001 /* 002 * Copyright 2001-2005 Stephen Colebourne 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 package org.joda.time.tz; 017 018 import java.util.Set; 019 import org.joda.time.DateTimeZone; 020 021 /** 022 * Service provider factory for time zones. 023 * 024 * @author Brian S O'Neill 025 * @since 1.0 026 */ 027 public interface Provider { 028 /** 029 * Retrieves a DateTimeZone for the given id. All providers must at 030 * least support id "UTC". 031 * 032 * @return null if not found 033 */ 034 DateTimeZone getZone(String id); 035 036 /** 037 * Returns an unmodifiable set of ids. All providers must at least 038 * support id "UTC". 039 */ 040 Set getAvailableIDs(); 041 }