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Java > Open Source Codes > com > puppycrawl > tools > checkstyle > checks > indentation > ObjectBlockHandler


1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2005 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.indentation;
20
21 import com.puppycrawl.tools.checkstyle.api.DetailAST;
22 import com.puppycrawl.tools.checkstyle.api.TokenTypes;
23
24 /**
25  * Handler for inner classes.
26  *
27  * @author jrichard
28  */
29 public class ObjectBlockHandler extends BlockParentHandler
30 {
31     /**
32      * Construct an instance of this handler with the given indentation check,
33      * abstract syntax tree, and parent handler.
34      *
35      * @param aIndentCheck the indentation check
36      * @param aAst the abstract syntax tree
37      * @param aParent the parent handler
38      */
39     public ObjectBlockHandler(IndentationCheck aIndentCheck,
40         DetailAST aAst, ExpressionHandler aParent)
41     {
42         super(aIndentCheck, "object def", aAst, aParent);
43     }
44
45     /**
46      * There is no top level expression for this handler.
47      *
48      * @return null
49      */
50     protected DetailAST getToplevelAST()
51     {
52         return null;
53     }
54
55     /**
56      * Get the left curly brace portion of the expression we are handling.
57      *
58      * @return the left curly brace expression
59      */
60     protected DetailAST getLCurly()
61     {
62         return getMainAst().findFirstToken(TokenTypes.LCURLY);
63     }
64
65     /**
66      * Get the right curly brace portion of the expression we are handling.
67      *
68      * @return the right curly brace expression
69      */
70     protected DetailAST getRCurly()
71     {
72         return getMainAst().findFirstToken(TokenTypes.RCURLY);
73     }
74
75     /**
76      * Get the child element representing the list of statements.
77      *
78      * @return the statement list child
79      */
80     protected DetailAST getListChild()
81     {
82         return getMainAst();
83     }
84
85     /**
86      * Compute the indentation amount for this handler.
87      *
88      * @return the expected indentation amount
89      */
90     protected IndentLevel getLevelImpl()
91     {
92         final DetailAST parentAST = getMainAst().getParent();
93         IndentLevel indent = getParent().getLevel();
94         if (parentAST.getType() == TokenTypes.LITERAL_NEW) {
95             indent.addAcceptedIndent(super.getLevelImpl());
96         }
97         else if (parentAST.getType() == TokenTypes.ENUM_CONSTANT_DEF) {
98             indent = super.getLevelImpl();
99         }
100         return indent;
101     }
102
103     /**
104      * Check the indentation of the expression we are handling.
105      */
106     public void checkIndentation()
107     {
108         // if we have a class or interface as a parent, don't do anything,
109 // as this is checked by class def; so
110 // only do this if we have a new for a parent (anonymous inner
111 // class)
112 final DetailAST parentAST = getMainAst().getParent();
113         if (parentAST.getType() != TokenTypes.LITERAL_NEW) {
114             return;
115         }
116
117         super.checkIndentation();
118     }
119 }
120
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