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; 024import com.puppycrawl.tools.checkstyle.utils.TokenUtil; 025 026/** 027 * Handler for else blocks. 028 * 029 */ 030public class ElseHandler extends BlockParentHandler { 031 032 /** 033 * Construct an instance of this handler with the given indentation check, 034 * abstract syntax tree, and parent handler. 035 * 036 * @param indentCheck the indentation check 037 * @param ast the abstract syntax tree 038 * @param parent the parent handler 039 */ 040 public ElseHandler(IndentationCheck indentCheck, 041 DetailAST ast, AbstractExpressionHandler parent) { 042 super(indentCheck, "else", ast, parent); 043 } 044 045 @Override 046 protected void checkTopLevelToken() { 047 // check if else is nested with rcurly of if: 048 // 049 // } else ... 050 051 final DetailAST ifAST = getMainAst().getParent(); 052 final DetailAST slist = ifAST.findFirstToken(TokenTypes.SLIST); 053 if (slist == null) { 054 super.checkTopLevelToken(); 055 } 056 else { 057 final DetailAST lcurly = slist.getLastChild(); 058 // indentation checked as part of LITERAL IF check 059 if (!TokenUtil.areOnSameLine(lcurly, getMainAst())) { 060 super.checkTopLevelToken(); 061 } 062 } 063 } 064 065 @Override 066 protected DetailAST getNonListChild() { 067 return getMainAst().getFirstChild(); 068 } 069 070}