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