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}