001//////////////////////////////////////////////////////////////////////////////// 002// checkstyle: Checks Java source code for adherence to a set of rules. 003// Copyright (C) 2001-2014 Oliver Burn 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//////////////////////////////////////////////////////////////////////////////// 019package com.puppycrawl.tools.checkstyle.checks.whitespace; 020 021import com.puppycrawl.tools.checkstyle.api.DetailAST; 022import com.puppycrawl.tools.checkstyle.api.TokenTypes; 023 024/** 025 * <p>Checks the padding of parentheses for typecasts. That is whether a space 026 * is required after a left parenthesis and before a right parenthesis, or such 027 * spaces are forbidden. 028 * </p> 029 * <p> 030 * The policy to verify is specified using the {@link PadOption} class and 031 * defaults to {@link PadOption#NOSPACE}. 032 * </p> 033 * <p> 034 * An example of how to configure the check is: 035 * </p> 036 * <pre> 037 * <module name="TypecastParenPad"/> 038 * </pre> 039 * <p> 040 * An example of how to configure the check to require spaces for the 041 * parentheses of constructor, method, and super constructor invocations is: 042 * </p> 043 * <pre> 044 * <module name="TypecastParenPad"> 045 * <property name="option" value="space"/> 046 * </module> 047 * </pre> 048 * @author Oliver Burn 049 * @version 1.0 050 */ 051public class TypecastParenPadCheck extends AbstractParenPadCheck 052{ 053 @Override 054 public int[] getRequiredTokens() 055 { 056 return new int[] {TokenTypes.RPAREN, TokenTypes.TYPECAST}; 057 } 058 059 @Override 060 public int[] getDefaultTokens() 061 { 062 return getRequiredTokens(); 063 } 064 065 @Override 066 public void visitToken(DetailAST ast) 067 { 068 // Strange logic in this method to guard against checking RPAREN tokens 069 // that are not associated with a TYPECAST token. 070 if (ast.getType() == TokenTypes.TYPECAST) { 071 processLeft(ast); 072 } 073 else if ((ast.getParent() != null) 074 && (ast.getParent().getType() == TokenTypes.TYPECAST) 075 && (ast.getParent().findFirstToken(TokenTypes.RPAREN) 076 == ast)) 077 { 078 processRight(ast); 079 } 080 } 081}