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

 // 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;

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

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

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

 /**

  * <p>Checks that long constants are defined with an upper ell.

  * That is <span class="code">'L'</span> and not

  * <span class="code">'l'</span>. This is in accordance to the Java Language

  * Specification, <a href=

 "http://java.sun.com/docs/books/jls/second_edition/html/lexical.doc.html#48282"

  * >Section 3.10.1</a>.

  * </p>

  * <p>

  * Rationale: The letter <span class="code">l</span> looks a lot

  * like the number <span class="code">1</span>.

  * </p>

  * <h4>Examples</h4>

  * <p class="body">

  * To configure the check:

  *

  * </p>

  * <pre class="body">

  * <module name="UpperEll"/>

  * </pre>

  *

  * @author Oliver Burn

  * @version 1.0

  */

 public class UpperEllCheck extends Check

 {

     @Override

     public int[] getDefaultTokens()

     {

         return new int[] {TokenTypes.NUM_LONG};

     }

     @Override

     public void visitToken(DetailAST aAST)

     {

         if (aAST.getText().endsWith("l")) {

             log(aAST.getLineNo(),

                 aAST.getColumnNo() + aAST.getText().length() - 1,

                 "upperEll");

         }

     }

 }