/*

 * Copyright (c) 2012, 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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 * questions.

 */

package sun.util.locale.provider;

import java.util.Locale;

import java.util.Set;

import java.util.spi.CurrencyNameProvider;

/**

 * Concrete implementation of the

 * {@link java.util.spi.CurrencyNameProvider CurrencyNameProvider} class

 * for the JRE LocaleProviderAdapter.

 *

 * @author Naoto Sato

 * @author Masayoshi Okutsu

 */

public class CurrencyNameProviderImpl extends CurrencyNameProvider

                                      implements AvailableLanguageTags {

    private final LocaleProviderAdapter.Type type;

    private final Set<String> langtags;

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

        this.type = type;

        this.langtags = langtags;

    }

    @Override

    public Set<String> getAvailableLanguageTags() {

        return 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);

    }

    /**

     * Gets the symbol of the given currency code for the specified locale.

     * For example, for "USD" (US Dollar), the symbol is "$" if the specified

     * locale is the US, while for other locales it may be "US$". If no

     * symbol can be determined, null should be returned.

     *

     * @param currencyCode the ISO 4217 currency code, which

     *     consists of three upper-case letters between 'A' (U+0041) and

     *     'Z' (U+005A)

     * @param locale the desired locale

     * @return the symbol of the given currency code for the specified locale, or null if

     *     the symbol is not available for the locale

     * @exception NullPointerException if <code>currencyCode</code> or

     *     <code>locale</code> is null

     * @exception IllegalArgumentException if <code>currencyCode</code> is not in

     *     the form of three 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.Currency#getSymbol(java.util.Locale)

     */

    @Override

    public String getSymbol(String currencyCode, Locale locale) {

        return getString(currencyCode.toUpperCase(Locale.ROOT), locale);

    }

    /**

     * Returns a name for the currency that is appropriate for display to the

     * user.  The default implementation returns null.

     *

     * @param currencyCode the ISO 4217 currency code, which

     *     consists of three upper-case letters between 'A' (U+0041) and

     *     'Z' (U+005A)

     * @param locale the desired locale

     * @return the name for the currency that is appropriate for display to the

     *     user, or null if the name is not available for the locale

     * @exception IllegalArgumentException if <code>currencyCode</code> is not in

     *     the form of three upper-case letters, or <code>locale</code> isn't

     *     one of the locales returned from

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

     *     getAvailableLocales()}.

     * @exception NullPointerException if <code>currencyCode</code> or

     *     <code>locale</code> is <code>null</code>

     * @since 1.7

     */

    @Override

    public String getDisplayName(String currencyCode, Locale locale) {

        return getString(currencyCode.toLowerCase(Locale.ROOT), locale);

    }

    private String getString(String key, Locale locale) {

        if (locale == null) {

            throw new NullPointerException();

        }

        return LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCurrencyName(key);

    }

}