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.Check; 022import com.puppycrawl.tools.checkstyle.api.TokenTypes; 023import com.puppycrawl.tools.checkstyle.api.DetailAST; 024 025/** 026 * <p> 027 * Checks that a token is followed by whitespace, with the exception that it 028 * does not check for whitespace after the semicolon of an empty for iterator. 029 * Use Check {@link EmptyForIteratorPadCheck EmptyForIteratorPad} to validate 030 * empty for iterators. 031 * </p> 032 * <p> By default the check will check the following tokens: 033 * {@link TokenTypes#COMMA COMMA}, 034 * {@link TokenTypes#SEMI SEMI}, 035 * {@link TokenTypes#TYPECAST TYPECAST}. 036 * </p> 037 * <p> 038 * An example of how to configure the check is: 039 * </p> 040 * <pre> 041 * <module name="WhitespaceAfter"/> 042 * </pre> 043 * <p> An example of how to configure the check for whitespace only after 044 * {@link TokenTypes#COMMA COMMA} and {@link TokenTypes#SEMI SEMI} tokens is: 045 * </p> 046 * <pre> 047 * <module name="WhitespaceAfter"> 048 * <property name="tokens" value="COMMA, SEMI"/> 049 * </module> 050 * </pre> 051 * @author Oliver Burn 052 * @author Rick Giles 053 * @version 1.0 054 */ 055public class WhitespaceAfterCheck 056 extends Check 057{ 058 @Override 059 public int[] getDefaultTokens() 060 { 061 return new int[] { 062 TokenTypes.COMMA, 063 TokenTypes.SEMI, 064 TokenTypes.TYPECAST, 065 }; 066 } 067 068 @Override 069 public void visitToken(DetailAST ast) 070 { 071 final Object[] message; 072 final DetailAST targetAST; 073 if (ast.getType() == TokenTypes.TYPECAST) { 074 targetAST = ast.findFirstToken(TokenTypes.RPAREN); 075 // TODO: i18n 076 message = new Object[]{"cast"}; 077 } 078 else { 079 targetAST = ast; 080 message = new Object[]{ast.getText()}; 081 } 082 final String line = getLine(targetAST.getLineNo() - 1); 083 final int after = 084 targetAST.getColumnNo() + targetAST.getText().length(); 085 086 if (after < line.length()) { 087 088 final char charAfter = line.charAt(after); 089 if ((targetAST.getType() == TokenTypes.SEMI) 090 && ((charAfter == ';') || (charAfter == ')'))) 091 { 092 return; 093 } 094 if (!Character.isWhitespace(charAfter)) { 095 //empty FOR_ITERATOR? 096 if (targetAST.getType() == TokenTypes.SEMI) { 097 final DetailAST sibling = 098 targetAST.getNextSibling(); 099 if ((sibling != null) 100 && (sibling.getType() == TokenTypes.FOR_ITERATOR) 101 && (sibling.getChildCount() == 0)) 102 { 103 return; 104 } 105 } 106 log(targetAST.getLineNo(), 107 targetAST.getColumnNo() + targetAST.getText().length(), 108 "ws.notFollowed", 109 message); 110 } 111 } 112 } 113}