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/*
* Copyright (c) 2007, 2010, 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
"#{0};(#){1}", // integer 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 INTEGERSTYLE = 1;
static final int CURRENCYSTYLE = 2;
static final int PERCENTSTYLE = 3;
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]);
FooNumberFormat nf = new FooNumberFormat(pattern,
DecimalFormatSymbols.getInstance(locale));
adjustForCurrencyDefaultFractionDigits(nf);
return nf;
}
}
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[INTEGERSTYLE],
dialect[i],
dialect[i]);
FooNumberFormat nf = new FooNumberFormat(pattern,
DecimalFormatSymbols.getInstance(locale));
nf.setMaximumFractionDigits(0);
nf.setDecimalSeparatorAlwaysShown(false);
nf.setParseIntegerOnly(true);
return nf;
}
}
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 FooNumberFormat(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 FooNumberFormat(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(FooNumberFormat nf) {
DecimalFormatSymbols dfs = nf.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 = nf.getMinimumFractionDigits();
// Common patterns are "#.##", "#.00", "#".
// Try to adjust all of them in a reasonable way.
if (oldMinDigits == nf.getMaximumFractionDigits()) {
nf.setMinimumFractionDigits(digits);
nf.setMaximumFractionDigits(digits);
} else {
nf.setMinimumFractionDigits(Math.min(digits, oldMinDigits));
nf.setMaximumFractionDigits(digits);
}
}
}
}
}
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