1 /*
2  * Copyright (c) 2020, 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
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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.
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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.
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24  */
25 
26 package sun.security.util;
27 
28 /**
29  * This class implements an event model with services for reporter and listener.
30  * Reporter uses report() method to generate an event.
31  * Listener uses setReportListener() to register for listening to an event,
32  * and uses clearReportListener() to unregister a listening session.
33  * Listener should implement the event handling of the Reporter interface.
34  */
35 public final class Event {
Event()36     private Event() {}
37 
38     public enum ReporterCategory {
39         ZIPFILEATTRS();
40 
41         private Reporter reporter;
42     }
43 
44     public interface Reporter {
handle(String type, Object... args)45         public void handle(String type, Object... args);
46     }
47 
setReportListener(ReporterCategory cat, Reporter re)48     public static void setReportListener(ReporterCategory cat, Reporter re) {
49         cat.reporter = re;
50     }
51 
clearReportListener(ReporterCategory cat)52     public static void clearReportListener(ReporterCategory cat) {
53         cat.reporter = null;
54     }
55 
report(ReporterCategory cat, String type, Object... args)56     public static void report(ReporterCategory cat, String type, Object... args) {
57         Reporter currentReporter = cat.reporter;
58 
59         if (currentReporter != null) {
60             currentReporter.handle(type, args);
61         }
62     }
63 }
64