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}