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

 // 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;

 import java.io.File;

 /**

  * Checks that the outer type name and the file name match.

  * @author Oliver Burn

  */

 public class OuterTypeFilenameCheck extends Check

 {

     /** indicates whether the first token has been seen in the file. */

     private boolean mSeenFirstToken;

     @Override

     public int[] getDefaultTokens()

     {

         return new int[] {

             TokenTypes.CLASS_DEF, TokenTypes.INTERFACE_DEF,

             TokenTypes.ENUM_DEF, TokenTypes.ANNOTATION_DEF,

         };

     }

     @Override

     public void beginTree(DetailAST aAST)

     {

         mSeenFirstToken = false;

     }

     @Override

     public void visitToken(DetailAST aAST)

     {

         // Only check first declaration

         if (mSeenFirstToken) {

             return;

         }

         mSeenFirstToken = true;

         final String outerTypeName =

             aAST.findFirstToken(TokenTypes.IDENT).getText();

         // Calculate the file name without the leading path or

         // the trailing .java suffix. Will be lax and just remove whatever

         // is after the '.' character.

         String fname = getFileContents().getFilename();

         fname = fname.substring(fname.lastIndexOf(File.separatorChar) + 1);

         fname = fname.replaceAll("\\.[^\\.]*$", "");

         if (!(fname.equals(outerTypeName))) {

             log(aAST.getLineNo(), "type.file.mismatch");

         }

     }

 }