Tue, 10 Feb 2015 18:12:00 +0100
Import initial revisions of existing project AndroidCaldavSyncAdapater,
forked from upstream repository at 27e8a0f8495c92e0780d450bdf0c7cec77a03a55.
1 /**
2 * Copyright (c) 2012, Ben Fortuna
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * o Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * o Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * o Neither the name of Ben Fortuna nor the names of any other contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package net.fortuna.ical4j.model;
34 import net.fortuna.ical4j.util.Configurator;
36 /**
37 * $Id$
38 *
39 * Created on 18/09/2005
40 *
41 * Provides access to the configured <code>TimeZoneRegistry</code> instance.
42 * Alternative factory implementations may be specified via the following
43 * system property:
44 * <pre>net.fortuna.ical4j.timezone.registry=<factory_class_name></pre>
45 * @author Ben Fortuna
46 */
47 public abstract class TimeZoneRegistryFactory {
49 /**
50 * The system property used to specify an alternate
51 * <code>TimeZoneRegistryFactory</code> implementation.
52 */
53 public static final String KEY_FACTORY_CLASS = "net.fortuna.ical4j.timezone.registry";
55 private static TimeZoneRegistryFactory instance;
56 static {
57 try {
58 final Class factoryClass = Class.forName(Configurator.getProperty(KEY_FACTORY_CLASS));
59 instance = (TimeZoneRegistryFactory) factoryClass.newInstance();
60 }
61 catch (Exception e) {
62 instance = new DefaultTimeZoneRegistryFactory();
63 }
64 }
66 /**
67 * @return a shared factory instance
68 */
69 public static TimeZoneRegistryFactory getInstance() {
70 return instance;
71 }
73 /**
74 * Returns a new instance of the configured <code>TimeZoneRegistry</code>.
75 * @return a timezone registry instance
76 */
77 public abstract TimeZoneRegistry createRegistry();
78 }