Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
NestedIfDepthCheck |
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| 2.0;2 |
1 | //////////////////////////////////////////////////////////////////////////////// | |
2 | // checkstyle: Checks Java source code for adherence to a set of rules. | |
3 | // Copyright (C) 2001-2014 Oliver Burn | |
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 | package com.puppycrawl.tools.checkstyle.checks.coding; | |
20 | ||
21 | import com.puppycrawl.tools.checkstyle.api.DetailAST; | |
22 | import com.puppycrawl.tools.checkstyle.api.TokenTypes; | |
23 | import com.puppycrawl.tools.checkstyle.checks.CheckUtils; | |
24 | ||
25 | /** | |
26 | * Restricts nested if-else blocks to a specified depth (default = 1). | |
27 | * | |
28 | * @author <a href="mailto:simon@redhillconsulting.com.au">Simon Harris</a> | |
29 | */ | |
30 | public final class NestedIfDepthCheck extends AbstractNestedDepthCheck | |
31 | { | |
32 | /** default allowed nesting depth. */ | |
33 | private static final int DEFAULT_MAX = 1; | |
34 | ||
35 | /** Creates new check instance with default allowed nesting depth. */ | |
36 | public NestedIfDepthCheck() | |
37 | { | |
38 | 2 | super(DEFAULT_MAX); |
39 | 2 | } |
40 | ||
41 | @Override | |
42 | public int[] getDefaultTokens() | |
43 | { | |
44 | 2 | return new int[] {TokenTypes.LITERAL_IF}; |
45 | } | |
46 | ||
47 | @Override | |
48 | public void visitToken(DetailAST aAST) | |
49 | { | |
50 | 34 | switch (aAST.getType()) { |
51 | case TokenTypes.LITERAL_IF: | |
52 | 34 | visitLiteralIf(aAST); |
53 | 34 | break; |
54 | default: | |
55 | 0 | throw new IllegalStateException(aAST.toString()); |
56 | } | |
57 | 34 | } |
58 | ||
59 | @Override | |
60 | public void leaveToken(DetailAST aAST) | |
61 | { | |
62 | 34 | switch (aAST.getType()) { |
63 | case TokenTypes.LITERAL_IF: | |
64 | 34 | leaveLiteralIf(aAST); |
65 | 34 | break; |
66 | default: | |
67 | 0 | throw new IllegalStateException(aAST.toString()); |
68 | } | |
69 | 34 | } |
70 | ||
71 | /** | |
72 | * Increases current nesting depth. | |
73 | * @param aIf node for if. | |
74 | */ | |
75 | private void visitLiteralIf(DetailAST aIf) | |
76 | { | |
77 | 34 | if (!CheckUtils.isElseIf(aIf)) { |
78 | 26 | nestIn(aIf, "nested.if.depth"); |
79 | } | |
80 | 34 | } |
81 | ||
82 | /** | |
83 | * Decreases current nesting depth. | |
84 | * @param aIf node for if. | |
85 | */ | |
86 | private void leaveLiteralIf(DetailAST aIf) | |
87 | { | |
88 | 34 | if (!CheckUtils.isElseIf(aIf)) { |
89 | 26 | nestOut(); |
90 | } | |
91 | 34 | } |
92 | } |