001///////////////////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code and other text files for adherence to a set of rules.
003// Copyright (C) 2001-2024 the original author or authors.
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018///////////////////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle.checks.whitespace;
021
022import com.puppycrawl.tools.checkstyle.api.DetailAST;
023import com.puppycrawl.tools.checkstyle.api.TokenTypes;
024
025/**
026 * <p>
027 * Checks the policy on the padding of parentheses for typecasts. That is, whether a space
028 * is required after a left parenthesis and before a right parenthesis, or such
029 * spaces are forbidden.
030 * </p>
031 * <ul>
032 * <li>
033 * Property {@code option} - Specify policy on how to pad parentheses.
034 * Type is {@code com.puppycrawl.tools.checkstyle.checks.whitespace.PadOption}.
035 * Default value is {@code nospace}.
036 * </li>
037 * </ul>
038 * <p>
039 * Parent is {@code com.puppycrawl.tools.checkstyle.TreeWalker}
040 * </p>
041 * <p>
042 * Violation Message Keys:
043 * </p>
044 * <ul>
045 * <li>
046 * {@code ws.followed}
047 * </li>
048 * <li>
049 * {@code ws.notFollowed}
050 * </li>
051 * <li>
052 * {@code ws.notPreceded}
053 * </li>
054 * <li>
055 * {@code ws.preceded}
056 * </li>
057 * </ul>
058 *
059 * @since 3.2
060 */
061public class TypecastParenPadCheck extends AbstractParenPadCheck {
062
063    @Override
064    public int[] getRequiredTokens() {
065        return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST};
066    }
067
068    @Override
069    public int[] getDefaultTokens() {
070        return getRequiredTokens();
071    }
072
073    @Override
074    public int[] getAcceptableTokens() {
075        return getRequiredTokens();
076    }
077
078    @Override
079    public void visitToken(DetailAST ast) {
080        // Strange logic in this method to guard against checking RPAREN tokens
081        // that are not associated with a TYPECAST token.
082        if (ast.getType() == TokenTypes.TYPECAST) {
083            processLeft(ast);
084        }
085        else if (ast.getParent().getType() == TokenTypes.TYPECAST
086                 && ast.getParent().findFirstToken(TokenTypes.RPAREN) == ast) {
087            processRight(ast);
088        }
089    }
090
091}