001////////////////////////////////////////////////////////////////////////////////
002// checkstyle: Checks Java source code for adherence to a set of rules.
003// Copyright (C) 2001-2021 the original author or authors.
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////////////////////////////////////////////////////////////////////////////////
019
020package com.puppycrawl.tools.checkstyle.checks.indentation;
021
022import com.puppycrawl.tools.checkstyle.api.DetailAST;
023import com.puppycrawl.tools.checkstyle.api.TokenTypes;
024
025/**
026 * Handler for switch statements.
027 *
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, AbstractExpressionHandler parent) {
041        super(indentCheck, "switch", ast, parent);
042    }
043
044    @Override
045    protected DetailAST getLeftCurly() {
046        return getMainAst().findFirstToken(TokenTypes.LCURLY);
047    }
048
049    @Override
050    protected DetailAST getRightCurly() {
051        return getMainAst().findFirstToken(TokenTypes.RCURLY);
052    }
053
054    @Override
055    protected DetailAST getListChild() {
056        // all children should be taken care of by case handler (plus
057        // there is no parent of just the cases, if checking is needed
058        // here in the future, an additional way beyond checkChildren()
059        // will have to be devised to get children)
060        return null;
061    }
062
063    @Override
064    protected DetailAST getNonListChild() {
065        return null;
066    }
067
068    /**
069     * Check the indentation of the switch expression.
070     */
071    private void checkSwitchExpr() {
072        checkExpressionSubtree(
073            getMainAst().findFirstToken(TokenTypes.LPAREN).getNextSibling(),
074            getIndent(),
075            false,
076            false);
077    }
078
079    @Override
080    public void checkIndentation() {
081        checkSwitchExpr();
082        super.checkIndentation();
083    }
084
085}