1 //////////////////////////////////////////////////////////////////////////////// 2 // checkstyle: Checks Java source code for adherence to a set of rules. 3 // Copyright (C) 2001-2014 Oliver Burn 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 package com.puppycrawl.tools.checkstyle.checks.whitespace; 20 21 import com.puppycrawl.tools.checkstyle.api.Check; 22 import com.puppycrawl.tools.checkstyle.api.TokenTypes; 23 import com.puppycrawl.tools.checkstyle.api.DetailAST; 24 25 /** 26 * <p> 27 * Checks that a token is followed by whitespace, with the exception that it 28 * does not check for whitespace after the semicolon of an empty for iterator. 29 * Use Check {@link EmptyForIteratorPadCheck EmptyForIteratorPad} to validate 30 * empty for iterators. 31 * </p> 32 * <p> By default the check will check the following tokens: 33 * {@link TokenTypes#COMMA COMMA}, 34 * {@link TokenTypes#SEMI SEMI}, 35 * {@link TokenTypes#TYPECAST TYPECAST}. 36 * </p> 37 * <p> 38 * An example of how to configure the check is: 39 * </p> 40 * <pre> 41 * <module name="WhitespaceAfter"/> 42 * </pre> 43 * <p> An example of how to configure the check for whitespace only after 44 * {@link TokenTypes#COMMA COMMA} and {@link TokenTypes#SEMI SEMI} tokens is: 45 * </p> 46 * <pre> 47 * <module name="WhitespaceAfter"> 48 * <property name="tokens" value="COMMA, SEMI"/> 49 * </module> 50 * </pre> 51 * @author Oliver Burn 52 * @author Rick Giles 53 * @version 1.0 54 */ 55 public class WhitespaceAfterCheck 56 extends Check 57 { 58 @Override 59 public int[] getDefaultTokens() 60 { 61 return new int[] { 62 TokenTypes.COMMA, 63 TokenTypes.SEMI, 64 TokenTypes.TYPECAST, 65 }; 66 } 67 68 @Override 69 public void visitToken(DetailAST ast) 70 { 71 final Object[] message; 72 final DetailAST targetAST; 73 if (ast.getType() == TokenTypes.TYPECAST) { 74 targetAST = ast.findFirstToken(TokenTypes.RPAREN); 75 // TODO: i18n 76 message = new Object[]{"cast"}; 77 } 78 else { 79 targetAST = ast; 80 message = new Object[]{ast.getText()}; 81 } 82 final String line = getLine(targetAST.getLineNo() - 1); 83 final int after = 84 targetAST.getColumnNo() + targetAST.getText().length(); 85 86 if (after < line.length()) { 87 88 final char charAfter = line.charAt(after); 89 if ((targetAST.getType() == TokenTypes.SEMI) 90 && ((charAfter == ';') || (charAfter == ')'))) 91 { 92 return; 93 } 94 if (!Character.isWhitespace(charAfter)) { 95 //empty FOR_ITERATOR? 96 if (targetAST.getType() == TokenTypes.SEMI) { 97 final DetailAST sibling = 98 targetAST.getNextSibling(); 99 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 }