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123 lines
4.1 KiB
123 lines
4.1 KiB
/*
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* Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.util.spi;
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import java.util.Arrays;
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import java.util.Currency;
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import java.util.List;
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import java.util.Locale;
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import java.util.ResourceBundle.Control;
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/**
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* An abstract class for service providers that
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* provide localized currency symbols and display names for the
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* {@link java.util.Currency Currency} class.
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* Note that currency symbols are considered names when determining
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* behaviors described in the
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* {@link java.util.spi.LocaleServiceProvider LocaleServiceProvider}
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* specification.
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*
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* @since 1.6
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*/
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public abstract class CurrencyNameProvider extends LocaleServiceProvider {
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/**
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* Sole constructor. (For invocation by subclass constructors, typically
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* implicit.)
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*/
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protected CurrencyNameProvider() {
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}
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/**
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* Gets the symbol of the given currency code for the specified locale.
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* For example, for "USD" (US Dollar), the symbol is "$" if the specified
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* locale is the US, while for other locales it may be "US$". If no
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* symbol can be determined, null should be returned.
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*
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* @param currencyCode the ISO 4217 currency code, which
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* consists of three upper-case letters between 'A' (U+0041) and
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* 'Z' (U+005A)
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* @param locale the desired locale
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* @return the symbol of the given currency code for the specified locale, or null if
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* the symbol is not available for the locale
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* @exception NullPointerException if <code>currencyCode</code> or
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* <code>locale</code> is null
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* @exception IllegalArgumentException if <code>currencyCode</code> is not in
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* the form of three upper-case letters, or <code>locale</code> isn't
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* one of the locales returned from
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* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
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* getAvailableLocales()}.
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* @see java.util.Currency#getSymbol(java.util.Locale)
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*/
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public abstract String getSymbol(String currencyCode, Locale locale);
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/**
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* Returns a name for the currency that is appropriate for display to the
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* user. The default implementation returns null.
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*
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* @param currencyCode the ISO 4217 currency code, which
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* consists of three upper-case letters between 'A' (U+0041) and
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* 'Z' (U+005A)
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* @param locale the desired locale
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* @return the name for the currency that is appropriate for display to the
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* user, or null if the name is not available for the locale
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* @exception IllegalArgumentException if <code>currencyCode</code> is not in
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* the form of three upper-case letters, or <code>locale</code> isn't
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* one of the locales returned from
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* {@link java.util.spi.LocaleServiceProvider#getAvailableLocales()
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* getAvailableLocales()}.
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* @exception NullPointerException if <code>currencyCode</code> or
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* <code>locale</code> is <code>null</code>
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* @since 1.7
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*/
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public String getDisplayName(String currencyCode, Locale locale) {
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if (currencyCode == null || locale == null) {
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throw new NullPointerException();
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}
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// Check whether the currencyCode is valid
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char[] charray = currencyCode.toCharArray();
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if (charray.length != 3) {
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throw new IllegalArgumentException("The currencyCode is not in the form of three upper-case letters.");
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}
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for (char c : charray) {
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if (c < 'A' || c > 'Z') {
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throw new IllegalArgumentException("The currencyCode is not in the form of three upper-case letters.");
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}
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}
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// Check whether the locale is valid
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Control c = Control.getNoFallbackControl(Control.FORMAT_DEFAULT);
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for (Locale l : getAvailableLocales()) {
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if (c.getCandidateLocales("", l).contains(locale)) {
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return null;
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}
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}
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throw new IllegalArgumentException("The locale is not available");
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}
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}
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