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/*
 *  Copyright 2001-2009 Stephen Colebourne
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.joda.time.tz;

import java.util.Collections;
import java.util.Set;

import org.joda.time.DateTimeZone;

/**
 * Simple time zone provider that supports only UTC.
 * 

* UTCProvider is thread-safe and immutable. * * @author Brian S O'Neill * @since 1.0 */ public final class UTCProvider implements Provider { /** * The available IDs. */ private static final Set AVAILABLE_IDS = Collections.singleton("UTC"); /** * Constructor. */ public UTCProvider() { super(); } /** * Returns {@link DateTimeZone#UTC UTC} for "UTC", null * otherwise. */ public DateTimeZone getZone(String id) { if ("UTC".equalsIgnoreCase(id)) { return DateTimeZone.UTC; } return null; } /** * Returns a singleton collection containing only "UTC". */ public Set getAvailableIDs() { return AVAILABLE_IDS; } }





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