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 switch statements.
026 *
027 * @author jrichard
028 */
029public class SwitchHandler 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 SwitchHandler(IndentationCheck indentCheck,
040        DetailAST ast, ExpressionHandler parent)
041    {
042        super(indentCheck, "switch", ast, parent);
043    }
044
045    @Override
046    protected DetailAST getLCurly()
047    {
048        return getMainAst().findFirstToken(TokenTypes.LCURLY);
049    }
050
051    @Override
052    protected DetailAST getRCurly()
053    {
054        return getMainAst().findFirstToken(TokenTypes.RCURLY);
055    }
056
057    @Override
058    protected DetailAST getListChild()
059    {
060        // all children should be taken care of by case handler (plus
061        // there is no parent of just the cases, if checking is needed
062        // here in the future, an additional way beyond checkChildren()
063        // will have to be devised to get children)
064        return null;
065    }
066
067    @Override
068    protected DetailAST getNonlistChild()
069    {
070        return null;
071    }
072
073    /**
074     * Check the indentation of the switch expression.
075     */
076    private void checkSwitchExpr()
077    {
078        checkExpressionSubtree(
079            getMainAst().findFirstToken(TokenTypes.LPAREN).
080                getNextSibling(),
081            getLevel(),
082            false,
083            false);
084    }
085
086    @Override
087    public void checkIndentation()
088    {
089        checkSwitchExpr();
090        super.checkIndentation();
091    }
092}