/*

 * Copyright (c) 2012, 2017, 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.

 *

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package sun.util.locale.provider;

import java.util.Locale;

import java.util.Set;

import java.util.spi.CalendarDataProvider;

/**

 * Concrete implementation of the  {@link java.util.spi.CalendarDataProvider

 * CalendarDataProvider} class for the JRE LocaleProviderAdapter.

 *

 * @author Masayoshi Okutsu

 * @author Naoto Sato

 */

public class CalendarDataProviderImpl extends CalendarDataProvider implements AvailableLanguageTags {

    private final LocaleProviderAdapter.Type type;

    private final Set<String> langtags;

    public CalendarDataProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {

        this.type = type;

        this.langtags = langtags;

    }

    @Override

    public int getFirstDayOfWeek(Locale locale) {

        String fw = LocaleProviderAdapter.forType(type).getLocaleResources(locale)

                   .getCalendarData(CalendarDataUtility.FIRST_DAY_OF_WEEK);

        return convertToCalendarData(fw);

    }

    @Override

    public int getMinimalDaysInFirstWeek(Locale locale) {

        String md = LocaleProviderAdapter.forType(type).getLocaleResources(locale)

                   .getCalendarData(CalendarDataUtility.MINIMAL_DAYS_IN_FIRST_WEEK);

        return convertToCalendarData(md);

    }

    @Override

    public Locale[] getAvailableLocales() {

        return LocaleProviderAdapter.toLocaleArray(langtags);

    }

    @Override

    public Set<String> getAvailableLanguageTags() {

        return langtags;

    }

    private int convertToCalendarData(String src) {

        int val = Integer.parseInt(src);

        return (src.isEmpty() || val <= 0 || val > 7) ? 0 : val;

    }

}