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Java > Open Source Codes > com > puppycrawl > tools > checkstyle > checks > coding > EmptyStatementCheck


1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2005 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
20 package com.puppycrawl.tools.checkstyle.checks.coding;
21
22 import com.puppycrawl.tools.checkstyle.api.Check;
23 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
24 import com.puppycrawl.tools.checkstyle.api.DetailAST;
25
26 /**
27  * <p>
28  * Detects empty statements (standalone ';').
29  * Empty statements often introduce bugs
30  * that are hard to spot, such as in
31  * </p>
32  * <pre>
33  * if (someCondition);
34  * doConditionalStuff();
35  * doUnconditionalStuff();
36  * </pre>
37  * <p>
38  * An example of how to configure the check is:
39  * </p>
40  * <pre>
41  * &lt;module name="EmptyStatement"/&gt;
42  * </pre>
43  * @author Rick Giles
44  * @version 1.0
45  */
46 public class EmptyStatementCheck extends Check
47 {
48     /** {@inheritDoc} */
49     public int[] getDefaultTokens()
50     {
51         return new int[] {TokenTypes.EMPTY_STAT};
52     }
53
54     /** {@inheritDoc} */
55     public void visitToken(DetailAST aAST)
56     {
57         log(aAST.getLineNo(), aAST.getColumnNo(), "empty.statement");
58     }
59 }
60
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