| /* |
| * Copyright (c) 1999, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * |
| * (C) Copyright Taligent, Inc. 1996, 1997 - All Rights Reserved |
| * (C) Copyright IBM Corp. 1996 - 2002 - All Rights Reserved |
| * |
| * The original version of this source code and documentation |
| * is copyrighted and owned by Taligent, Inc., a wholly-owned |
| * subsidiary of IBM. These materials are provided under terms |
| * of a License Agreement between Taligent and Sun. This technology |
| * is protected by multiple US and International patents. |
| * |
| * This notice and attribution to Taligent may not be removed. |
| * Taligent is a registered trademark of Taligent, Inc. |
| */ |
| |
| package sun.util.locale.provider; |
| |
| import java.text.DecimalFormat; |
| import java.text.DecimalFormatSymbols; |
| import java.text.NumberFormat; |
| import java.text.spi.NumberFormatProvider; |
| import java.util.Currency; |
| import java.util.Locale; |
| import java.util.Set; |
| |
| /** |
| * Concrete implementation of the {@link java.text.spi.NumberFormatProvider |
| * NumberFormatProvider} class for the JRE LocaleProviderAdapter. |
| * |
| * @author Naoto Sato |
| * @author Masayoshi Okutsu |
| */ |
| public class NumberFormatProviderImpl extends NumberFormatProvider implements AvailableLanguageTags { |
| |
| // Constants used by factory methods to specify a style of format. |
| private static final int NUMBERSTYLE = 0; |
| private static final int CURRENCYSTYLE = 1; |
| private static final int PERCENTSTYLE = 2; |
| private static final int SCIENTIFICSTYLE = 3; |
| private static final int INTEGERSTYLE = 4; |
| |
| private final LocaleProviderAdapter.Type type; |
| private final Set<String> langtags; |
| |
| public NumberFormatProviderImpl(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.forType(type).getAvailableLocales(); |
| } |
| |
| @Override |
| public boolean isSupportedLocale(Locale locale) { |
| return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags); |
| } |
| |
| /** |
| * Returns a new <code>NumberFormat</code> instance which formats |
| * monetary values for the specified locale. |
| * |
| * @param locale the desired locale. |
| * @exception NullPointerException if <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()}. |
| * @return a currency formatter |
| * @see java.text.NumberFormat#getCurrencyInstance(java.util.Locale) |
| */ |
| @Override |
| public NumberFormat getCurrencyInstance(Locale locale) { |
| return getInstance(locale, CURRENCYSTYLE); |
| } |
| |
| /** |
| * Returns a new <code>NumberFormat</code> instance which formats |
| * integer values for the specified locale. |
| * The returned number format is configured to |
| * round floating point numbers to the nearest integer using |
| * half-even rounding (see {@link java.math.RoundingMode#HALF_EVEN HALF_EVEN}) |
| * for formatting, and to parse only the integer part of |
| * an input string (see {@link |
| * java.text.NumberFormat#isParseIntegerOnly isParseIntegerOnly}). |
| * |
| * @param locale the desired locale |
| * @exception NullPointerException if <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()}. |
| * @return a number format for integer values |
| * @see java.text.NumberFormat#getIntegerInstance(java.util.Locale) |
| */ |
| @Override |
| public NumberFormat getIntegerInstance(Locale locale) { |
| return getInstance(locale, INTEGERSTYLE); |
| } |
| |
| /** |
| * Returns a new general-purpose <code>NumberFormat</code> instance for |
| * the specified locale. |
| * |
| * @param locale the desired locale |
| * @exception NullPointerException if <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()}. |
| * @return a general-purpose number formatter |
| * @see java.text.NumberFormat#getNumberInstance(java.util.Locale) |
| */ |
| @Override |
| public NumberFormat getNumberInstance(Locale locale) { |
| return getInstance(locale, NUMBERSTYLE); |
| } |
| |
| /** |
| * Returns a new <code>NumberFormat</code> instance which formats |
| * percentage values for the specified locale. |
| * |
| * @param locale the desired locale |
| * @exception NullPointerException if <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()}. |
| * @return a percent formatter |
| * @see java.text.NumberFormat#getPercentInstance(java.util.Locale) |
| */ |
| @Override |
| public NumberFormat getPercentInstance(Locale locale) { |
| return getInstance(locale, PERCENTSTYLE); |
| } |
| |
| private NumberFormat getInstance(Locale locale, |
| int choice) { |
| if (locale == null) { |
| throw new NullPointerException(); |
| } |
| |
| // Check for region override |
| Locale override = locale.getUnicodeLocaleType("nu") == null ? |
| CalendarDataUtility.findRegionOverride(locale) : |
| locale; |
| |
| LocaleProviderAdapter adapter = LocaleProviderAdapter.forType(type); |
| String[] numberPatterns = adapter.getLocaleResources(override).getNumberPatterns(); |
| DecimalFormatSymbols symbols = DecimalFormatSymbols.getInstance(override); |
| int entry = (choice == INTEGERSTYLE) ? NUMBERSTYLE : choice; |
| DecimalFormat format = new DecimalFormat(numberPatterns[entry], symbols); |
| |
| if (choice == INTEGERSTYLE) { |
| format.setMaximumFractionDigits(0); |
| format.setDecimalSeparatorAlwaysShown(false); |
| format.setParseIntegerOnly(true); |
| } else if (choice == CURRENCYSTYLE) { |
| adjustForCurrencyDefaultFractionDigits(format, symbols); |
| } |
| |
| return format; |
| } |
| |
| /** |
| * Adjusts the minimum and maximum fraction digits to values that |
| * are reasonable for the currency's default fraction digits. |
| */ |
| private static void adjustForCurrencyDefaultFractionDigits( |
| DecimalFormat format, DecimalFormatSymbols symbols) { |
| Currency currency = symbols.getCurrency(); |
| if (currency == null) { |
| try { |
| currency = Currency.getInstance(symbols.getInternationalCurrencySymbol()); |
| } catch (IllegalArgumentException e) { |
| } |
| } |
| if (currency != null) { |
| int digits = currency.getDefaultFractionDigits(); |
| if (digits != -1) { |
| int oldMinDigits = format.getMinimumFractionDigits(); |
| // Common patterns are "#.##", "#.00", "#". |
| // Try to adjust all of them in a reasonable way. |
| if (oldMinDigits == format.getMaximumFractionDigits()) { |
| format.setMinimumFractionDigits(digits); |
| format.setMaximumFractionDigits(digits); |
| } else { |
| format.setMinimumFractionDigits(Math.min(digits, oldMinDigits)); |
| format.setMaximumFractionDigits(digits); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public Set<String> getAvailableLanguageTags() { |
| return langtags; |
| } |
| } |
