/* * Copyright (c) 1999, 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 * 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 langtags; public NumberFormatProviderImpl(LocaleProviderAdapter.Type type, Set 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 NumberFormat instance which formats * monetary values for the specified locale. * * @param locale the desired locale. * @exception NullPointerException if locale is null * @exception IllegalArgumentException if locale 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 NumberFormat 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 locale is null * @exception IllegalArgumentException if locale 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 NumberFormat instance for * the specified locale. * * @param locale the desired locale * @exception NullPointerException if locale is null * @exception IllegalArgumentException if locale 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 NumberFormat instance which formats * percentage values for the specified locale. * * @param locale the desired locale * @exception NullPointerException if locale is null * @exception IllegalArgumentException if locale 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(); } LocaleProviderAdapter adapter = LocaleProviderAdapter.forType(type); String[] numberPatterns = adapter.getLocaleResources(locale).getNumberPatterns(); DecimalFormatSymbols symbols = DecimalFormatSymbols.getInstance(locale); 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 getAvailableLanguageTags() { return langtags; } }