////////////////////////////////////////////////////////////////////////////////

 // checkstyle: Checks Java source code for adherence to a set of rules.

 // Copyright (C) 2001-2014  Oliver Burn

 //

 // This library is free software; you can redistribute it and/or

 // modify it under the terms of the GNU Lesser General Public

 // License as published by the Free Software Foundation; either

 // version 2.1 of the License, or (at your option) any later version.

 //

 // This library is distributed in the hope that it will be useful,

 // but WITHOUT ANY WARRANTY; without even the implied warranty of

 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 // Lesser General Public License for more details.

 //

 // You should have received a copy of the GNU Lesser General Public

 // License along with this library; if not, write to the Free Software

 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 ////////////////////////////////////////////////////////////////////////////////

 package com.puppycrawl.tools.checkstyle.checks.metrics;

 import java.math.BigInteger;

 import com.puppycrawl.tools.checkstyle.api.DetailAST;

 import com.puppycrawl.tools.checkstyle.api.TokenTypes;

 /**

  * Checks cyclomatic complexity against a specified limit. The complexity is

  * measured by the number of "if", "while", "do", "for", "?:", "catch",

  * "switch", "case", "&&" and "||" statements (plus one) in the body of

  * the member. It is a measure of the minimum number of possible paths through

  * the source and therefore the number of required tests. Generally 1-4 is

  * considered good, 5-7 ok, 8-10 consider re-factoring, and 11+ re-factor now!

  *

  * @author <a href="mailto:simon@redhillconsulting.com.au">Simon Harris</a>

  * @author Oliver Burn

  */

 public class CyclomaticComplexityCheck

     extends AbstractComplexityCheck

 {

     /** default allowed complexity */

     private static final int DEFAULT_VALUE = 10;

     /** Create an instance. */

     public CyclomaticComplexityCheck()

     {

         super(DEFAULT_VALUE);

     }

     @Override

     public int[] getDefaultTokens()

     {

         return new int[] {

             TokenTypes.CTOR_DEF,

             TokenTypes.METHOD_DEF,

             TokenTypes.INSTANCE_INIT,

             TokenTypes.STATIC_INIT,

             TokenTypes.LITERAL_WHILE,

             TokenTypes.LITERAL_DO,

             TokenTypes.LITERAL_FOR,

             TokenTypes.LITERAL_IF,

             TokenTypes.LITERAL_CASE,

             TokenTypes.LITERAL_CATCH,

             TokenTypes.QUESTION,

             TokenTypes.LAND,

             TokenTypes.LOR,

         };

     }

     @Override

     protected final void visitTokenHook(DetailAST aAST)

     {

         incrementCurrentValue(BigInteger.ONE);

     }

     @Override

     protected final String getMessageID()

     {

         return "cyclomaticComplexity";

     }

 }