/*

 * Copyright (c) 2012, 2013, 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.util.locale.provider;

import java.util.Collections;

import java.util.HashSet;

import java.util.Locale;

import java.util.Set;

/**

 * FallbackProviderAdapter implementation.

 *

 * @author Naoto Sato

 */

public class FallbackLocaleProviderAdapter extends JRELocaleProviderAdapter {

    /**

     * Supported language tag set.

     */

    private static final Set<String> rootTagSet =

        Collections.singleton(Locale.ROOT.toLanguageTag());

    /**

     * Fallback provider only provides the ROOT locale data.

     */

    private final LocaleResources rootLocaleResources =

        new LocaleResources(this, Locale.ROOT);

    /**

     * Returns the type of this LocaleProviderAdapter

     */

    @Override

    public LocaleProviderAdapter.Type getAdapterType() {

        return Type.FALLBACK;

    }

    @Override

    public LocaleResources getLocaleResources(Locale locale) {

        return rootLocaleResources;

    }

    @Override

    protected Set<String> createLanguageTagSet(String category) {

        return rootTagSet;

    }

}