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

 // 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.coding;

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

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

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

 /**

  * <p>

  * Checks if array initialization contains optional trailing comma.

  * </p>

  * <p>

  * Rationale: Putting this comma in make is easier to change the

  * order of the elements or add new elements on the end.

  * </p>

  * <p>

  * An example of how to configure the check is:

  * </p>

  * <pre>

  * <module name="ArrayTrailingComma"/>

  * </pre>

  * @author o_sukhodolsky

  */

 public class ArrayTrailingCommaCheck extends Check

 {

     @Override

     public int[] getDefaultTokens()

     {

         return new int[] {TokenTypes.ARRAY_INIT};

     }

     @Override

     public void visitToken(DetailAST aArrayInit)

     {

         final DetailAST rcurly = aArrayInit.findFirstToken(TokenTypes.RCURLY);

         // if curlys are on the same line

         // or array is empty then check nothing

         if ((aArrayInit.getLineNo() == rcurly.getLineNo())

             || (aArrayInit.getChildCount() == 1))

         {

             return;

         }

         final DetailAST prev = rcurly.getPreviousSibling();

         if (prev.getType() != TokenTypes.COMMA) {

             log(rcurly.getLineNo(), "array.trailing.comma");

         }

     }

 }