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 case statements.
026 *
027 * @author jrichard
028 */
029public class CaseHandler extends ExpressionHandler
030{
031    /**
032     * The child elements of a case expression.
033     */
034    private static final int[] CASE_CHILDREN = new int[] {
035        TokenTypes.LITERAL_CASE,
036        TokenTypes.LITERAL_DEFAULT,
037    };
038
039    /**
040     * Construct an instance of this handler with the given indentation check,
041     * abstract syntax tree, and parent handler.
042     *
043     * @param indentCheck   the indentation check
044     * @param expr          the abstract syntax tree
045     * @param parent        the parent handler
046     */
047    public CaseHandler(IndentationCheck indentCheck,
048        DetailAST expr, ExpressionHandler parent)
049    {
050        super(indentCheck, "case", expr, parent);
051    }
052
053    @Override
054    protected IndentLevel getLevelImpl()
055    {
056        return new IndentLevel(getParent().getLevel(),
057                               getIndentCheck().getCaseIndent());
058    }
059
060    /**
061     * Check the indentation of the case statement.
062     */
063    private void checkCase()
064    {
065        checkChildren(getMainAst(), CASE_CHILDREN, getLevel(), true, false);
066    }
067
068    @Override
069    public IndentLevel suggestedChildLevel(ExpressionHandler child)
070    {
071        return getLevel();
072    }
073
074    @Override
075    public void checkIndentation()
076    {
077        checkCase();
078    }
079}