KickJava   Java API By Example, From Geeks To Geeks.

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


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 operator new.
26  *
27  * @author o_sukhodolsky
28  */
29 public class NewHandler extends ExpressionHandler
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 NewHandler(IndentationCheck aIndentCheck,
40                       DetailAST aAST,
41                       ExpressionHandler aParent)
42     {
43         super(aIndentCheck, "operator new", aAST, aParent);
44     }
45
46     /** {@inheritDoc} */
47     public void checkIndentation()
48     {
49         final DetailAST type = (DetailAST) getMainAst().getFirstChild();
50         checkExpressionSubtree(type, getLevel(), false, false);
51
52         final DetailAST lparen = getMainAst().findFirstToken(TokenTypes.LPAREN);
53         final DetailAST rparen = getMainAst().findFirstToken(TokenTypes.RPAREN);
54         checkLParen(lparen);
55
56         if ((rparen == null) || (lparen == null)
57             || (rparen.getLineNo() == lparen.getLineNo()))
58         {
59             return;
60         }
61
62         // if this method name is on the same line as a containing
63 // method, don't indent, this allows expressions like:
64 // method("my str" + method2(
65 // "my str2"));
66 // as well as
67 // method("my str" +
68 // method2(
69 // "my str2"));
70 //
71
72         checkExpressionSubtree(
73             getMainAst().findFirstToken(TokenTypes.ELIST),
74             new IndentLevel(getLevel(), getBasicOffset()),
75             false, true);
76
77         checkRParen(lparen, rparen);
78     }
79
80     /** {@inheritDoc} */
81     protected IndentLevel getLevelImpl()
82     {
83         // if our expression isn't first on the line, just use the start
84 // of the line
85 if (getLineStart(getMainAst()) != getMainAst().getColumnNo()) {
86             return new IndentLevel(getLineStart(getMainAst()));
87         }
88         return super.getLevelImpl();
89     }
90
91     /** {@inheritDoc} */
92     protected boolean shouldIncreaseIndent()
93     {
94         return false;
95     }
96 }
97
Popular Tags