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
26package sun.net.www.protocol.http;
27
28import java.net.Authenticator;
29import java.util.concurrent.atomic.AtomicLong;
30
31/**
32 *  A class used to tie a key to an authenticator instance.
33 */
34public final class AuthenticatorKeys {
35    private AuthenticatorKeys() {
36        throw new InternalError("Trying to instantiate static class");
37    }
38
39    public static final String DEFAULT = "default";
40    private static final AtomicLong IDS = new AtomicLong();
41
42    public static String computeKey(Authenticator a) {
43        return System.identityHashCode(a) + "-" + IDS.incrementAndGet()
44               + "@" + a.getClass().getName();
45    }
46
47    /**
48     * Returns a key for the given authenticator.
49     *
50     * @param authenticator The authenticator; {@code null} should be
51     *        passed when the {@linkplain
52     *        Authenticator#setDefault(java.net.Authenticator) default}
53     *        authenticator is meant.
54     * @return A key for the given authenticator, {@link #DEFAULT} for
55     *         {@code null}.
56     */
57    public static String getKey(Authenticator authenticator) {
58        if (authenticator == null) {
59            return DEFAULT;
60        }
61        return authenticatorKeyAccess.getKey(authenticator);
62    }
63
64    @FunctionalInterface
65    public interface AuthenticatorKeyAccess {
66        public String getKey(Authenticator a);
67    }
68
69    private static AuthenticatorKeyAccess authenticatorKeyAccess;
70    public static void setAuthenticatorKeyAccess(AuthenticatorKeyAccess access) {
71        if (authenticatorKeyAccess == null && access != null) {
72            authenticatorKeyAccess = access;
73        }
74    }
75
76}
77