 if (parent != null && parent.tag == HtmlTag.TABLE)
341 parent.flags.add(Flag.TABLE_HAS_CAPTION);
342 break;
343
344 case IMG:
345 if (!top.attrs.contains(HtmlTag.Attr.ALT))
346 env.messages.error(ACCESSIBILITY, tree, "dc.no.alt.attr.for.image");
347 break;
348 }
349 }
350
351 return null;
352 } finally {
353
354 if (t == null || t.endKind == HtmlTag.EndKind.NONE)
355 tagStack.pop();
356 }
357 }
358
359 private void checkStructure(StartElementTree tree, HtmlTag t) {
360 Name treeName = tree.getName();
361 TagStackItem top = tagStack.peek();
362 switch (t.blockType) {
363 case BLOCK:
364 if (top == null || top.tag.accepts(t))
365 return;
366
367 switch (top.tree.getKind()) {
368 case START_ELEMENT: {
369 if (top.tag.blockType == HtmlTag.BlockType.INLINE) {
370 Name name = ((StartElementTree) top.tree).getName();
371 env.messages.error(HTML, tree, "dc.tag.not.allowed.inline.element",
372 treeName, name);
373 return;
374 }
375 }
376 break;
377
378 case LINK:
379 case LINK_PLAIN: {
380 String name = top.tree.getKind().tagName;
381 env.messages.error(HTML, tree, "dc.tag.not.allowed.inline.tag",
382 treeName, name);
383 return;
384 }
385 }
386 break;
387
388 case INLINE:
389 if (top == null || top.tag.accepts(t))
390 return;
391 break;
392
393 case LIST_ITEM:
394 case TABLE_ITEM:
395 if (top != null) {
396 // reset this flag so subsequent bad inline content gets reported
397 top.flags.remove(Flag.REPORTED_BAD_INLINE);
398 if (top.tag.accepts(t))
399 return;
400 }
401 break;
402
403 case OTHER:
404 env.messages.error(HTML, tree, "dc.tag.not.allowed", treeName);
405 return;
406 }
407
408 env.messages.error(HTML, tree, "dc.tag.not.allowed.here", treeName);
409 }
410
411 private void checkHeader(StartElementTree tree, HtmlTag tag) {
412 // verify the new tag
413 if (getHeaderLevel(tag) > getHeaderLevel(currHeaderTag) + 1) {
414 if (currHeaderTag == null) {
415 env.messages.error(ACCESSIBILITY, tree, "dc.tag.header.sequence.1", tag);
416 } else {
417 env.messages.error(ACCESSIBILITY, tree, "dc.tag.header.sequence.2",
418 tag, currHeaderTag);
419 }
420 }
421
422 currHeaderTag = tag;
423 }
424
425 private int getHeaderLevel(HtmlTag tag) {
426 if (tag == null)
427 return implicitHeaderLevel;
428 switch (tag) {
429 case H1: return 1;
430 case H2: return 2;
431 case H3: return 3;
432 case H4: return 4;
433 case H5: return 5;
434 case H6: return 6;
435 default: throw new IllegalArgumentException();
436 }
437 }
438
439 @Override
440 public Void visitEndElement(EndElementTree tree, Void ignore) {
441 final Name treeName = tree.getName();
442 final HtmlTag t = HtmlTag.get(treeName);
443 if (t == null) {
444 env.messages.error(HTML, tree, "dc.tag.unknown", treeName);
445 } else if (t.endKind == HtmlTag.EndKind.NONE) {
446 env.messages.error(HTML, tree, "dc.tag.end.not.permitted", treeName);
447 } else {
448 boolean done = false;
449 while (!tagStack.isEmpty()) {
450 TagStackItem top = tagStack.peek();
451 if (t == top.tag) {
452 switch (t) {
453 case TABLE:
454 if (!top.attrs.contains(HtmlTag.Attr.SUMMARY)
455 && !top.flags.contains(Flag.TABLE_HAS_CAPTION)) {
456 env.messages.error(ACCESSIBILITY, tree,
457 "dc.no.summary.or.caption.for.table");
458 }
459 }
460 warnIfEmpty(top, tree);
461 tagStack.pop();
462 done = true;
463 break;
464 } else if (top.tag == null || top.tag.endKind != HtmlTag.EndKind.REQUIRED) {
465 tagStack.pop();
466 } else {
467 boolean found = false;
468 for (TagStackItem si: tagStack) {
469 if (si.tag == t) {
470 found = true;
471 break;
472 }
473 }
474 if (found && top.tree.getKind() == DocTree.Kind.START_ELEMENT) {
475 env.messages.error(HTML, top.tree, "dc.tag.start.unmatched",
476 ((StartElementTree) top.tree).getName());
477 tagStack.pop();
478 } else {
479 env.messages.error(HTML, tree, "dc.tag.end.unexpected", treeName);
480 done = true;
481 break;
482 }
483 }
484 }
485
486 if (!done && tagStack.isEmpty()) {
487 env.messages.error(HTML, tree, "dc.tag.end.unexpected", treeName);
488 }
489 }
490
491 return super.visitEndElement(tree, ignore);
492 }
493
494 void warnIfEmpty(TagStackItem tsi, DocTree endTree) {
495 if (tsi.tag != null && tsi.tree instanceof StartElementTree) {
496 if (tsi.tag.flags.contains(HtmlTag.Flag.EXPECT_CONTENT)
497 && !tsi.flags.contains(Flag.HAS_TEXT)
498 && !tsi.flags.contains(Flag.HAS_ELEMENT)
499 && !tsi.flags.contains(Flag.HAS_INLINE_TAG)) {
500 DocTree tree = (endTree != null) ? endTree : tsi.tree;
501 Name treeName = ((StartElementTree) tsi.tree).getName();
502 env.messages.warning(HTML, tree, "dc.tag.empty", treeName);
503 }
504 }
505 }
506
507 // </editor-fold>
508
509 // <editor-fold defaultstate="collapsed" desc="HTML attributes">
510
511 @Override @SuppressWarnings("fallthrough")
512 public Void visitAttribute(AttributeTree tree, Void ignore) {
513 HtmlTag currTag = tagStack.peek().tag;
514 if (currTag != null) {
515 Name name = tree.getName();
516 HtmlTag.Attr attr = currTag.getAttr(name);
517 if (attr != null) {
518 boolean first = tagStack.peek().attrs.add(attr);
519 if (!first)
520 env.messages.error(HTML, tree, "dc.attr.repeated", name);
521 }
522 AttrKind k = currTag.getAttrKind(name);
523 switch (k) {
524 case OK:
525 break;
526
527 case INVALID:
528 env.messages.error(HTML, tree, "dc.attr.unknown", name);
529 break;
530
531 case OBSOLETE:
532 env.messages.warning(ACCESSIBILITY, tree, "dc.attr.obsolete", name);
533 break;
534
535 case USE_CSS:
536 env.messages.warning(ACCESSIBILITY, tree, "dc.attr.obsolete.use.css", name);
537 break;
538 }
539
540 if (attr != null) {
541 switch (attr) {
542 case NAME:
543 if (currTag != HtmlTag.A) {
544 break;
545 }
546 // fallthrough
547 case ID:
548 String value = getAttrValue(tree);
549 if (value == null) {
550 env.messages.error(HTML, tree, "dc.anchor.value.missing");
551 } else {
552 if (!validName.matcher(value).matches()) {
553 env.messages.error(HTML, tree, "dc.invalid.anchor", value);
554 }
555 if (!checkAnchor(value)) {
556 env.messages.error(HTML, tree, "dc.anchor.already.defined", value);
557 }
558 }
559 break;
560
561 case HREF:
562 if (currTag == HtmlTag.A) {
563 String v = getAttrValue(tree);
564 if (v == null || v.isEmpty()) {
565 env.messages.error(HTML, tree, "dc.attr.lacks.value");
566 } else {
567 Matcher m = docRoot.matcher(v);
568 if (m.matches()) {
569 String rest = m.group(2);
570 if (!rest.isEmpty())
571 checkURI(tree, rest);
572 } else {
573 checkURI(tree, v);
574 }
575 }
576 }
577 break;
578
579 case VALUE:
580 if (currTag == HtmlTag.LI) {
581 String v = getAttrValue(tree);
582 if (v == null || v.isEmpty()) {
583 env.messages.error(HTML, tree, "dc.attr.lacks.value");
584 } else if (!validNumber.matcher(v).matches()) {
585 env.messages.error(HTML, tree, "dc.attr.not.number");
586 }
587 }
588 break;
589 }
590 }
591 }
592
593 // TODO: basic check on value
594
595 return super.visitAttribute(tree, ignore);
596 }
597
598 private boolean checkAnchor(String name) {
599 Element e = getEnclosingPackageOrClass(env.currElement);
600 if (e == null)
601 return true;
602 Set<String> set = foundAnchors.get(e);
603 if (set == null)
604 foundAnchors.put(e, set = new HashSet<>());
605 return set.add(name);
606 }
607
608 private Element getEnclosingPackageOrClass(Element e) {
609 while (e != null) {
610 switch (e.getKind()) {
611 case CLASS:
612 case ENUM:
613 case INTERFACE:
614 case PACKAGE:
615 return e;
616 default:
617 e = e.getEnclosingElement();
618 }
619 }
620 return e;
621 }
622
623 // http://www.w3.org/TR/html401/types.html#type-name
624 private static final Pattern validName = Pattern.compile("[A-Za-z][A-Za-z0-9-_:.]*");
625
626 private static final Pattern validNumber = Pattern.compile("-?[0-9]+");
627
628 // pattern to remove leading {@docRoot}/?
629 private static final Pattern docRoot = Pattern.compile("(?i)(\\{@docRoot *\\}/?)?(.*)");
630
631 private String getAttrValue(AttributeTree tree) {
632 if (tree.getValue() == null)
633 return null;
634
635 StringWriter sw = new StringWriter();
636 try {
637 new DocPretty(sw).print(tree.getValue());
638 } catch (IOException e) {
639 // cannot happen
640 }
641 // ignore potential use of entities for now
642 return sw.toString();
643 }
644
645 private void checkURI(AttributeTree tree, String uri) {
646 try {
647 URI u = new URI(uri);
648 } catch (URISyntaxException e) {
649 env.messages.error(HTML, tree, "dc.invalid.uri", uri);
650 }
651 }
652 // </editor-fold>
653
654 // <editor-fold defaultstate="collapsed" desc="javadoc tags">
655
656 @Override
657 public Void visitAuthor(AuthorTree tree, Void ignore) {
658 warnIfEmpty(tree, tree.getName());
659 return super.visitAuthor(tree, ignore);
660 }
661
662 @Override
663 public Void visitDocRoot(DocRootTree tree, Void ignore) {
664 markEnclosingTag(Flag.HAS_INLINE_TAG);
665 return super.visitDocRoot(tree, ignore);
666 }
667
668 @Override
669 public Void visitInheritDoc(InheritDocTree tree, Void ignore) {
670 markEnclosingTag(Flag.HAS_INLINE_TAG);
671 // TODO: verify on overridden method
672 foundInheritDoc = true;
673 return super.visitInheritDoc(tree, ignore);
674 }
675
676 @Override
677 public Void visitLink(LinkTree tree, Void ignore) {
678 markEnclosingTag(Flag.HAS_INLINE_TAG);
679 // simulate inline context on tag stack
680 HtmlTag t = (tree.getKind() == DocTree.Kind.LINK)
681 ? HtmlTag.CODE : HtmlTag.SPAN;
682 tagStack.push(new TagStackItem(tree, t));
683 try {
684 return super.visitLink(tree, ignore);
685 } finally {
686 tagStack.pop();
687 }
688 }
689
690 @Override
691 public Void visitLiteral(LiteralTree tree, Void ignore) {
692 markEnclosingTag(Flag.HAS_INLINE_TAG);
693 if (tree.getKind() == DocTree.Kind.CODE) {
694 for (TagStackItem tsi: tagStack) {
695 if (tsi.tag == HtmlTag.CODE) {
696 env.messages.warning(HTML, tree, "dc.tag.code.within.code");
697 break;
698 }
699 }
700 }
701 return super.visitLiteral(tree, ignore);
702 }
703
704 @Override
705 @SuppressWarnings("fallthrough")
706 public Void visitParam(ParamTree tree, Void ignore) {
707 boolean typaram = tree.isTypeParameter();
708 IdentifierTree nameTree = tree.getName();
709 Element paramElement = nameTree != null ? env.trees.getElement(new DocTreePath(getCurrentPath(), nameTree)) : null;
710
711 if (paramElement == null) {
712 switch (env.currElement.getKind()) {
713 case CLASS: case INTERFACE: {
714 if (!typaram) {
715 env.messages.error(REFERENCE, tree, "dc.invalid.param");
716 break;
717 }
718 }
719 case METHOD: case CONSTRUCTOR: {
720 env.messages.error(REFERENCE, nameTree, "dc.param.name.not.found");
721 break;
722 }
723
724 default:
725 env.messages.error(REFERENCE, tree, "dc.invalid.param");
726 break;
727 }
728 } else {
729 foundParams.add(paramElement);
730 }
731
732 warnIfEmpty(tree, tree.getDescription());
733 return super.visitParam(tree, ignore);
734 }
735
736 private void checkParamsDocumented(List<? extends Element> list) {
737 if (foundInheritDoc)
738 return;
739
740 for (Element e: list) {
741 if (!foundParams.contains(e)) {
742 CharSequence paramName = (e.getKind() == ElementKind.TYPE_PARAMETER)
743 ? "<" + e.getSimpleName() + ">"
744 : e.getSimpleName();
745 reportMissing("dc.missing.param", paramName);
746 }
747 }
748 }
749
750 @Override
751 public Void visitReference(ReferenceTree tree, Void ignore) {
752 String sig = tree.getSignature();
753 if (sig.contains("<") || sig.contains(">"))
754 env.messages.error(REFERENCE, tree, "dc.type.arg.not.allowed");
755
756 Element e = env.trees.getElement(getCurrentPath());
757 if (e == null)
758 env.messages.error(REFERENCE, tree, "dc.ref.not.found");
759 return super.visitReference(tree, ignore);
760 }
761
762 @Override
763 public Void visitReturn(ReturnTree tree, Void ignore) {
764 Element e = env.trees.getElement(env.currPath);
765 if (e.getKind() != ElementKind.METHOD
766 || ((ExecutableElement) e).getReturnType().getKind() == TypeKind.VOID)
767 env.messages.error(REFERENCE, tree, "dc.invalid.return");
768 foundReturn = true;
769 warnIfEmpty(tree, tree.getDescription());
770 return super.visitReturn(tree, ignore);
771 }
772
773 @Override
774 public Void visitSerialData(SerialDataTree tree, Void ignore) {
775 warnIfEmpty(tree, tree.getDescription());
776 return super.visitSerialData(tree, ignore);
777 }
778
779 @Override
780 public Void visitSerialField(SerialFieldTree tree, Void ignore) {
781 warnIfEmpty(tree, tree.getDescription());
782 return super.visitSerialField(tree, ignore);
783 }
784
785 @Override
786 public Void visitSince(SinceTree tree, Void ignore) {
787 warnIfEmpty(tree, tree.getBody());
788 return super.visitSince(tree, ignore);
789 }
790
791 @Override
792 public Void visitThrows(ThrowsTree tree, Void ignore) {
793 ReferenceTree exName = tree.getExceptionName();
794 Element ex = env.trees.getElement(new DocTreePath(getCurrentPath(), exName));
795 if (ex == null) {
796 env.messages.error(REFERENCE, tree, "dc.ref.not.found");
797 } else if (isThrowable(ex.asType())) {
798 switch (env.currElement.getKind()) {
799 case CONSTRUCTOR:
800 case METHOD:
801 if (isCheckedException(ex.asType())) {
802 ExecutableElement ee = (ExecutableElement) env.currElement;
803 checkThrowsDeclared(exName, ex.asType(), ee.getThrownTypes());
804 }
805 break;
806 default:
807 env.messages.error(REFERENCE, tree, "dc.invalid.throws");
808 }
809 } else {
810 env.messages.error(REFERENCE, tree, "dc.invalid.throws");
811 }
812 warnIfEmpty(tree, tree.getDescription());
813 return scan(tree.getDescription(), ignore);
814 }
815
816 private boolean isThrowable(TypeMirror tm) {
817 switch (tm.getKind()) {
818 case DECLARED:
819 case TYPEVAR:
820 return env.types.isAssignable(tm, env.java_lang_Throwable);
821 }
822 return false;
823 }
824
825 private void checkThrowsDeclared(ReferenceTree tree, TypeMirror t, List<? extends TypeMirror> list) {
826 boolean found = false;
827 for (TypeMirror tl : list) {
828 if (env.types.isAssignable(t, tl)) {
829 foundThrows.add(tl);
830 found = true;
831 }
832 }
833 if (!found)
834 env.messages.error(REFERENCE, tree, "dc.exception.not.thrown", t);
835 }
836
837 private void checkThrowsDocumented(List<? extends TypeMirror> list) {
838 if (foundInheritDoc)
839 return;
840
841 for (TypeMirror tl: list) {
842 if (isCheckedException(tl) && !foundThrows.contains(tl))
843 reportMissing("dc.missing.throws", tl);
844 }
845 }
846
847 @Override
848 public Void visitUnknownBlockTag(UnknownBlockTagTree tree, Void ignore) {
849 checkUnknownTag(tree, tree.getTagName());
850 return super.visitUnknownBlockTag(tree, ignore);
851 }
852
853 @Override
854 public Void visitUnknownInlineTag(UnknownInlineTagTree tree, Void ignore) {
855 checkUnknownTag(tree, tree.getTagName());
856 return super.visitUnknownInlineTag(tree, ignore);
857 }
858
859 private void checkUnknownTag(DocTree tree, String tagName) {
860 if (env.customTags != null && !env.customTags.contains(tagName))
861 env.messages.error(SYNTAX, tree, "dc.tag.unknown", tagName);
862 }
863
864 @Override
865 public Void visitValue(ValueTree tree, Void ignore) {
866 ReferenceTree ref = tree.getReference();
867 if (ref == null || ref.getSignature().isEmpty()) {
868 if (!isConstant(env.currElement))
869 env.messages.error(REFERENCE, tree, "dc.value.not.allowed.here");
870 } else {
871 Element e = env.trees.getElement(new DocTreePath(getCurrentPath(), ref));
872 if (!isConstant(e))
873 env.messages.error(REFERENCE, tree, "dc.value.not.a.constant");
874 }
875
876 markEnclosingTag(Flag.HAS_INLINE_TAG);
877 return super.visitValue(tree, ignore);
878 }
879
880 private boolean isConstant(Element e) {
881 if (e == null)
882 return false;
883
884 switch (e.getKind()) {
885 case FIELD:
886 Object value = ((VariableElement) e).getConstantValue();
887 return (value != null); // can't distinguish "not a constant" from "constant is null"
888 default:
889 return false;
890 }
891 }
892
893 @Override
894 public Void visitVersion(VersionTree tree, Void ignore) {
895 warnIfEmpty(tree, tree.getBody());
896 return super.visitVersion(tree, ignore);
897 }
898
899 @Override
900 public Void visitErroneous(ErroneousTree tree, Void ignore) {
901 env.messages.error(SYNTAX, tree, null, tree.getDiagnostic().getMessage(null));
902 return null;
903 }
904 // </editor-fold>
905
906 // <editor-fold defaultstate="collapsed" desc="Utility methods">
907
908 private boolean isCheckedException(TypeMirror t) {
909 return !(env.types.isAssignable(t, env.java_lang_Error)
910 || env.types.isAssignable(t, env.java_lang_RuntimeException));
911 }
912
913 private boolean isSynthetic() {
914 switch (env.currElement.getKind()) {
915 case CONSTRUCTOR:
916 // A synthetic default constructor has the same pos as the
917 // enclosing class
918 TreePath p = env.currPath;
919 return env.getPos(p) == env.getPos(p.getParentPath());
920 }
921 return false;
922 }
923
924 void markEnclosingTag(Flag flag) {
925 TagStackItem top = tagStack.peek();
926 if (top != null)
927 top.flags.add(flag);
928 }
929
930 String toString(TreePath p) {
931 StringBuilder sb = new StringBuilder("TreePath[");
932 toString(p, sb);
933 sb.append("]");
934 return sb.toString();
935 }
936
937 void toString(TreePath p, StringBuilder sb) {
938 TreePath parent = p.getParentPath();
939 if (parent != null) {
940 toString(parent, sb);
941 sb.append(",");
942 }
943 sb.append(p.getLeaf().getKind()).append(":").append(env.getPos(p)).append(":S").append(env.getStartPos(p));
944 }
945
946 void warnIfEmpty(DocTree tree, List<? extends DocTree> list) {
947 for (DocTree d: list) {
948 switch (d.getKind()) {
949 case TEXT:
950 if (hasNonWhitespace((TextTree) d))
951 return;
952 break;
953 default:
954 return;
955 }
956 }
957 env.messages.warning(SYNTAX, tree, "dc.empty", tree.getKind().tagName);
958 }
959
960 boolean hasNonWhitespace(TextTree tree) {
961 String s = tree.getBody();
962 for (int i = 0; i < s.length(); i++) {
963 if (!Character.isWhitespace(s.charAt(i)))
964 return true;
965 }
966 return false;
967 }
968
969 // </editor-fold>
970
971 }

Mercurial Repository: jdk8-mips64-public/langtools

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