1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2026 the original author or authors.
4 //
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Lesser General Public
7 // License as published by the Free Software Foundation; either
8 // version 2.1 of the License, or (at your option) any later version.
9 //
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ///////////////////////////////////////////////////////////////////////////////////////////////
19
20 package com.puppycrawl.tools.checkstyle.checks.javadoc;
21
22 import com.puppycrawl.tools.checkstyle.StatelessCheck;
23 import com.puppycrawl.tools.checkstyle.api.DetailNode;
24 import com.puppycrawl.tools.checkstyle.api.JavadocCommentsTokenTypes;
25 import com.puppycrawl.tools.checkstyle.utils.JavadocUtil;
26
27 /**
28 * <div>
29 * Checks that the block tag is followed by description.
30 * </div>
31 *
32 * @since 6.0
33 */
34 @StatelessCheck
35 public class NonEmptyAtclauseDescriptionCheck extends AbstractJavadocCheck {
36
37 /**
38 * A key is pointing to the warning message text in "messages.properties"
39 * file.
40 */
41 public static final String MSG_KEY = "non.empty.atclause";
42
43 /**
44 * Creates a new {@code NonEmptyAtclauseDescriptionCheck} instance.
45 */
46 public NonEmptyAtclauseDescriptionCheck() {
47 // no code by default
48 }
49
50 @Override
51 public int[] getDefaultJavadocTokens() {
52 return new int[] {
53 JavadocCommentsTokenTypes.PARAM_BLOCK_TAG,
54 JavadocCommentsTokenTypes.RETURN_BLOCK_TAG,
55 JavadocCommentsTokenTypes.THROWS_BLOCK_TAG,
56 JavadocCommentsTokenTypes.EXCEPTION_BLOCK_TAG,
57 JavadocCommentsTokenTypes.DEPRECATED_BLOCK_TAG,
58 JavadocCommentsTokenTypes.SINCE_BLOCK_TAG,
59 };
60 }
61
62 /**
63 * Adds a set of tokens the check is interested in.
64 *
65 * @param strRep the string representation of the tokens interested in
66 * @propertySince 7.3
67 */
68 @Override
69 public void setJavadocTokens(String... strRep) {
70 super.setJavadocTokens(strRep);
71 }
72
73 @Override
74 public void visitJavadocToken(DetailNode ast) {
75 if (isEmptyTag(ast)) {
76 log(ast.getLineNumber(), MSG_KEY);
77 }
78 }
79
80 /**
81 * Tests if block tag is empty.
82 *
83 * @param tagNode block tag.
84 * @return true, if block tag is empty.
85 */
86 private static boolean isEmptyTag(DetailNode tagNode) {
87 final DetailNode tagDescription =
88 JavadocUtil.findFirstToken(tagNode, JavadocCommentsTokenTypes.DESCRIPTION);
89 return tagDescription == null;
90 }
91
92 }