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.naming;
21
22 import com.puppycrawl.tools.checkstyle.api.DetailAST;
23 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
24 import com.puppycrawl.tools.checkstyle.utils.ScopeUtil;
25
26 /**
27 * <p>
28 * Checks that instance variable names conform to a specified pattern.
29 * </p>
30 * <ul>
31 * <li>
32 * Property {@code applyToPackage} - Control if check should apply to package-private members.
33 * Type is {@code boolean}.
34 * Default value is {@code true}.
35 * </li>
36 * <li>
37 * Property {@code applyToPrivate} - Control if check should apply to private members.
38 * Type is {@code boolean}.
39 * Default value is {@code true}.
40 * </li>
41 * <li>
42 * Property {@code applyToProtected} - Control if check should apply to protected members.
43 * Type is {@code boolean}.
44 * Default value is {@code true}.
45 * </li>
46 * <li>
47 * Property {@code applyToPublic} - Control if check should apply to public members.
48 * Type is {@code boolean}.
49 * Default value is {@code true}.
50 * </li>
51 * <li>
52 * Property {@code format} - Sets the pattern to match valid identifiers.
53 * Type is {@code java.util.regex.Pattern}.
54 * Default value is {@code "^[a-z][a-zA-Z0-9]*$"}.
55 * </li>
56 * </ul>
57 * <p>
58 * Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
59 * </p>
60 * <p>
61 * Violation Message Keys:
62 * </p>
63 * <ul>
64 * <li>
65 * {@code name.invalidPattern}
66 * </li>
67 * </ul>
68 *
69 * @since 3.0
70 */
71 public class MemberNameCheck
72 extends AbstractAccessControlNameCheck {
73
74 /** Creates a new {@code MemberNameCheck} instance. */
75 public MemberNameCheck() {
76 super("^[a-z][a-zA-Z0-9]*$");
77 }
78
79 @Override
80 public int[] getDefaultTokens() {
81 return getRequiredTokens();
82 }
83
84 @Override
85 public int[] getAcceptableTokens() {
86 return getRequiredTokens();
87 }
88
89 @Override
90 public int[] getRequiredTokens() {
91 return new int[] {TokenTypes.VARIABLE_DEF};
92 }
93
94 @Override
95 protected final boolean mustCheckName(DetailAST ast) {
96 final DetailAST modifiersAST =
97 ast.findFirstToken(TokenTypes.MODIFIERS);
98 final boolean isStatic = modifiersAST.findFirstToken(TokenTypes.LITERAL_STATIC) != null;
99
100 return !isStatic && !ScopeUtil.isInInterfaceOrAnnotationBlock(ast)
101 && !ScopeUtil.isLocalVariableDef(ast)
102 && shouldCheckInScope(modifiersAST);
103 }
104
105 }