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