1 /* 2 * Copyright 2001-2005 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 import org.joda.time.DateTimeZone; 20 21 /** 22 * Service provider factory for time zones. 23 * 24 * @author Brian S O'Neill 25 * @since 1.0 26 */ 27 public interface Provider { 28 /** 29 * Retrieves a DateTimeZone for the given id. All providers must at 30 * least support id "UTC". 31 * 32 * @return null if not found 33 */ 34 DateTimeZone getZone(String id); 35 36 /** 37 * Returns an unmodifiable set of ids. All providers must at least 38 * support id "UTC". 39 */ 40 Set getAvailableIDs(); 41 } 42