Coverage Report - com.puppycrawl.tools.checkstyle.checks.coding.EmptyStatementCheck
 
Classes in this File Line Coverage Branch Coverage Complexity
EmptyStatementCheck
100%
6/6
N/A
1
 
 1  
 ////////////////////////////////////////////////////////////////////////////////
 2  
 // checkstyle: Checks Java source code for adherence to a set of rules.
 3  
 // Copyright (C) 2001-2017 the original author or authors.
 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.StatelessCheck;
 23  
 import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
 24  
 import com.puppycrawl.tools.checkstyle.api.DetailAST;
 25  
 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
 26  
 
 27  
 /**
 28  
  * <p>
 29  
  * Detects empty statements (standalone ';').
 30  
  * Empty statements often introduce bugs
 31  
  * that are hard to spot, such as in
 32  
  * </p>
 33  
  * <pre>
 34  
  * if (someCondition);
 35  
  *   doConditionalStuff();
 36  
  * doUnconditionalStuff();
 37  
  * </pre>
 38  
  * <p>
 39  
  * An example of how to configure the check is:
 40  
  * </p>
 41  
  * <pre>
 42  
  * &lt;module name="EmptyStatement"/&gt;
 43  
  * </pre>
 44  
  * @author Rick Giles
 45  
  */
 46  
 @StatelessCheck
 47  9
 public class EmptyStatementCheck extends AbstractCheck {
 48  
 
 49  
     /**
 50  
      * A key is pointing to the warning message text in "messages.properties"
 51  
      * file.
 52  
      */
 53  
     public static final String MSG_KEY = "empty.statement";
 54  
 
 55  
     @Override
 56  
     public int[] getDefaultTokens() {
 57  11
         return getRequiredTokens();
 58  
     }
 59  
 
 60  
     @Override
 61  
     public int[] getAcceptableTokens() {
 62  5
         return getRequiredTokens();
 63  
     }
 64  
 
 65  
     @Override
 66  
     public int[] getRequiredTokens() {
 67  27
         return new int[] {TokenTypes.EMPTY_STAT};
 68  
     }
 69  
 
 70  
     @Override
 71  
     public void visitToken(DetailAST ast) {
 72  16
         log(ast.getLineNo(), ast.getColumnNo(), MSG_KEY);
 73  16
     }
 74  
 }