Back to index...

	/*
	* Copyright (c) 2000, 2015, 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.
	*/

	package java.util;

	import java.io.BufferedInputStream;
	import java.io.DataInputStream;
	import java.io.File;
	import java.io.FileInputStream;
	import java.io.FileReader;
	import java.io.IOException;
	import java.io.Serializable;
	import java.security.AccessController;
	import java.security.PrivilegedAction;
	import java.text.ParseException;
	import java.text.SimpleDateFormat;
	import java.util.concurrent.ConcurrentHashMap;
	import java.util.concurrent.ConcurrentMap;
	import java.util.regex.Pattern;
	import java.util.regex.Matcher;
	import java.util.spi.CurrencyNameProvider;
	import sun.util.locale.provider.LocaleServiceProviderPool;
	import sun.util.logging.PlatformLogger;


	/**
	* Represents a currency. Currencies are identified by their ISO 4217 currency
	* codes. Visit the <a href="http://www.iso.org/iso/home/standards/currency_codes.htm">
	* ISO web site</a> for more information.
	* <p>
	* The class is designed so that there's never more than one
	* <code>Currency</code> instance for any given currency. Therefore, there's
	* no public constructor. You obtain a <code>Currency</code> instance using
	* the <code>getInstance</code> methods.
	* <p>
	* Users can supersede the Java runtime currency data by means of the system
	* property {@code java.util.currency.data}. If this system property is
	* defined then its value is the location of a properties file, the contents of
	* which are key/value pairs of the ISO 3166 country codes and the ISO 4217
	* currency data respectively. The value part consists of three ISO 4217 values
	* of a currency, i.e., an alphabetic code, a numeric code, and a minor unit.
	* Those three ISO 4217 values are separated by commas.
	* The lines which start with '#'s are considered comment lines. An optional UTC
	* timestamp may be specified per currency entry if users need to specify a
	* cutover date indicating when the new data comes into effect. The timestamp is
	* appended to the end of the currency properties and uses a comma as a separator.
	* If a UTC datestamp is present and valid, the JRE will only use the new currency
	* properties if the current UTC date is later than the date specified at class
	* loading time. The format of the timestamp must be of ISO 8601 format :
	* {@code 'yyyy-MM-dd'T'HH:mm:ss'}. For example,
	* <p>
	* <code>
	* #Sample currency properties<br>
	* JP=JPZ,999,0
	* </code>
	* <p>
	* will supersede the currency data for Japan.
	*
	* <p>
	* <code>
	* #Sample currency properties with cutover date<br>
	* JP=JPZ,999,0,2014-01-01T00:00:00
	* </code>
	* <p>
	* will supersede the currency data for Japan if {@code Currency} class is loaded after
	* 1st January 2014 00:00:00 GMT.
	* <p>
	* Where syntactically malformed entries are encountered, the entry is ignored
	* and the remainder of entries in file are processed. For instances where duplicate
	* country code entries exist, the behavior of the Currency information for that
	* {@code Currency} is undefined and the remainder of entries in file are processed.
	*
	* @since 1.4
	*/
	public final class Currency implements Serializable {

	private static final long serialVersionUID = -158308464356906721L;

	/**
	* ISO 4217 currency code for this currency.
	*
	* @serial
	*/
	private final String currencyCode;

	/**
	* Default fraction digits for this currency.
	* Set from currency data tables.
	*/
	transient private final int defaultFractionDigits;

	/**
	* ISO 4217 numeric code for this currency.
	* Set from currency data tables.
	*/
	transient private final int numericCode;


	// class data: instance map

	private static ConcurrentMap<String, Currency> instances = new ConcurrentHashMap<>(7);
	private static HashSet<Currency> available;

	// Class data: currency data obtained from currency.data file.
	// Purpose:
	// - determine valid country codes
	// - determine valid currency codes
	// - map country codes to currency codes
	// - obtain default fraction digits for currency codes
	//
	// sc = special case; dfd = default fraction digits
	// Simple countries are those where the country code is a prefix of the
	// currency code, and there are no known plans to change the currency.
	//
	// table formats:
	// - mainTable:
	// - maps country code to 32-bit int
	// - 2626 entries, corresponding to [A-Z][A-Z]
	// - \u007F -> not valid country
	// - bits 20-31: unused
	// - bits 10-19: numeric code (0 to 1023)
	// - bit 9: 1 - special case, bits 0-4 indicate which one
	// 0 - simple country, bits 0-4 indicate final char of currency code
	// - bits 5-8: fraction digits for simple countries, 0 for special cases
	// - bits 0-4: final char for currency code for simple country, or ID of special case
	// - special case IDs:
	// - 0: country has no currency
	// - other: index into sc* arrays + 1
	// - scCutOverTimes: cut-over time in millis as returned by
	// System.currentTimeMillis for special case countries that are changing
	// currencies; Long.MAX_VALUE for countries that are not changing currencies
	// - scOldCurrencies: old currencies for special case countries
	// - scNewCurrencies: new currencies for special case countries that are
	// changing currencies; null for others
	// - scOldCurrenciesDFD: default fraction digits for old currencies
	// - scNewCurrenciesDFD: default fraction digits for new currencies, 0 for
	// countries that are not changing currencies
	// - otherCurrencies: concatenation of all currency codes that are not the
	// main currency of a simple country, separated by "-"
	// - otherCurrenciesDFD: decimal format digits for currencies in otherCurrencies, same order

	static int formatVersion;
	static int dataVersion;
	static int[] mainTable;
	static long[] scCutOverTimes;
	static String[] scOldCurrencies;
	static String[] scNewCurrencies;
	static int[] scOldCurrenciesDFD;
	static int[] scNewCurrenciesDFD;
	static int[] scOldCurrenciesNumericCode;
	static int[] scNewCurrenciesNumericCode;
	static String otherCurrencies;
	static int[] otherCurrenciesDFD;
	static int[] otherCurrenciesNumericCode;

	// handy constants - must match definitions in GenerateCurrencyData
	// magic number
	private static final int MAGIC_NUMBER = 0x43757244;
	// number of characters from A to Z
	private static final int A_TO_Z = ('Z' - 'A') + 1;
	// entry for invalid country codes
	private static final int INVALID_COUNTRY_ENTRY = 0x0000007F;
	// entry for countries without currency
	private static final int COUNTRY_WITHOUT_CURRENCY_ENTRY = 0x00000200;
	// mask for simple case country entries
	private static final int SIMPLE_CASE_COUNTRY_MASK = 0x00000000;
	// mask for simple case country entry final character
	private static final int SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK = 0x0000001F;
	// mask for simple case country entry default currency digits
	private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK = 0x000001E0;
	// shift count for simple case country entry default currency digits
	private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT = 5;
	// maximum number for simple case country entry default currency digits
	private static final int SIMPLE_CASE_COUNTRY_MAX_DEFAULT_DIGITS = 9;
	// mask for special case country entries
	private static final int SPECIAL_CASE_COUNTRY_MASK = 0x00000200;
	// mask for special case country index
	private static final int SPECIAL_CASE_COUNTRY_INDEX_MASK = 0x0000001F;
	// delta from entry index component in main table to index into special case tables
	private static final int SPECIAL_CASE_COUNTRY_INDEX_DELTA = 1;
	// mask for distinguishing simple and special case countries
	private static final int COUNTRY_TYPE_MASK = SIMPLE_CASE_COUNTRY_MASK \| SPECIAL_CASE_COUNTRY_MASK;
	// mask for the numeric code of the currency
	private static final int NUMERIC_CODE_MASK = 0x000FFC00;
	// shift count for the numeric code of the currency
	private static final int NUMERIC_CODE_SHIFT = 10;

	// Currency data format version
	private static final int VALID_FORMAT_VERSION = 2;

	static {
	AccessController.doPrivileged(new PrivilegedAction<Void>() {
	@Override
	public Void run() {
	String homeDir = System.getProperty("java.home");
	try {
	String dataFile = homeDir + File.separator +
	"lib" + File.separator + "currency.data";
	try (DataInputStream dis = new DataInputStream(
	new BufferedInputStream(
	new FileInputStream(dataFile)))) {
	if (dis.readInt() != MAGIC_NUMBER) {
	throw new InternalError("Currency data is possibly corrupted");
	}
	formatVersion = dis.readInt();
	if (formatVersion != VALID_FORMAT_VERSION) {
	throw new InternalError("Currency data format is incorrect");
	}
	dataVersion = dis.readInt();
	mainTable = readIntArray(dis, A_TO_Z * A_TO_Z);
	int scCount = dis.readInt();
	scCutOverTimes = readLongArray(dis, scCount);
	scOldCurrencies = readStringArray(dis, scCount);
	scNewCurrencies = readStringArray(dis, scCount);
	scOldCurrenciesDFD = readIntArray(dis, scCount);
	scNewCurrenciesDFD = readIntArray(dis, scCount);
	scOldCurrenciesNumericCode = readIntArray(dis, scCount);
	scNewCurrenciesNumericCode = readIntArray(dis, scCount);
	int ocCount = dis.readInt();
	otherCurrencies = dis.readUTF();
	otherCurrenciesDFD = readIntArray(dis, ocCount);
	otherCurrenciesNumericCode = readIntArray(dis, ocCount);
	}
	} catch (IOException e) {
	throw new InternalError(e);
	}

	// look for the properties file for overrides
	String propsFile = System.getProperty("java.util.currency.data");
	if (propsFile == null) {
	propsFile = homeDir + File.separator + "lib" +
	File.separator + "currency.properties";
	}
	try {
	File propFile = new File(propsFile);
	if (propFile.exists()) {
	Properties props = new Properties();
	try (FileReader fr = new FileReader(propFile)) {
	props.load(fr);
	}
	Set<String> keys = props.stringPropertyNames();
	Pattern propertiesPattern =
	Pattern.compile("([A-Z]{3})\\s,\\s(\\d{3})\\s,\\s" +
	"(\\d+)\\s,?\\s(\\d{4}-\\d{2}-\\d{2}T\\d{2}:" +
	"\\d{2}:\\d{2})?");
	for (String key : keys) {
	replaceCurrencyData(propertiesPattern,
	key.toUpperCase(Locale.ROOT),
	props.getProperty(key).toUpperCase(Locale.ROOT));
	}
	}
	} catch (IOException e) {
	info("currency.properties is ignored because of an IOException", e);
	}
	return null;
	}
	});
	}

	/**
	* Constants for retrieving localized names from the name providers.
	*/
	private static final int SYMBOL = 0;
	private static final int DISPLAYNAME = 1;


	/**
	* Constructs a <code>Currency</code> instance. The constructor is private
	* so that we can insure that there's never more than one instance for a
	* given currency.
	*/
	private Currency(String currencyCode, int defaultFractionDigits, int numericCode) {
	this.currencyCode = currencyCode;
	this.defaultFractionDigits = defaultFractionDigits;
	this.numericCode = numericCode;
	}

	/**
	* Returns the <code>Currency</code> instance for the given currency code.
	*
	* @param currencyCode the ISO 4217 code of the currency
	* @return the <code>Currency</code> instance for the given currency code
	* @exception NullPointerException if <code>currencyCode</code> is null
	* @exception IllegalArgumentException if <code>currencyCode</code> is not
	* a supported ISO 4217 code.
	*/
	public static Currency getInstance(String currencyCode) {
	return getInstance(currencyCode, Integer.MIN_VALUE, 0);
	}

	private static Currency getInstance(String currencyCode, int defaultFractionDigits,
	int numericCode) {
	// Try to look up the currency code in the instances table.
	// This does the null pointer check as a side effect.
	// Also, if there already is an entry, the currencyCode must be valid.
	Currency instance = instances.get(currencyCode);
	if (instance != null) {
	return instance;
	}

	if (defaultFractionDigits == Integer.MIN_VALUE) {
	// Currency code not internally generated, need to verify first
	// A currency code must have 3 characters and exist in the main table
	// or in the list of other currencies.
	if (currencyCode.length() != 3) {
	throw new IllegalArgumentException();
	}
	char char1 = currencyCode.charAt(0);
	char char2 = currencyCode.charAt(1);
	int tableEntry = getMainTableEntry(char1, char2);
	if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
	&& tableEntry != INVALID_COUNTRY_ENTRY
	&& currencyCode.charAt(2) - 'A' == (tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK)) {
	defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
	numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
	} else {
	// Check for '-' separately so we don't get false hits in the table.
	if (currencyCode.charAt(2) == '-') {
	throw new IllegalArgumentException();
	}
	int index = otherCurrencies.indexOf(currencyCode);
	if (index == -1) {
	throw new IllegalArgumentException();
	}
	defaultFractionDigits = otherCurrenciesDFD[index / 4];
	numericCode = otherCurrenciesNumericCode[index / 4];
	}
	}

	Currency currencyVal =
	new Currency(currencyCode, defaultFractionDigits, numericCode);
	instance = instances.putIfAbsent(currencyCode, currencyVal);
	return (instance != null ? instance : currencyVal);
	}

	/**
	* Returns the <code>Currency</code> instance for the country of the
	* given locale. The language and variant components of the locale
	* are ignored. The result may vary over time, as countries change their
	* currencies. For example, for the original member countries of the
	* European Monetary Union, the method returns the old national currencies
	* until December 31, 2001, and the Euro from January 1, 2002, local time
	* of the respective countries.
	* <p>
	* The method returns <code>null</code> for territories that don't
	* have a currency, such as Antarctica.
	*
	* @param locale the locale for whose country a <code>Currency</code>
	* instance is needed
	* @return the <code>Currency</code> instance for the country of the given
	* locale, or {@code null}
	* @exception NullPointerException if <code>locale</code> or its country
	* code is {@code null}
	* @exception IllegalArgumentException if the country of the given {@code locale}
	* is not a supported ISO 3166 country code.
	*/
	public static Currency getInstance(Locale locale) {
	String country = locale.getCountry();
	if (country == null) {
	throw new NullPointerException();
	}

	if (country.length() != 2) {
	throw new IllegalArgumentException();
	}

	char char1 = country.charAt(0);
	char char2 = country.charAt(1);
	int tableEntry = getMainTableEntry(char1, char2);
	if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
	&& tableEntry != INVALID_COUNTRY_ENTRY) {
	char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
	int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
	int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
	StringBuilder sb = new StringBuilder(country);
	sb.append(finalChar);
	return getInstance(sb.toString(), defaultFractionDigits, numericCode);
	} else {
	// special cases
	if (tableEntry == INVALID_COUNTRY_ENTRY) {
	throw new IllegalArgumentException();
	}
	if (tableEntry == COUNTRY_WITHOUT_CURRENCY_ENTRY) {
	return null;
	} else {
	int index = (tableEntry & SPECIAL_CASE_COUNTRY_INDEX_MASK) - SPECIAL_CASE_COUNTRY_INDEX_DELTA;
	if (scCutOverTimes[index] == Long.MAX_VALUE \|\| System.currentTimeMillis() < scCutOverTimes[index]) {
	return getInstance(scOldCurrencies[index], scOldCurrenciesDFD[index],
	scOldCurrenciesNumericCode[index]);
	} else {
	return getInstance(scNewCurrencies[index], scNewCurrenciesDFD[index],
	scNewCurrenciesNumericCode[index]);
	}
	}
	}
	}

	/**
	* Gets the set of available currencies. The returned set of currencies
	* contains all of the available currencies, which may include currencies
	* that represent obsolete ISO 4217 codes. The set can be modified
	* without affecting the available currencies in the runtime.
	*
	* @return the set of available currencies. If there is no currency
	* available in the runtime, the returned set is empty.
	* @since 1.7
	*/
	public static Set<Currency> getAvailableCurrencies() {
	synchronized(Currency.class) {
	if (available == null) {
	available = new HashSet<>(256);

	// Add simple currencies first
	for (char c1 = 'A'; c1 <= 'Z'; c1 ++) {
	for (char c2 = 'A'; c2 <= 'Z'; c2 ++) {
	int tableEntry = getMainTableEntry(c1, c2);
	if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
	&& tableEntry != INVALID_COUNTRY_ENTRY) {
	char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
	int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
	int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
	StringBuilder sb = new StringBuilder();
	sb.append(c1);
	sb.append(c2);
	sb.append(finalChar);
	available.add(getInstance(sb.toString(), defaultFractionDigits, numericCode));
	}
	}
	}

	// Now add other currencies
	StringTokenizer st = new StringTokenizer(otherCurrencies, "-");
	while (st.hasMoreElements()) {
	available.add(getInstance((String)st.nextElement()));
	}
	}
	}

	@SuppressWarnings("unchecked")
	Set<Currency> result = (Set<Currency>) available.clone();
	return result;
	}

	/**
	* Gets the ISO 4217 currency code of this currency.
	*
	* @return the ISO 4217 currency code of this currency.
	*/
	public String getCurrencyCode() {
	return currencyCode;
	}

	/**
	* Gets the symbol of this currency for the default
	* {@link Locale.Category#DISPLAY DISPLAY} locale.
	* For example, for the US Dollar, the symbol is "$" if the default
	* locale is the US, while for other locales it may be "US$". If no
	* symbol can be determined, the ISO 4217 currency code is returned.
	* <p>
	* This is equivalent to calling
	* {@link #getSymbol(Locale)
	* getSymbol(Locale.getDefault(Locale.Category.DISPLAY))}.
	*
	* @return the symbol of this currency for the default
	* {@link Locale.Category#DISPLAY DISPLAY} locale
	*/
	public String getSymbol() {
	return getSymbol(Locale.getDefault(Locale.Category.DISPLAY));
	}

	/**
	* Gets the symbol of this currency for the specified locale.
	* For example, for the US Dollar, the symbol is "$" if the specified
	* locale is the US, while for other locales it may be "US$". If no
	* symbol can be determined, the ISO 4217 currency code is returned.
	*
	* @param locale the locale for which a display name for this currency is
	* needed
	* @return the symbol of this currency for the specified locale
	* @exception NullPointerException if <code>locale</code> is null
	*/
	public String getSymbol(Locale locale) {
	LocaleServiceProviderPool pool =
	LocaleServiceProviderPool.getPool(CurrencyNameProvider.class);
	String symbol = pool.getLocalizedObject(
	CurrencyNameGetter.INSTANCE,
	locale, currencyCode, SYMBOL);
	if (symbol != null) {
	return symbol;
	}

	// use currency code as symbol of last resort
	return currencyCode;
	}

	/**
	* Gets the default number of fraction digits used with this currency.
	* For example, the default number of fraction digits for the Euro is 2,
	* while for the Japanese Yen it's 0.
	* In the case of pseudo-currencies, such as IMF Special Drawing Rights,
	* -1 is returned.
	*
	* @return the default number of fraction digits used with this currency
	*/
	public int getDefaultFractionDigits() {
	return defaultFractionDigits;
	}

	/**
	* Returns the ISO 4217 numeric code of this currency.
	*
	* @return the ISO 4217 numeric code of this currency
	* @since 1.7
	*/
	public int getNumericCode() {
	return numericCode;
	}

	/**
	* Gets the name that is suitable for displaying this currency for
	* the default {@link Locale.Category#DISPLAY DISPLAY} locale.
	* If there is no suitable display name found
	* for the default locale, the ISO 4217 currency code is returned.
	* <p>
	* This is equivalent to calling
	* {@link #getDisplayName(Locale)
	* getDisplayName(Locale.getDefault(Locale.Category.DISPLAY))}.
	*
	* @return the display name of this currency for the default
	* {@link Locale.Category#DISPLAY DISPLAY} locale
	* @since 1.7
	*/
	public String getDisplayName() {
	return getDisplayName(Locale.getDefault(Locale.Category.DISPLAY));
	}

	/**
	* Gets the name that is suitable for displaying this currency for
	* the specified locale. If there is no suitable display name found
	* for the specified locale, the ISO 4217 currency code is returned.
	*
	* @param locale the locale for which a display name for this currency is
	* needed
	* @return the display name of this currency for the specified locale
	* @exception NullPointerException if <code>locale</code> is null
	* @since 1.7
	*/
	public String getDisplayName(Locale locale) {
	LocaleServiceProviderPool pool =
	LocaleServiceProviderPool.getPool(CurrencyNameProvider.class);
	String result = pool.getLocalizedObject(
	CurrencyNameGetter.INSTANCE,
	locale, currencyCode, DISPLAYNAME);
	if (result != null) {
	return result;
	}

	// use currency code as symbol of last resort
	return currencyCode;
	}

	/**
	* Returns the ISO 4217 currency code of this currency.
	*
	* @return the ISO 4217 currency code of this currency
	*/
	@Override
	public String toString() {
	return currencyCode;
	}

	/**
	* Resolves instances being deserialized to a single instance per currency.
	*/
	private Object readResolve() {
	return getInstance(currencyCode);
	}

	/**
	* Gets the main table entry for the country whose country code consists
	* of char1 and char2.
	*/
	private static int getMainTableEntry(char char1, char char2) {
	if (char1 < 'A' \|\| char1 > 'Z' \|\| char2 < 'A' \|\| char2 > 'Z') {
	throw new IllegalArgumentException();
	}
	return mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')];
	}

	/**
	* Sets the main table entry for the country whose country code consists
	* of char1 and char2.
	*/
	private static void setMainTableEntry(char char1, char char2, int entry) {
	if (char1 < 'A' \|\| char1 > 'Z' \|\| char2 < 'A' \|\| char2 > 'Z') {
	throw new IllegalArgumentException();
	}
	mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')] = entry;
	}

	/**
	* Obtains a localized currency names from a CurrencyNameProvider
	* implementation.
	*/
	private static class CurrencyNameGetter
	implements LocaleServiceProviderPool.LocalizedObjectGetter<CurrencyNameProvider,
	String> {
	private static final CurrencyNameGetter INSTANCE = new CurrencyNameGetter();

	@Override
	public String getObject(CurrencyNameProvider currencyNameProvider,
	Locale locale,
	String key,
	Object... params) {
	assert params.length == 1;
	int type = (Integer)params[0];

	switch(type) {
	case SYMBOL:
	return currencyNameProvider.getSymbol(key, locale);
	case DISPLAYNAME:
	return currencyNameProvider.getDisplayName(key, locale);
	default:
	assert false; // shouldn't happen
	}

	return null;
	}
	}

	private static int[] readIntArray(DataInputStream dis, int count) throws IOException {
	int[] ret = new int[count];
	for (int i = 0; i < count; i++) {
	ret[i] = dis.readInt();
	}

	return ret;
	}

	private static long[] readLongArray(DataInputStream dis, int count) throws IOException {
	long[] ret = new long[count];
	for (int i = 0; i < count; i++) {
	ret[i] = dis.readLong();
	}

	return ret;
	}

	private static String[] readStringArray(DataInputStream dis, int count) throws IOException {
	String[] ret = new String[count];
	for (int i = 0; i < count; i++) {
	ret[i] = dis.readUTF();
	}

	return ret;
	}

	/**
	* Replaces currency data found in the currencydata.properties file
	*
	* @param pattern regex pattern for the properties
	* @param ctry country code
	* @param curdata currency data. This is a comma separated string that
	* consists of "three-letter alphabet code", "three-digit numeric code",
	* and "one-digit (0-9) default fraction digit".
	* For example, "JPZ,392,0".
	* An optional UTC date can be appended to the string (comma separated)
	* to allow a currency change take effect after date specified.
	* For example, "JP=JPZ,999,0,2014-01-01T00:00:00" has no effect unless
	* UTC time is past 1st January 2014 00:00:00 GMT.
	*/
	private static void replaceCurrencyData(Pattern pattern, String ctry, String curdata) {

	if (ctry.length() != 2) {
	// ignore invalid country code
	info("currency.properties entry for " + ctry +
	" is ignored because of the invalid country code.", null);
	return;
	}

	Matcher m = pattern.matcher(curdata);
	if (!m.find() \|\| (m.group(4) == null && countOccurrences(curdata, ',') >= 3)) {
	// format is not recognized. ignore the data
	// if group(4) date string is null and we've 4 values, bad date value
	info("currency.properties entry for " + ctry +
	" ignored because the value format is not recognized.", null);
	return;
	}

	try {
	if (m.group(4) != null && !isPastCutoverDate(m.group(4))) {
	info("currency.properties entry for " + ctry +
	" ignored since cutover date has not passed :" + curdata, null);
	return;
	}
	} catch (ParseException ex) {
	info("currency.properties entry for " + ctry +
	" ignored since exception encountered :" + ex.getMessage(), null);
	return;
	}

	String code = m.group(1);
	int numeric = Integer.parseInt(m.group(2));
	int entry = numeric << NUMERIC_CODE_SHIFT;
	int fraction = Integer.parseInt(m.group(3));
	if (fraction > SIMPLE_CASE_COUNTRY_MAX_DEFAULT_DIGITS) {
	info("currency.properties entry for " + ctry +
	" ignored since the fraction is more than " +
	SIMPLE_CASE_COUNTRY_MAX_DEFAULT_DIGITS + ":" + curdata, null);
	return;
	}

	int index;
	for (index = 0; index < scOldCurrencies.length; index++) {
	if (scOldCurrencies[index].equals(code)) {
	break;
	}
	}

	if (index == scOldCurrencies.length) {
	// simple case
	entry \|= (fraction << SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT) \|
	(code.charAt(2) - 'A');
	} else {
	// special case
	entry \|= SPECIAL_CASE_COUNTRY_MASK \|
	(index + SPECIAL_CASE_COUNTRY_INDEX_DELTA);
	}
	setMainTableEntry(ctry.charAt(0), ctry.charAt(1), entry);
	}

	private static boolean isPastCutoverDate(String s) throws ParseException {
	SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.ROOT);
	format.setTimeZone(TimeZone.getTimeZone("UTC"));
	format.setLenient(false);
	long time = format.parse(s.trim()).getTime();
	return System.currentTimeMillis() > time;

	}

	private static int countOccurrences(String value, char match) {
	int count = 0;
	for (char c : value.toCharArray()) {
	if (c == match) {
	++count;
	}
	}
	return count;
	}

	private static void info(String message, Throwable t) {
	PlatformLogger logger = PlatformLogger.getLogger("java.util.Currency");
	if (logger.isLoggable(PlatformLogger.Level.INFO)) {
	if (t != null) {
	logger.info(message, t);
	} else {
	logger.info(message);
	}
	}
	}
	}

Back to index...