|
1 /* |
|
2 * Copyright (c) 2016, Oracle and/or its affiliates. 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. Oracle designates this |
|
8 * particular file as subject to the "Classpath" exception as provided |
|
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
22 * or visit www.oracle.com if you need additional information or have any |
|
23 * questions. |
|
24 */ |
|
25 |
|
26 /* |
|
27 * This file is available under and governed by the GNU General Public |
|
28 * License version 2 only, as published by the Free Software Foundation. |
|
29 * However, the following notice accompanied the original version of this |
|
30 * file, and Oracle licenses the original version of this file under the BSD |
|
31 * license: |
|
32 */ |
|
33 /* |
|
34 Copyright 2016 Attila Szegedi |
|
35 |
|
36 Licensed under both the Apache License, Version 2.0 (the "Apache License") |
|
37 and the BSD License (the "BSD License"), with licensee being free to |
|
38 choose either of the two at their discretion. |
|
39 |
|
40 You may not use this file except in compliance with either the Apache |
|
41 License or the BSD License. |
|
42 |
|
43 If you choose to use this file in compliance with the Apache License, the |
|
44 following notice applies to you: |
|
45 |
|
46 You may obtain a copy of the Apache License at |
|
47 |
|
48 http://www.apache.org/licenses/LICENSE-2.0 |
|
49 |
|
50 Unless required by applicable law or agreed to in writing, software |
|
51 distributed under the License is distributed on an "AS IS" BASIS, |
|
52 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
|
53 implied. See the License for the specific language governing |
|
54 permissions and limitations under the License. |
|
55 |
|
56 If you choose to use this file in compliance with the BSD License, the |
|
57 following notice applies to you: |
|
58 |
|
59 Redistribution and use in source and binary forms, with or without |
|
60 modification, are permitted provided that the following conditions are |
|
61 met: |
|
62 * Redistributions of source code must retain the above copyright |
|
63 notice, this list of conditions and the following disclaimer. |
|
64 * Redistributions in binary form must reproduce the above copyright |
|
65 notice, this list of conditions and the following disclaimer in the |
|
66 documentation and/or other materials provided with the distribution. |
|
67 * Neither the name of the copyright holder nor the names of |
|
68 contributors may be used to endorse or promote products derived from |
|
69 this software without specific prior written permission. |
|
70 |
|
71 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
|
72 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
|
73 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
|
74 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
|
75 BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
|
76 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
|
77 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
|
78 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
|
79 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
|
80 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
|
81 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
82 */ |
|
83 |
|
84 package jdk.dynalink; |
|
85 |
|
86 /** |
|
87 * An enumeration of standard namespaces defined by Dynalink. |
|
88 */ |
|
89 public enum StandardNamespace implements Namespace { |
|
90 /** |
|
91 * Standard namespace for properties of an object. |
|
92 */ |
|
93 PROPERTY, |
|
94 /** |
|
95 * Standard namespace for elements of a collection object. |
|
96 */ |
|
97 ELEMENT, |
|
98 /** |
|
99 * Standard namespace for methods of an object. The method objects retrieved |
|
100 * through a {@link StandardOperation#GET} on this namespace can be (and where |
|
101 * object semantics allows they should be) unbound, that is: not bound to the |
|
102 * object they were retrieved through. When they are used with |
|
103 * {@link StandardOperation#CALL} an explicit "this" receiver argument is always |
|
104 * passed to them. Of course bound methods can be returned if the object semantics |
|
105 * requires them and such methods are free to ignore the receiver passed in the |
|
106 * {@code CALL} operation or even raise an error when it is different from the one |
|
107 * the method is bound to, or exhibit any other behavior their semantics requires |
|
108 * in such case. |
|
109 */ |
|
110 METHOD; |
|
111 |
|
112 /** |
|
113 * If the passed in operation is a {@link NamespaceOperation}, or a |
|
114 * {@link NamedOperation} wrapping a {@link NamespaceOperation}, then it |
|
115 * returns the first (if any) {@link StandardNamespace} in its namespace |
|
116 * list. If the passed operation is not a namespace operation (optionally |
|
117 * wrapped in a named operation), or if it doesn't have any standard |
|
118 * namespaces in it, returns {@code null}. |
|
119 * @param op the operation |
|
120 * @return the first standard namespace in the operation's namespace list |
|
121 */ |
|
122 public static StandardNamespace findFirst(final Operation op) { |
|
123 for(final Namespace ns: NamespaceOperation.getNamespaces(NamedOperation.getBaseOperation(op))) { |
|
124 if (ns instanceof StandardNamespace) { |
|
125 return (StandardNamespace)ns; |
|
126 } |
|
127 } |
|
128 return null; |
|
129 } |
|
130 } |