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

 // 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.indentation;

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

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

 /**

  * Handler for assignements.

  *

  * @author o_sukhodolsky

  */

 public class AssignHandler extends BlockParentHandler

 {

     /**

      * Construct an instance of this handler with the given indentation check,

      * abstract syntax tree, and parent handler.

      *

      * @param aIndentCheck   the indentation check

      * @param aAst           the abstract syntax tree

      * @param aParent        the parent handler

      */

     public AssignHandler(IndentationCheck aIndentCheck,

         DetailAST aAst, ExpressionHandler aParent)

     {

         super(aIndentCheck, "assign", aAst, aParent);

     }

     @Override

     public void checkIndentation()

     {

         final IndentLevel expectedLevel = getChildrenExpectedLevel();

         // check indentation of assign if it starts line

         final DetailAST assign = getMainAst();

         if (startsLine(assign)

             && !expectedLevel.accept(expandedTabsColumnNo(assign)))

         {

             logError(assign, "" , expandedTabsColumnNo(assign), expectedLevel);

         }

         // check indentation of rvalue

         DetailAST child = assign.getFirstChild();

         // if this is assign in expression then skip first child,

         // because it's lvalue.

         final DetailAST parent = assign.getParent();

         if ((parent != null) && (parent.getType() == TokenTypes.EXPR)) {

             child = child.getNextSibling();

         }

         if ((parent != null)

             && (parent.getType() == TokenTypes.ANNOTATION_MEMBER_VALUE_PAIR))

         {

             child = assign.getNextSibling();

         }

         checkExpressionSubtree(child, expectedLevel, false, true);

     }

     @Override

     protected boolean shouldIncreaseIndent()

     {

         return false;

     }

     @Override

     public IndentLevel suggestedChildLevel(ExpressionHandler aChild)

     {

         final DetailAST assign = getMainAst();

         final DetailAST child = aChild.getMainAst();

         if (child == assign.getFirstChild()) {

             // left side of assignment should have the same

             // indentation as "assignment"

             return getLevel();

         }

         if (startsLine(assign)) {

             return new IndentLevel(expandedTabsColumnNo(assign));

         }

         return super.suggestedChildLevel(aChild);

     }

 }