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 }