| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * This file is available under and governed by the GNU General Public |
| * License version 2 only, as published by the Free Software Foundation. |
| * However, the following notice accompanied the original version of this |
| * file, and Oracle licenses the original version of this file under the BSD |
| * license: |
| */ |
| /* |
| Copyright 2016 Attila Szegedi |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are |
| met: |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| * Neither the name of the copyright holder nor the names of |
| contributors may be used to endorse or promote products derived from |
| this software without specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER |
| BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package jdk.dynalink; |
| |
| /** |
| * An enumeration of standard namespaces defined by Dynalink. |
| */ |
| public enum StandardNamespace implements Namespace { |
| /** |
| * Standard namespace for properties of an object. |
| */ |
| PROPERTY, |
| /** |
| * Standard namespace for elements of a collection object. |
| */ |
| ELEMENT, |
| /** |
| * Standard namespace for methods of an object. The method objects retrieved |
| * through a {@link StandardOperation#GET} on this namespace can be (and where |
| * object semantics allows they should be) unbound, that is: not bound to the |
| * object they were retrieved through. When they are used with |
| * {@link StandardOperation#CALL} an explicit "this" receiver argument is always |
| * passed to them. Of course bound methods can be returned if the object semantics |
| * requires them and such methods are free to ignore the receiver passed in the |
| * {@code CALL} operation or even raise an error when it is different from the one |
| * the method is bound to, or exhibit any other behavior their semantics requires |
| * in such case. |
| */ |
| METHOD; |
| |
| /** |
| * If the passed in operation is a {@link NamespaceOperation}, or a |
| * {@link NamedOperation} wrapping a {@link NamespaceOperation}, then it |
| * returns the first (if any) {@link StandardNamespace} in its namespace |
| * list. If the passed operation is not a namespace operation (optionally |
| * wrapped in a named operation), or if it doesn't have any standard |
| * namespaces in it, returns {@code null}. |
| * @param op the operation |
| * @return the first standard namespace in the operation's namespace list |
| */ |
| public static StandardNamespace findFirst(final Operation op) { |
| for(final Namespace ns: NamespaceOperation.getNamespaces(NamedOperation.getBaseOperation(op))) { |
| if (ns instanceof StandardNamespace) { |
| return (StandardNamespace)ns; |
| } |
| } |
| return null; |
| } |
| } |