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	/*
	* 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.Locale;
	import java.util.Set;
	import java.util.spi.LocaleNameProvider;

	/**
	* Concrete implementation of the
	* {@link java.util.spi.LocaleNameProvider LocaleNameProvider} class
	* for the JRE LocaleProviderAdapter.
	*
	* @author Naoto Sato
	* @author Masayoshi Okutsu
	*/
	public class LocaleNameProviderImpl extends LocaleNameProvider implements AvailableLanguageTags {
	private final LocaleProviderAdapter.Type type;
	private final Set<String> langtags;

	public LocaleNameProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
	this.type = type;
	this.langtags = langtags;
	}

	/**
	* Returns an array of all locales for which this locale service provider
	* can provide localized objects or names.
	*
	* @return An array of all locales for which this locale service provider
	* can provide localized objects or names.
	*/
	@Override
	public Locale[] getAvailableLocales() {
	return LocaleProviderAdapter.toLocaleArray(langtags);
	}

	@Override
	public boolean isSupportedLocale(Locale locale) {
	return LocaleProviderAdapter.isSupportedLocale(locale, type, langtags);
	}

	/**
	* Returns a localized name for the given ISO 639 language code and the
	* given locale that is appropriate for display to the user.
	* For example, if <code>languageCode</code> is "fr" and <code>locale</code>
	* is en_US, getDisplayLanguage() will return "French"; if <code>languageCode</code>
	* is "en" and <code>locale</code> is fr_FR, getDisplayLanguage() will return "anglais".
	* If the name returned cannot be localized according to <code>locale</code>,
	* (say, the provider does not have a Japanese name for Croatian),
	* this method returns null.
	* @param languageCode the ISO 639 language code string in the form of two
	* lower-case letters between 'a' (U+0061) and 'z' (U+007A)
	* @param locale the desired locale
	* @return the name of the given language code for the specified locale, or null if it's not
	* available.
	* @exception NullPointerException if <code>languageCode</code> or <code>locale</code> is null
	* @exception IllegalArgumentException if <code>languageCode</code> is not in the form of
	* two lower-case letters, or <code>locale</code> isn't
	* one of the locales returned from
	* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
	* getAvailableLocales()}.
	* @see java.util.Locale#getDisplayLanguage(java.util.Locale)
	*/
	@Override
	public String getDisplayLanguage(String lang, Locale locale) {
	return getDisplayString(lang, locale);
	}

	/**
	* Returns a localized name for the given <a href="http://www.rfc-editor.org/rfc/bcp/bcp47.txt">
	* IETF BCP47</a> script code and the given locale that is appropriate for
	* display to the user.
	* For example, if <code>scriptCode</code> is "Latn" and <code>locale</code>
	* is en_US, getDisplayScript() will return "Latin"; if <code>scriptCode</code>
	* is "Cyrl" and <code>locale</code> is fr_FR, getDisplayScript() will return "cyrillique".
	* If the name returned cannot be localized according to <code>locale</code>,
	* (say, the provider does not have a Japanese name for Cyrillic),
	* this method returns null. The default implementation returns null.
	* @param scriptCode the four letter script code string in the form of title-case
	* letters (the first letter is upper-case character between 'A' (U+0041) and
	* 'Z' (U+005A) followed by three lower-case character between 'a' (U+0061)
	* and 'z' (U+007A)).
	* @param locale the desired locale
	* @return the name of the given script code for the specified locale, or null if it's not
	* available.
	* @exception NullPointerException if <code>scriptCode</code> or <code>locale</code> is null
	* @exception IllegalArgumentException if <code>scriptCode</code> is not in the form of
	* four title case letters, or <code>locale</code> isn't
	* one of the locales returned from
	* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
	* getAvailableLocales()}.
	* @see java.util.Locale#getDisplayScript(java.util.Locale)
	*/
	@Override
	public String getDisplayScript(String scriptCode, Locale locale) {
	return getDisplayString(scriptCode, locale);
	}

	/**
	* Returns a localized name for the given ISO 3166 country code and the
	* given locale that is appropriate for display to the user.
	* For example, if <code>countryCode</code> is "FR" and <code>locale</code>
	* is en_US, getDisplayCountry() will return "France"; if <code>countryCode</code>
	* is "US" and <code>locale</code> is fr_FR, getDisplayCountry() will return "Etats-Unis".
	* If the name returned cannot be localized according to <code>locale</code>,
	* (say, the provider does not have a Japanese name for Croatia),
	* this method returns null.
	* @param countryCode the ISO 3166 country code string in the form of two
	* upper-case letters between 'A' (U+0041) and 'Z' (U+005A)
	* @param locale the desired locale
	* @return the name of the given country code for the specified locale, or null if it's not
	* available.
	* @exception NullPointerException if <code>countryCode</code> or <code>locale</code> is null
	* @exception IllegalArgumentException if <code>countryCode</code> is not in the form of
	* two upper-case letters, or <code>locale</code> isn't
	* one of the locales returned from
	* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
	* getAvailableLocales()}.
	* @see java.util.Locale#getDisplayCountry(java.util.Locale)
	*/
	@Override
	public String getDisplayCountry(String ctry, Locale locale) {
	return getDisplayString(ctry, locale);
	}

	/**
	* Returns a localized name for the given variant code and the given locale that
	* is appropriate for display to the user.
	* If the name returned cannot be localized according to <code>locale</code>,
	* this method returns null.
	* @param variant the variant string
	* @param locale the desired locale
	* @return the name of the given variant string for the specified locale, or null if it's not
	* available.
	* @exception NullPointerException if <code>variant</code> or <code>locale</code> is null
	* @exception IllegalArgumentException if <code>locale</code> isn't
	* one of the locales returned from
	* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
	* getAvailableLocales()}.
	* @see java.util.Locale#getDisplayVariant(java.util.Locale)
	*/
	@Override
	public String getDisplayVariant(String vrnt, Locale locale) {
	return getDisplayString("%%"+vrnt, locale);
	}

	private String getDisplayString(String key, Locale locale) {
	if (key == null \|\| locale == null) {
	throw new NullPointerException();
	}

	return LocaleProviderAdapter.forType(type).getLocaleResources(locale).getLocaleName(key);
	}

	@Override
	public Set<String> getAvailableLanguageTags() {
	return langtags;
	}
	}

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