1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2024 the original author or authors.
4 //
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Lesser General Public
7 // License as published by the Free Software Foundation; either
8 // version 2.1 of the License, or (at your option) any later version.
9 //
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Lesser General Public License for more details.
14 //
15 // You should have received a copy of the GNU Lesser General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 ///////////////////////////////////////////////////////////////////////////////////////////////
19
20 package com.puppycrawl.tools.checkstyle.checks.indentation;
21
22 import com.puppycrawl.tools.checkstyle.api.DetailAST;
23 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
24 import com.puppycrawl.tools.checkstyle.utils.TokenUtil;
25
26 /**
27 * Handler for else blocks.
28 *
29 */
30 public class ElseHandler extends BlockParentHandler {
31
32 /**
33 * Construct an instance of this handler with the given indentation check,
34 * abstract syntax tree, and parent handler.
35 *
36 * @param indentCheck the indentation check
37 * @param ast the abstract syntax tree
38 * @param parent the parent handler
39 */
40 public ElseHandler(IndentationCheck indentCheck,
41 DetailAST ast, AbstractExpressionHandler parent) {
42 super(indentCheck, "else", ast, parent);
43 }
44
45 @Override
46 protected void checkTopLevelToken() {
47 // check if else is nested with rcurly of if:
48 //
49 // } else ...
50
51 final DetailAST ifAST = getMainAst().getParent();
52 final DetailAST slist = ifAST.findFirstToken(TokenTypes.SLIST);
53 if (slist == null) {
54 super.checkTopLevelToken();
55 }
56 else {
57 final DetailAST lcurly = slist.getLastChild();
58 // indentation checked as part of LITERAL IF check
59 if (!TokenUtil.areOnSameLine(lcurly, getMainAst())) {
60 super.checkTopLevelToken();
61 }
62 }
63 }
64
65 @Override
66 protected DetailAST getNonListChild() {
67 return getMainAst().getFirstChild();
68 }
69
70 }