1 ///////////////////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code and other text files for adherence to a set of rules.
3 // Copyright (C) 2001-2025 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 switch statements.
28 *
29 */
30 public class SwitchHandler 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 SwitchHandler(IndentationCheck indentCheck,
41 DetailAST ast, AbstractExpressionHandler parent) {
42 super(indentCheck, "switch", ast, parent);
43 }
44
45 @Override
46 protected DetailAST getLeftCurly() {
47 return getMainAst().findFirstToken(TokenTypes.LCURLY);
48 }
49
50 @Override
51 protected DetailAST getRightCurly() {
52 return getMainAst().findFirstToken(TokenTypes.RCURLY);
53 }
54
55 @Override
56 protected DetailAST getListChild() {
57 // all children should be taken care of by case handler (plus
58 // there is no parent of just the cases, if checking is needed
59 // here in the future, an additional way beyond checkChildren()
60 // will have to be devised to get children)
61 return null;
62 }
63
64 @Override
65 protected DetailAST getNonListChild() {
66 return null;
67 }
68
69 /**
70 * Check the indentation of the switch expression.
71 */
72 private void checkSwitchExpr() {
73 checkExpressionSubtree(
74 getMainAst().findFirstToken(TokenTypes.LPAREN).getNextSibling(),
75 getIndent(),
76 false,
77 false);
78 }
79
80 @Override
81 protected IndentLevel getIndentImpl() {
82 IndentLevel indentLevel = super.getIndentImpl();
83 // if switch is starting the line
84 if (isOnStartOfLine(getMainAst())
85 && TokenUtil.isOfType(getMainAst().getParent().getParent(), TokenTypes.ASSIGN)) {
86 indentLevel = new IndentLevel(indentLevel,
87 getIndentCheck().getLineWrappingIndentation());
88 }
89 return indentLevel;
90 }
91
92 @Override
93 public void checkIndentation() {
94 checkSwitchExpr();
95 super.checkIndentation();
96 }
97
98 }