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 * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package java.util.spi;

import java.util.Locale;

/**

 * An abstract class for service providers that

 * provide localized time zone names for the

 * {@link java.util.TimeZone TimeZone} class.

 * The localized time zone names available from the implementations of

 * this class are also the source for the

 * {@link java.text.DateFormatSymbols#getZoneStrings()

 * DateFormatSymbols.getZoneStrings()} method.

 *

 * @since        1.6

 */

public abstract class TimeZoneNameProvider extends LocaleServiceProvider {

    /**

     * Sole constructor.  (For invocation by subclass constructors, typically

     * implicit.)

     */

    protected TimeZoneNameProvider() {

    }

    /**

     * Returns a name for the given time zone ID that's suitable for

     * presentation to the user in the specified locale. The given time

     * zone ID is "GMT" or one of the names defined using "Zone" entries

     * in the "tz database", a public domain time zone database at

     * <a href="https://www.iana.org/time-zones">https://www.iana.org/time-zones</a>.

     * The data of this database is contained in a file whose name starts with

     * "tzdata", and the specification of the data format is part of the zic.8

     * man page, which is contained in a file whose name starts with "tzcode".

     * <p>

     * If {@code daylight} is true, the method should return a name

     * appropriate for daylight saving time even if the specified time zone

     * has not observed daylight saving time in the past.

     *

     * @param ID a time zone ID string

     * @param daylight if true, return the daylight saving name.

     * @param style either {@link java.util.TimeZone#LONG TimeZone.LONG} or

     *    {@link java.util.TimeZone#SHORT TimeZone.SHORT}

     * @param locale the desired locale

     * @return the human-readable name of the given time zone in the

     *     given locale, or null if it's not available.

     * @throws    IllegalArgumentException if {@code style} is invalid,

     *     or {@code locale} isn't one of the locales returned from

     *     {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()

     *     getAvailableLocales()}.

     * @throws    NullPointerException if {@code ID} or {@code locale}

     *     is null

     * @see java.util.TimeZone#getDisplayName(boolean, int, java.util.Locale)

     */

    public abstract String getDisplayName(String ID, boolean daylight, int style, Locale locale);

    /**

     * Returns a generic name for the given time zone {@code ID} that's suitable

     * for presentation to the user in the specified {@code locale}. Generic

     * time zone names are neutral from standard time and daylight saving

     * time. For example, "PT" is the short generic name of time zone ID {@code

     * America/Los_Angeles}, while its short standard time and daylight saving

     * time names are "PST" and "PDT", respectively. Refer to

     * {@link #getDisplayName(String, boolean, int, Locale) getDisplayName}

     * for valid time zone IDs.

     *

     * <p>The default implementation of this method returns {@code null}.

     *

     * @param ID a time zone ID string

     * @param style either {@link java.util.TimeZone#LONG TimeZone.LONG} or

     *    {@link java.util.TimeZone#SHORT TimeZone.SHORT}

     * @param locale the desired locale

     * @return the human-readable generic name of the given time zone in the

     *     given locale, or {@code null} if it's not available.

     * @throws    IllegalArgumentException if {@code style} is invalid,

     *     or {@code locale} isn't one of the locales returned from

     *     {@link LocaleServiceProvider#getAvailableLocales()

     *     getAvailableLocales()}.

     * @throws    NullPointerException if {@code ID} or {@code locale}

     *     is {@code null}

     * @since 1.8

     */

    public String getGenericDisplayName(String ID, int style, Locale locale) {

        return null;

    }

}