Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
JavaFXTreePathScanner |
|
| 0.0;0 |
1 | /* | |
2 | * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. | |
3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 | * | |
5 | * This code is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 only, as | |
7 | * published by the Free Software Foundation. Sun designates this | |
8 | * particular file as subject to the "Classpath" exception as provided | |
9 | * by Sun in the LICENSE file that accompanied this code. | |
10 | * | |
11 | * This code is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * version 2 for more details (a copy is included in the LICENSE file that | |
15 | * accompanied this code). | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License version | |
18 | * 2 along with this work; if not, write to the Free Software Foundation, | |
19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
20 | * | |
21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
22 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
23 | * have any questions. | |
24 | */ | |
25 | ||
26 | package com.sun.javafx.api.tree; | |
27 | ||
28 | import com.sun.source.tree.*; | |
29 | import com.sun.source.util.TreePath; | |
30 | ||
31 | /** | |
32 | * A TreeVisitor that visits all the child tree nodes, and provides | |
33 | * support for maintaining a path for the parent nodes. | |
34 | * To visit nodes of a particular type, just override the | |
35 | * corresponding visitorXYZ method. | |
36 | * Inside your method, call super.visitXYZ to visit descendant | |
37 | * nodes. | |
38 | * | |
39 | * @author Jonathan Gibbons | |
40 | * @since 1.6 | |
41 | */ | |
42 | 3 | public class JavaFXTreePathScanner<R, P> extends JavaFXTreeScanner<R, P> { |
43 | ||
44 | /** | |
45 | * Scan a tree from a position identified by a TreePath. | |
46 | */ | |
47 | public R scan(TreePath path, P p) { | |
48 | 2 | this.path = path; |
49 | try { | |
50 | 2 | return path.getLeaf().accept(this, p); |
51 | } finally { | |
52 | 0 | this.path = null; |
53 | } | |
54 | } | |
55 | ||
56 | /** | |
57 | * Scan a single node. | |
58 | * The current path is updated for the duration of the scan. | |
59 | */ | |
60 | @Override | |
61 | public R scan(Tree tree, P p) { | |
62 | 70 | if (tree == null) |
63 | 14 | return null; |
64 | ||
65 | 56 | TreePath prev = path; |
66 | 56 | path = new TreePath(path, tree); |
67 | try { | |
68 | 56 | return tree.accept(this, p); |
69 | } finally { | |
70 | 55 | path = prev; |
71 | } | |
72 | } | |
73 | ||
74 | /** | |
75 | * Get the current path for the node, as built up by the currently | |
76 | * active set of scan calls. | |
77 | */ | |
78 | public TreePath getCurrentPath() { | |
79 | 4 | return path; |
80 | } | |
81 | ||
82 | private TreePath path; | |
83 | } |