001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2014  Oliver Burn
004//
005// This library is free software; you can redistribute it and/or
006// modify it under the terms of the GNU Lesser General Public
007// License as published by the Free Software Foundation; either
008// version 2.1 of the License, or (at your option) any later version.
009//
010// This library is distributed in the hope that it will be useful,
011// but WITHOUT ANY WARRANTY; without even the implied warranty of
012// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013// Lesser General Public License for more details.
014//
015// You should have received a copy of the GNU Lesser General Public
016// License along with this library; if not, write to the Free Software
017// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
018////////////////////////////////////////////////////////////////////////////////
019package com.puppycrawl.tools.checkstyle.checks.indentation;
020
021import com.puppycrawl.tools.checkstyle.api.DetailAST;
022import com.puppycrawl.tools.checkstyle.api.TokenTypes;
023
024/**
025 * Handler for else blocks.
026 *
027 * @author jrichard
028 */
029public class ElseHandler extends BlockParentHandler
030{
031    /**
032     * Construct an instance of this handler with the given indentation check,
033     * abstract syntax tree, and parent handler.
034     *
035     * @param indentCheck   the indentation check
036     * @param ast           the abstract syntax tree
037     * @param parent        the parent handler
038     */
039    public ElseHandler(IndentationCheck indentCheck,
040        DetailAST ast, ExpressionHandler parent)
041    {
042        super(indentCheck, "else", ast, parent);
043    }
044
045    @Override
046    protected void checkToplevelToken()
047    {
048        // check if else is nested with rcurly of if:
049        //
050        //  } else ...
051
052        final DetailAST ifAST = getMainAst().getParent();
053        if (ifAST != null) {
054            final DetailAST slist = ifAST.findFirstToken(TokenTypes.SLIST);
055            if (slist != null) {
056                final DetailAST lcurly = slist.getLastChild();
057                if ((lcurly != null)
058                    && (lcurly.getLineNo() == getMainAst().getLineNo()))
059                {
060                    // indentation checked as part of LITERAL IF check
061                    return;
062                }
063            }
064        }
065        super.checkToplevelToken();
066    }
067
068    @Override
069    protected DetailAST getNonlistChild()
070    {
071        return getMainAst().getFirstChild();
072    }
073}