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 }