Source code: com/puppycrawl/tools/checkstyle/checks/indentation/AssignHandler.java
1 ////////////////////////////////////////////////////////////////////////////////
2 // checkstyle: Checks Java source code for adherence to a set of rules.
3 // Copyright (C) 2001-2003 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 assignements.
26 *
27 * @author o_sukhodolsky
28 */
29 public class AssignHandler 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 AssignHandler(IndentationCheck aIndentCheck,
40 DetailAST aAst, ExpressionHandler aParent)
41 {
42 super(aIndentCheck, "assign", aAst, aParent);
43 }
44
45 /**
46 * Check the indentation of the expression we are handling.
47 */
48 public void checkIndentation()
49 {
50 IndentLevel expectedLevel = getChildrenExpectedLevel();
51
52 // check indentation of assign if it starts line
53 DetailAST assign = getMainAst();
54 if (startsLine(assign)
55 && !expectedLevel.accept(expandedTabsColumnNo(assign)))
56 {
57 logError(assign, "" , expandedTabsColumnNo(assign), expectedLevel);
58 }
59
60 // check indentation of rvalue
61 DetailAST child = (DetailAST) assign.getFirstChild();
62
63 // if this is assign in expression then skip first child,
64 // because it's lvalue.
65 if (assign.getParent() != null
66 && assign.getParent().getType() == TokenTypes.EXPR)
67 {
68 child = (DetailAST) child.getNextSibling();
69 }
70 checkExpressionSubtree(child, expectedLevel, false, true);
71 }
72
73 /**
74 * @return true if indentation should be increased after
75 * fisrt line in checkLinesIndent()
76 * false otherwise
77 */
78 protected boolean shouldIncreaseIndent()
79 {
80 return false;
81 }
82 }