J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | /* |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | package com.foo; |
| 28 | |
| 29 | import java.text.*; |
| 30 | import java.text.spi.*; |
| 31 | import java.util.*; |
| 32 | |
| 33 | import com.foobar.Utils; |
| 34 | |
| 35 | public class NumberFormatProviderImpl extends NumberFormatProvider { |
| 36 | |
| 37 | static Locale[] avail = { |
| 38 | Locale.JAPAN, |
| 39 | new Locale("ja", "JP", "osaka"), |
| 40 | new Locale("ja", "JP", "kyoto"), |
| 41 | new Locale("zz")}; |
| 42 | |
| 43 | static String[] dialect = { |
| 44 | "\u3067\u3059\u3002", |
| 45 | "\u3084\u3002", |
| 46 | "\u3069\u3059\u3002", |
| 47 | "-zz" |
| 48 | }; |
| 49 | |
| 50 | static String[] patterns = { |
| 51 | "#,##0.###{0};-#,##0.###{1}", // decimal pattern |
| 52 | "\u00A4#,##0{0};-\u00A4#,##0{1}", // currency pattern |
| 53 | "#,##0%{0}" // percent pattern |
| 54 | }; |
| 55 | // Constants used by factory methods to specify a style of format. |
| 56 | static final int NUMBERSTYLE = 0; |
| 57 | static final int CURRENCYSTYLE = 1; |
| 58 | static final int PERCENTSTYLE = 2; |
| 59 | |
| 60 | public Locale[] getAvailableLocales() { |
| 61 | return avail; |
| 62 | } |
| 63 | |
| 64 | public NumberFormat getCurrencyInstance(Locale locale) { |
| 65 | for (int i = 0; i < avail.length; i ++) { |
| 66 | if (Utils.supportsLocale(avail[i], locale)) { |
| 67 | String pattern = |
| 68 | MessageFormat.format(patterns[CURRENCYSTYLE], |
| 69 | dialect[i], |
| 70 | dialect[i]); |
| 71 | DecimalFormat df = new DecimalFormat(pattern, |
| 72 | DecimalFormatSymbols.getInstance(locale)); |
| 73 | adjustForCurrencyDefaultFractionDigits(df); |
| 74 | return df; |
| 75 | } |
| 76 | } |
| 77 | throw new IllegalArgumentException("locale is not supported: "+locale); |
| 78 | } |
| 79 | |
| 80 | public NumberFormat getIntegerInstance(Locale locale) { |
| 81 | for (int i = 0; i < avail.length; i ++) { |
| 82 | if (Utils.supportsLocale(avail[i], locale)) { |
| 83 | String pattern = |
| 84 | MessageFormat.format(patterns[NUMBERSTYLE], |
| 85 | dialect[i], |
| 86 | dialect[i]); |
| 87 | DecimalFormat df = new DecimalFormat(pattern, |
| 88 | DecimalFormatSymbols.getInstance(locale)); |
| 89 | df.setMaximumFractionDigits(0); |
| 90 | df.setDecimalSeparatorAlwaysShown(false); |
| 91 | df.setParseIntegerOnly(true); |
| 92 | return df; |
| 93 | } |
| 94 | } |
| 95 | throw new IllegalArgumentException("locale is not supported: "+locale); |
| 96 | } |
| 97 | |
| 98 | public NumberFormat getNumberInstance(Locale locale) { |
| 99 | for (int i = 0; i < avail.length; i ++) { |
| 100 | if (Utils.supportsLocale(avail[i], locale)) { |
| 101 | String pattern = |
| 102 | MessageFormat.format(patterns[NUMBERSTYLE], |
| 103 | dialect[i], |
| 104 | dialect[i]); |
| 105 | return new DecimalFormat(pattern, |
| 106 | DecimalFormatSymbols.getInstance(locale)); |
| 107 | } |
| 108 | } |
| 109 | throw new IllegalArgumentException("locale is not supported: "+locale); |
| 110 | } |
| 111 | |
| 112 | public NumberFormat getPercentInstance(Locale locale) { |
| 113 | for (int i = 0; i < avail.length; i ++) { |
| 114 | if (Utils.supportsLocale(avail[i], locale)) { |
| 115 | String pattern = |
| 116 | MessageFormat.format(patterns[PERCENTSTYLE], |
| 117 | dialect[i]); |
| 118 | return new DecimalFormat(pattern, |
| 119 | DecimalFormatSymbols.getInstance(locale)); |
| 120 | } |
| 121 | } |
| 122 | throw new IllegalArgumentException("locale is not supported: "+locale); |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Adjusts the minimum and maximum fraction digits to values that |
| 127 | * are reasonable for the currency's default fraction digits. |
| 128 | */ |
| 129 | void adjustForCurrencyDefaultFractionDigits(DecimalFormat df) { |
| 130 | DecimalFormatSymbols dfs = df.getDecimalFormatSymbols(); |
| 131 | Currency currency = dfs.getCurrency(); |
| 132 | if (currency == null) { |
| 133 | try { |
| 134 | currency = Currency.getInstance(dfs.getInternationalCurrencySymbol()); |
| 135 | } catch (IllegalArgumentException e) { |
| 136 | } |
| 137 | } |
| 138 | if (currency != null) { |
| 139 | int digits = currency.getDefaultFractionDigits(); |
| 140 | if (digits != -1) { |
| 141 | int oldMinDigits = df.getMinimumFractionDigits(); |
| 142 | // Common patterns are "#.##", "#.00", "#". |
| 143 | // Try to adjust all of them in a reasonable way. |
| 144 | if (oldMinDigits == df.getMaximumFractionDigits()) { |
| 145 | df.setMinimumFractionDigits(digits); |
| 146 | df.setMaximumFractionDigits(digits); |
| 147 | } else { |
| 148 | df.setMinimumFractionDigits(Math.min(digits, oldMinDigits)); |
| 149 | df.setMaximumFractionDigits(digits); |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | } |