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


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 catch blocks.
26  *
27  * @author jrichard
28  */
29 public class CatchHandler 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 CatchHandler(IndentationCheck aIndentCheck,
40         DetailAST aAst, ExpressionHandler aParent)
41     {
42         super(aIndentCheck, "catch", aAst, aParent);
43     }
44
45     /**
46      * Determines if the top level token must start the line.
47      *
48      * @return false
49      */
50     protected boolean toplevelMustStartLine()
51     {
52         return false;
53     }
54
55     /**
56      * Check the indentation level of the conditional expression.
57      */
58     private void checkCondExpr()
59     {
60         final DetailAST condAst = (DetailAST)
61             getMainAst().findFirstToken(TokenTypes.LPAREN).getNextSibling();
62         checkExpressionSubtree(condAst, getLevel(), false, false);
63     }
64
65     /**
66      * Check the indentation of the expression we are handling.
67      */
68     public void checkIndentation()
69     {
70         super.checkIndentation();
71         checkCondExpr();
72     }
73 }
74
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