| /* |
| * Copyright (c) 2007, 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. |
| * |
| * 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 com.foo; |
| |
| import java.text.*; |
| import java.text.spi.*; |
| import java.util.*; |
| |
| import com.foobar.Utils; |
| |
| public class NumberFormatProviderImpl extends NumberFormatProvider { |
| |
| static Locale[] avail = { |
| Locale.JAPAN, |
| new Locale("ja", "JP", "osaka"), |
| new Locale("ja", "JP", "kyoto"), |
| new Locale("zz")}; |
| |
| static String[] dialect = { |
| "\u3067\u3059\u3002", |
| "\u3084\u3002", |
| "\u3069\u3059\u3002", |
| "-zz" |
| }; |
| |
| static String[] patterns = { |
| "#,##0.###{0};-#,##0.###{1}", // decimal pattern |
| "\u00A4#,##0{0};-\u00A4#,##0{1}", // currency pattern |
| "#,##0%{0}" // percent pattern |
| }; |
| // Constants used by factory methods to specify a style of format. |
| static final int NUMBERSTYLE = 0; |
| static final int CURRENCYSTYLE = 1; |
| static final int PERCENTSTYLE = 2; |
| |
| public Locale[] getAvailableLocales() { |
| return avail; |
| } |
| |
| public NumberFormat getCurrencyInstance(Locale locale) { |
| for (int i = 0; i < avail.length; i ++) { |
| if (Utils.supportsLocale(avail[i], locale)) { |
| String pattern = |
| MessageFormat.format(patterns[CURRENCYSTYLE], |
| dialect[i], |
| dialect[i]); |
| DecimalFormat df = new DecimalFormat(pattern, |
| DecimalFormatSymbols.getInstance(locale)); |
| adjustForCurrencyDefaultFractionDigits(df); |
| return df; |
| } |
| } |
| throw new IllegalArgumentException("locale is not supported: "+locale); |
| } |
| |
| public NumberFormat getIntegerInstance(Locale locale) { |
| for (int i = 0; i < avail.length; i ++) { |
| if (Utils.supportsLocale(avail[i], locale)) { |
| String pattern = |
| MessageFormat.format(patterns[NUMBERSTYLE], |
| dialect[i], |
| dialect[i]); |
| DecimalFormat df = new DecimalFormat(pattern, |
| DecimalFormatSymbols.getInstance(locale)); |
| df.setMaximumFractionDigits(0); |
| df.setDecimalSeparatorAlwaysShown(false); |
| df.setParseIntegerOnly(true); |
| return df; |
| } |
| } |
| throw new IllegalArgumentException("locale is not supported: "+locale); |
| } |
| |
| public NumberFormat getNumberInstance(Locale locale) { |
| for (int i = 0; i < avail.length; i ++) { |
| if (Utils.supportsLocale(avail[i], locale)) { |
| String pattern = |
| MessageFormat.format(patterns[NUMBERSTYLE], |
| dialect[i], |
| dialect[i]); |
| return new DecimalFormat(pattern, |
| DecimalFormatSymbols.getInstance(locale)); |
| } |
| } |
| throw new IllegalArgumentException("locale is not supported: "+locale); |
| } |
| |
| public NumberFormat getPercentInstance(Locale locale) { |
| for (int i = 0; i < avail.length; i ++) { |
| if (Utils.supportsLocale(avail[i], locale)) { |
| String pattern = |
| MessageFormat.format(patterns[PERCENTSTYLE], |
| dialect[i]); |
| return new DecimalFormat(pattern, |
| DecimalFormatSymbols.getInstance(locale)); |
| } |
| } |
| throw new IllegalArgumentException("locale is not supported: "+locale); |
| } |
| |
| /** |
| * Adjusts the minimum and maximum fraction digits to values that |
| * are reasonable for the currency's default fraction digits. |
| */ |
| void adjustForCurrencyDefaultFractionDigits(DecimalFormat df) { |
| DecimalFormatSymbols dfs = df.getDecimalFormatSymbols(); |
| Currency currency = dfs.getCurrency(); |
| if (currency == null) { |
| try { |
| currency = Currency.getInstance(dfs.getInternationalCurrencySymbol()); |
| } catch (IllegalArgumentException e) { |
| } |
| } |
| if (currency != null) { |
| int digits = currency.getDefaultFractionDigits(); |
| if (digits != -1) { |
| int oldMinDigits = df.getMinimumFractionDigits(); |
| // Common patterns are "#.##", "#.00", "#". |
| // Try to adjust all of them in a reasonable way. |
| if (oldMinDigits == df.getMaximumFractionDigits()) { |
| df.setMinimumFractionDigits(digits); |
| df.setMaximumFractionDigits(digits); |
| } else { |
| df.setMinimumFractionDigits(Math.min(digits, oldMinDigits)); |
| df.setMaximumFractionDigits(digits); |
| } |
| } |
| } |
| } |
| } |