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.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 * <ul>
32 * <li>
33 * Property {@code option} - Specify policy on how to pad parentheses.
34 * Type is {@code com.puppycrawl.tools.checkstyle.checks.whitespace.PadOption}.
35 * Default value is {@code nospace}.
36 * </li>
37 * </ul>
38 *
39 * <p>
40 * Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
41 * </p>
42 *
43 * <p>
44 * Violation Message Keys:
45 * </p>
46 * <ul>
47 * <li>
48 * {@code ws.followed}
49 * </li>
50 * <li>
51 * {@code ws.notFollowed}
52 * </li>
53 * <li>
54 * {@code ws.notPreceded}
55 * </li>
56 * <li>
57 * {@code ws.preceded}
58 * </li>
59 * </ul>
60 *
61 * @since 3.2
62 */
63 public class TypecastParenPadCheck extends AbstractParenPadCheck {
64
65 @Override
66 public int[] getRequiredTokens() {
67 return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST};
68 }
69
70 @Override
71 public int[] getDefaultTokens() {
72 return getRequiredTokens();
73 }
74
75 @Override
76 public int[] getAcceptableTokens() {
77 return getRequiredTokens();
78 }
79
80 @Override
81 public void visitToken(DetailAST ast) {
82 // Strange logic in this method to guard against checking RPAREN tokens
83 // that are not associated with a TYPECAST token.
84 if (ast.getType() == TokenTypes.TYPECAST) {
85 processLeft(ast);
86 }
87 else if (ast.getParent().getType() == TokenTypes.TYPECAST
88 && ast.getParent().findFirstToken(TokenTypes.RPAREN) == ast) {
89 processRight(ast);
90 }
91 }
92
93 }