Mercurial > jdk8-mips64-public > langtools / annotate
src/share/classes/com/sun/source/util/TreePathScanner.java@011cf7e0a148 (annotated)
src/share/classes/com/sun/source/util/TreePathScanner.java
Tue, 19 Feb 2013 00:31:45 -0800
- author
- darcy
- date
- Tue, 19 Feb 2013 00:31:45 -0800
- changeset 1590
- 011cf7e0a148
- parent 554
- 9d9f26857129
- child 2083
- 379c04c090cf
- permissions
- -rw-r--r--
8008267: Add @Supported annotation to com.sun.source types
Reviewed-by: jjg
| duke@1 | 1 | /* |
| darcy@1590 | 2 | * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved. |
| duke@1 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@1 | 4 | * |
| duke@1 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@1 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
| duke@1 | 8 | * particular file as subject to the "Classpath" exception as provided |
| ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
| duke@1 | 10 | * |
| duke@1 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@1 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@1 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@1 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@1 | 15 | * accompanied this code). |
| duke@1 | 16 | * |
| duke@1 | 17 | * You should have received a copy of the GNU General Public License version |
| duke@1 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@1 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@1 | 20 | * |
| ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
| ohair@554 | 23 | * questions. |
| duke@1 | 24 | */ |
| duke@1 | 25 | |
| duke@1 | 26 | package com.sun.source.util; |
| duke@1 | 27 | |
| duke@1 | 28 | import com.sun.source.tree.*; |
| duke@1 | 29 | |
| duke@1 | 30 | /** |
| duke@1 | 31 | * A TreeVisitor that visits all the child tree nodes, and provides |
| duke@1 | 32 | * support for maintaining a path for the parent nodes. |
| duke@1 | 33 | * To visit nodes of a particular type, just override the |
| duke@1 | 34 | * corresponding visitorXYZ method. |
| duke@1 | 35 | * Inside your method, call super.visitXYZ to visit descendant |
| duke@1 | 36 | * nodes. |
| duke@1 | 37 | * |
| duke@1 | 38 | * @author Jonathan Gibbons |
| duke@1 | 39 | * @since 1.6 |
| duke@1 | 40 | */ |
| darcy@1590 | 41 | @jdk.Supported |
| duke@1 | 42 | public class TreePathScanner<R, P> extends TreeScanner<R, P> { |
| duke@1 | 43 | |
| duke@1 | 44 | /** |
| duke@1 | 45 | * Scan a tree from a position identified by a TreePath. |
| duke@1 | 46 | */ |
| duke@1 | 47 | public R scan(TreePath path, P p) { |
| duke@1 | 48 | this.path = path; |
| duke@1 | 49 | try { |
| duke@1 | 50 | return path.getLeaf().accept(this, p); |
| duke@1 | 51 | } finally { |
| duke@1 | 52 | this.path = null; |
| duke@1 | 53 | } |
| duke@1 | 54 | } |
| duke@1 | 55 | |
| duke@1 | 56 | /** |
| duke@1 | 57 | * Scan a single node. |
| duke@1 | 58 | * The current path is updated for the duration of the scan. |
| duke@1 | 59 | */ |
| duke@1 | 60 | @Override |
| duke@1 | 61 | public R scan(Tree tree, P p) { |
| duke@1 | 62 | if (tree == null) |
| duke@1 | 63 | return null; |
| duke@1 | 64 | |
| duke@1 | 65 | TreePath prev = path; |
| duke@1 | 66 | path = new TreePath(path, tree); |
| duke@1 | 67 | try { |
| duke@1 | 68 | return tree.accept(this, p); |
| duke@1 | 69 | } finally { |
| duke@1 | 70 | path = prev; |
| duke@1 | 71 | } |
| duke@1 | 72 | } |
| duke@1 | 73 | |
| duke@1 | 74 | /** |
| duke@1 | 75 | * Get the current path for the node, as built up by the currently |
| duke@1 | 76 | * active set of scan calls. |
| duke@1 | 77 | */ |
| duke@1 | 78 | public TreePath getCurrentPath() { |
| duke@1 | 79 | return path; |
| duke@1 | 80 | } |
| duke@1 | 81 | |
| duke@1 | 82 | private TreePath path; |
| duke@1 | 83 | } |
