1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2024 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.coding;
21
22 import java.util.Objects;
23 import java.util.regex.Pattern;
24
25 import com.puppycrawl.tools.checkstyle.StatelessCheck;
26 import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
27 import com.puppycrawl.tools.checkstyle.api.DetailAST;
28 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
29 import com.puppycrawl.tools.checkstyle.utils.CommonUtil;
30
31 /**
32 * <p>
33 * Checks specified tokens text for matching an illegal pattern.
34 * By default, no tokens are specified.
35 * </p>
36 * <ul>
37 * <li>
38 * Property {@code format} - Define the RegExp for illegal pattern.
39 * Type is {@code java.util.regex.Pattern}.
40 * Default value is {@code "^$"}.
41 * </li>
42 * <li>
43 * Property {@code ignoreCase} - Control whether to ignore case when matching.
44 * Type is {@code boolean}.
45 * Default value is {@code false}.
46 * </li>
47 * <li>
48 * Property {@code message} - Define the message which is used to notify about violations;
49 * if empty then the default message is used.
50 * Type is {@code java.lang.String}.
51 * Default value is {@code ""}.
52 * </li>
53 * <li>
54 * Property {@code tokens} - tokens to check
55 * Type is {@code java.lang.String[]}.
56 * Validation type is {@code tokenSet}.
57 * Default value is: {@code ""}.
58 * </li>
59 * </ul>
60 * <p>
61 * Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
62 * </p>
63 * <p>
64 * Violation Message Keys:
65 * </p>
66 * <ul>
67 * <li>
68 * {@code illegal.token.text}
69 * </li>
70 * </ul>
71 *
72 * @since 3.2
73 */
74 @StatelessCheck
75 public class IllegalTokenTextCheck
76 extends AbstractCheck {
77
78 /**
79 * A key is pointing to the warning message text in "messages.properties"
80 * file.
81 */
82 public static final String MSG_KEY = "illegal.token.text";
83
84 /**
85 * Define the message which is used to notify about violations;
86 * if empty then the default message is used.
87 */
88 private String message = "";
89
90 /** The format string of the regexp. */
91 private String formatString = "^$";
92
93 /** Define the RegExp for illegal pattern. */
94 private Pattern format = Pattern.compile(formatString);
95
96 /** Control whether to ignore case when matching. */
97 private boolean ignoreCase;
98
99 @Override
100 public int[] getDefaultTokens() {
101 return CommonUtil.EMPTY_INT_ARRAY;
102 }
103
104 @Override
105 public int[] getAcceptableTokens() {
106 return new int[] {
107 TokenTypes.NUM_DOUBLE,
108 TokenTypes.NUM_FLOAT,
109 TokenTypes.NUM_INT,
110 TokenTypes.NUM_LONG,
111 TokenTypes.IDENT,
112 TokenTypes.COMMENT_CONTENT,
113 TokenTypes.STRING_LITERAL,
114 TokenTypes.CHAR_LITERAL,
115 TokenTypes.TEXT_BLOCK_CONTENT,
116 };
117 }
118
119 @Override
120 public int[] getRequiredTokens() {
121 return CommonUtil.EMPTY_INT_ARRAY;
122 }
123
124 @Override
125 public boolean isCommentNodesRequired() {
126 return true;
127 }
128
129 @Override
130 public void visitToken(DetailAST ast) {
131 final String text = ast.getText();
132 if (format.matcher(text).find()) {
133 String customMessage = message;
134 if (customMessage.isEmpty()) {
135 customMessage = MSG_KEY;
136 }
137 log(
138 ast,
139 customMessage,
140 formatString);
141 }
142 }
143
144 /**
145 * Setter to define the message which is used to notify about violations;
146 * if empty then the default message is used.
147 *
148 * @param message custom message which should be used
149 * to report about violations.
150 * @since 3.2
151 */
152 public void setMessage(String message) {
153 this.message = Objects.requireNonNullElse(message, "");
154 }
155
156 /**
157 * Setter to define the RegExp for illegal pattern.
158 *
159 * @param format a {@code String} value
160 * @since 3.2
161 */
162 public void setFormat(String format) {
163 formatString = format;
164 updateRegexp();
165 }
166
167 /**
168 * Setter to control whether to ignore case when matching.
169 *
170 * @param caseInsensitive true if the match is case-insensitive.
171 * @since 3.2
172 */
173 public void setIgnoreCase(boolean caseInsensitive) {
174 ignoreCase = caseInsensitive;
175 updateRegexp();
176 }
177
178 /**
179 * Updates the {@link #format} based on the values from {@link #formatString} and
180 * {@link #ignoreCase}.
181 */
182 private void updateRegexp() {
183 final int compileFlags;
184 if (ignoreCase) {
185 compileFlags = Pattern.CASE_INSENSITIVE;
186 }
187 else {
188 compileFlags = 0;
189 }
190 format = CommonUtil.createPattern(formatString, compileFlags);
191 }
192
193 }