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

 // 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.DetailAST;

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

 /**

  * Restricts nested try-catch-finally blocks to a specified depth (default = 1).

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

  */

 public final class NestedTryDepthCheck extends AbstractNestedDepthCheck

 {

     /** default allowed nesting depth */

     private static final int DEFAULT_MAX = 1;

     /** Creates new check instance with default allowed nesting depth. */

     public NestedTryDepthCheck()

     {

         super(DEFAULT_MAX);

     }

     @Override

     public int[] getDefaultTokens()

     {

         return new int[] {TokenTypes.LITERAL_TRY};

     }

     @Override

     public void visitToken(DetailAST aAST)

     {

         switch (aAST.getType()) {

         case TokenTypes.LITERAL_TRY:

             visitLiteralTry(aAST);

             break;

         default:

             throw new IllegalStateException(aAST.toString());

         }

     }

     @Override

     public void leaveToken(DetailAST aAST)

     {

         switch (aAST.getType()) {

         case TokenTypes.LITERAL_TRY:

             leaveLiteralTry();

             break;

         default:

             throw new IllegalStateException(aAST.toString());

         }

     }

     /**

      * Increases current nesting depth.

      * @param aTry node for try.

      */

     private void visitLiteralTry(DetailAST aTry)

     {

         nestIn(aTry, "nested.try.depth");

     }

     /** Decreases current nesting depth */

     private void leaveLiteralTry()

     {

         nestOut();

     }

 }