001/////////////////////////////////////////////////////////////////////////////////////////////// 002// checkstyle: Checks Java source code and other text files for adherence to a set of rules. 003// Copyright (C) 2001-2024 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}