/*
 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

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年01月01日T00:00:00
 * </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
 // - 26*26 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年01月01日T00:00:00" 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);
 }
 }
 }
}