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.whitespace;
21
22 import com.puppycrawl.tools.checkstyle.api.DetailAST;
23 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
24
25 /**
26 * <div>
27 * Checks the policy on the padding of parentheses for typecasts. That is, whether a space
28 * is required after a left parenthesis and before a right parenthesis, or such
29 * spaces are forbidden.
30 * </div>
31 *
32 * @since 3.2
33 */
34 public class TypecastParenPadCheck extends AbstractParenPadCheck {
35
36 /**
37 * A key is pointing to the warning message text in "messages.properties"
38 * file.
39 */
40 public static final String MSG_WS_FOLLOWED = "ws.followed";
41
42 /**
43 * A key is pointing to the warning message text in "messages.properties"
44 * file.
45 */
46 public static final String MSG_WS_NOT_FOLLOWED = "ws.notFollowed";
47
48 /**
49 * A key is pointing to the warning message text in "messages.properties"
50 * file.
51 */
52 public static final String MSG_WS_PRECEDED = "ws.preceded";
53
54 /**
55 * A key is pointing to the warning message text in "messages.properties"
56 * file.
57 */
58 public static final String MSG_WS_NOT_PRECEDED = "ws.notPreceded";
59
60 /**
61 * Creates a new {@code TypecastParenPadCheck} instance.
62 */
63 public TypecastParenPadCheck() {
64 super(MSG_WS_FOLLOWED, MSG_WS_NOT_FOLLOWED, MSG_WS_PRECEDED, MSG_WS_NOT_PRECEDED);
65 }
66
67 @Override
68 public int[] getRequiredTokens() {
69 return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST};
70 }
71
72 @Override
73 public int[] getDefaultTokens() {
74 return getRequiredTokens();
75 }
76
77 @Override
78 public int[] getAcceptableTokens() {
79 return getRequiredTokens();
80 }
81
82 @Override
83 public void visitToken(DetailAST ast) {
84 // Strange logic in this method to guard against checking RPAREN tokens
85 // that are not associated with a TYPECAST token.
86 if (ast.getType() == TokenTypes.TYPECAST) {
87 processLeft(ast);
88 }
89 else if (ast.getParent().getType() == TokenTypes.TYPECAST
90 && ast.getParent().findFirstToken(TokenTypes.RPAREN) == ast) {
91 processRight(ast);
92 }
93 }
94
95 }