1 /*
2 * Copyright 2001-2009 Stephen Colebourne
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.joda.time.tz;
17
18 import java.util.Set;
19
20 import org.joda.time.DateTimeZone;
21
22 /**
23 * Service provider factory for time zones.
24 *
25 * @author Brian S O'Neill
26 * @since 1.0
27 */
28 public interface Provider {
29
30 /**
31 * Retrieves a DateTimeZone for the given id. All providers must at
32 * least support id "UTC".
33 *
34 * @return null if not found
35 */
36 DateTimeZone getZone(String id);
37
38 /**
39 * Returns an unmodifiable set of ids. All providers must at least
40 * support id "UTC".
41 */
42 Set<String> getAvailableIDs();
43
44 }