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 }