1 /*
   2  * Copyright (c) 2000, 2018, Oracle and/or its affiliates. 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.util;
  27 
  28 import java.io.BufferedInputStream;
  29 import java.io.DataInputStream;
  30 import java.io.File;
  31 import java.io.FileReader;
  32 import java.io.InputStream;
  33 import java.io.IOException;
  34 import java.io.Serializable;
  35 import java.security.AccessController;
  36 import java.security.PrivilegedAction;
  37 import java.text.ParseException;
  38 import java.text.SimpleDateFormat;
  39 import java.util.concurrent.ConcurrentHashMap;
  40 import java.util.concurrent.ConcurrentMap;
  41 import java.util.regex.Pattern;
  42 import java.util.regex.Matcher;
  43 import java.util.spi.CurrencyNameProvider;
  44 import java.util.stream.Collectors;
  45 
  46 import jdk.internal.util.StaticProperty;
  47 import sun.util.locale.provider.CalendarDataUtility;
  48 import sun.util.locale.provider.LocaleServiceProviderPool;
  49 import sun.util.logging.PlatformLogger;
  50 
  51 
  52 /**
  53  * Represents a currency. Currencies are identified by their ISO 4217 currency
  54  * codes. Visit the <a href="http://www.iso.org/iso/home/standards/currency_codes.htm">
  55  * ISO web site</a> for more information.
  56  * <p>
  57  * The class is designed so that there's never more than one
  58  * <code>Currency</code> instance for any given currency. Therefore, there's
  59  * no public constructor. You obtain a <code>Currency</code> instance using
  60  * the <code>getInstance</code> methods.
  61  * <p>
  62  * Users can supersede the Java runtime currency data by means of the system
  63  * property {@systemProperty java.util.currency.data}. If this system property is
  64  * defined then its value is the location of a properties file, the contents of
  65  * which are key/value pairs of the ISO 3166 country codes and the ISO 4217
  66  * currency data respectively.  The value part consists of three ISO 4217 values
  67  * of a currency, i.e., an alphabetic code, a numeric code, and a minor unit.
  68  * Those three ISO 4217 values are separated by commas.
  69  * The lines which start with '#'s are considered comment lines. An optional UTC
  70  * timestamp may be specified per currency entry if users need to specify a
  71  * cutover date indicating when the new data comes into effect. The timestamp is
  72  * appended to the end of the currency properties and uses a comma as a separator.
  73  * If a UTC datestamp is present and valid, the JRE will only use the new currency
  74  * properties if the current UTC date is later than the date specified at class
  75  * loading time. The format of the timestamp must be of ISO 8601 format :
  76  * {@code 'yyyy-MM-dd'T'HH:mm:ss'}. For example,
  77  * <p>
  78  * <code>
  79  * #Sample currency properties<br>
  80  * JP=JPZ,999,0
  81  * </code>
  82  * <p>
  83  * will supersede the currency data for Japan. If JPZ is one of the existing
  84  * ISO 4217 currency code referred by other countries, the existing
  85  * JPZ currency data is updated with the given numeric code and minor
  86  * unit value.
  87  *
  88  * <p>
  89  * <code>
  90  * #Sample currency properties with cutover date<br>
  91  * JP=JPZ,999,0,2014-01-01T00:00:00
  92  * </code>
  93  * <p>
  94  * will supersede the currency data for Japan if {@code Currency} class is loaded after
  95  * 1st January 2014 00:00:00 GMT.
  96  * <p>
  97  * Where syntactically malformed entries are encountered, the entry is ignored
  98  * and the remainder of entries in file are processed. For instances where duplicate
  99  * country code entries exist, the behavior of the Currency information for that
 100  * {@code Currency} is undefined and the remainder of entries in file are processed.
 101  * <p>
 102  * If multiple property entries with same currency code but different numeric code
 103  * and/or minor unit are encountered, those entries are ignored and the remainder
 104  * of entries in file are processed.
 105  *
 106  * <p>
 107  * It is recommended to use {@link java.math.BigDecimal} class while dealing
 108  * with {@code Currency} or monetary values as it provides better handling of floating
 109  * point numbers and their operations.
 110  *
 111  * @see java.math.BigDecimal
 112  * @since 1.4
 113  */
 114 public final class Currency implements Serializable {
 115 
 116     @java.io.Serial
 117     private static final long serialVersionUID = -158308464356906721L;
 118 
 119     /**
 120      * ISO 4217 currency code for this currency.
 121      *
 122      * @serial
 123      */
 124     private final String currencyCode;
 125 
 126     /**
 127      * Default fraction digits for this currency.
 128      * Set from currency data tables.
 129      */
 130     private final transient int defaultFractionDigits;
 131 
 132     /**
 133      * ISO 4217 numeric code for this currency.
 134      * Set from currency data tables.
 135      */
 136     private final transient int numericCode;
 137 
 138 
 139     // class data: instance map
 140 
 141     private static ConcurrentMap<String, Currency> instances = new ConcurrentHashMap<>(7);
 142     private static HashSet<Currency> available;
 143 
 144     // Class data: currency data obtained from currency.data file.
 145     // Purpose:
 146     // - determine valid country codes
 147     // - determine valid currency codes
 148     // - map country codes to currency codes
 149     // - obtain default fraction digits for currency codes
 150     //
 151     // sc = special case; dfd = default fraction digits
 152     // Simple countries are those where the country code is a prefix of the
 153     // currency code, and there are no known plans to change the currency.
 154     //
 155     // table formats:
 156     // - mainTable:
 157     //   - maps country code to 32-bit int
 158     //   - 26*26 entries, corresponding to [A-Z]*[A-Z]
 159     //   - \u007F -> not valid country
 160     //   - bits 20-31: unused
 161     //   - bits 10-19: numeric code (0 to 1023)
 162     //   - bit 9: 1 - special case, bits 0-4 indicate which one
 163     //            0 - simple country, bits 0-4 indicate final char of currency code
 164     //   - bits 5-8: fraction digits for simple countries, 0 for special cases
 165     //   - bits 0-4: final char for currency code for simple country, or ID of special case
 166     // - special case IDs:
 167     //   - 0: country has no currency
 168     //   - other: index into specialCasesList
 169 
 170     static int formatVersion;
 171     static int dataVersion;
 172     static int[] mainTable;
 173     static List<SpecialCaseEntry> specialCasesList;
 174     static List<OtherCurrencyEntry> otherCurrenciesList;
 175 
 176     // handy constants - must match definitions in GenerateCurrencyData
 177     // magic number
 178     private static final int MAGIC_NUMBER = 0x43757244;
 179     // number of characters from A to Z
 180     private static final int A_TO_Z = ('Z' - 'A') + 1;
 181     // entry for invalid country codes
 182     private static final int INVALID_COUNTRY_ENTRY = 0x0000007F;
 183     // entry for countries without currency
 184     private static final int COUNTRY_WITHOUT_CURRENCY_ENTRY = 0x00000200;
 185     // mask for simple case country entries
 186     private static final int SIMPLE_CASE_COUNTRY_MASK = 0x00000000;
 187     // mask for simple case country entry final character
 188     private static final int SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK = 0x0000001F;
 189     // mask for simple case country entry default currency digits
 190     private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK = 0x000001E0;
 191     // shift count for simple case country entry default currency digits
 192     private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT = 5;
 193     // maximum number for simple case country entry default currency digits
 194     private static final int SIMPLE_CASE_COUNTRY_MAX_DEFAULT_DIGITS = 9;
 195     // mask for special case country entries
 196     private static final int SPECIAL_CASE_COUNTRY_MASK = 0x00000200;
 197     // mask for special case country index
 198     private static final int SPECIAL_CASE_COUNTRY_INDEX_MASK = 0x0000001F;
 199     // delta from entry index component in main table to index into special case tables
 200     private static final int SPECIAL_CASE_COUNTRY_INDEX_DELTA = 1;
 201     // mask for distinguishing simple and special case countries
 202     private static final int COUNTRY_TYPE_MASK = SIMPLE_CASE_COUNTRY_MASK | SPECIAL_CASE_COUNTRY_MASK;
 203     // mask for the numeric code of the currency
 204     private static final int NUMERIC_CODE_MASK = 0x000FFC00;
 205     // shift count for the numeric code of the currency
 206     private static final int NUMERIC_CODE_SHIFT = 10;
 207 
 208     // Currency data format version
 209     private static final int VALID_FORMAT_VERSION = 3;
 210 
 211     static {
 212         AccessController.doPrivileged(new PrivilegedAction<>() {
 213             @Override
 214             public Void run() {
 215                 try {
 216                     try (InputStream in = getClass().getResourceAsStream("/java/util/currency.data")) {
 217                         if (in == null) {
 218                             throw new InternalError("Currency data not found");
 219                         }
 220                         DataInputStream dis = new DataInputStream(new BufferedInputStream(in));
 221                         if (dis.readInt() != MAGIC_NUMBER) {
 222                             throw new InternalError("Currency data is possibly corrupted");
 223                         }
 224                         formatVersion = dis.readInt();
 225                         if (formatVersion != VALID_FORMAT_VERSION) {
 226                             throw new InternalError("Currency data format is incorrect");
 227                         }
 228                         dataVersion = dis.readInt();
 229                         mainTable = readIntArray(dis, A_TO_Z * A_TO_Z);
 230                         int scCount = dis.readInt();
 231                         specialCasesList = readSpecialCases(dis, scCount);
 232                         int ocCount = dis.readInt();
 233                         otherCurrenciesList = readOtherCurrencies(dis, ocCount);
 234                     }
 235                 } catch (IOException e) {
 236                     throw new InternalError(e);
 237                 }
 238 
 239                 // look for the properties file for overrides
 240                 String propsFile = System.getProperty("java.util.currency.data");
 241                 if (propsFile == null) {
 242                     propsFile = StaticProperty.javaHome() + File.separator + "lib" +
 243                         File.separator + "currency.properties";
 244                 }
 245                 try {
 246                     File propFile = new File(propsFile);
 247                     if (propFile.exists()) {
 248                         Properties props = new Properties();
 249                         try (FileReader fr = new FileReader(propFile)) {
 250                             props.load(fr);
 251                         }
 252                         Pattern propertiesPattern =
 253                                 Pattern.compile("([A-Z]{3})\\s*,\\s*(\\d{3})\\s*,\\s*" +
 254                                         "(\\d+)\\s*,?\\s*(\\d{4}-\\d{2}-\\d{2}T\\d{2}:" +
 255                                         "\\d{2}:\\d{2})?");
 256                         List<CurrencyProperty> currencyEntries
 257                                 = getValidCurrencyData(props, propertiesPattern);
 258                         currencyEntries.forEach(Currency::replaceCurrencyData);
 259                     }
 260                 } catch (IOException e) {
 261                     CurrencyProperty.info("currency.properties is ignored"
 262                             + " because of an IOException", e);
 263                 }
 264                 return null;
 265             }
 266         });
 267     }
 268 
 269     /**
 270      * Constants for retrieving localized names from the name providers.
 271      */
 272     private static final int SYMBOL = 0;
 273     private static final int DISPLAYNAME = 1;
 274 
 275 
 276     /**
 277      * Constructs a <code>Currency</code> instance. The constructor is private
 278      * so that we can insure that there's never more than one instance for a
 279      * given currency.
 280      */
 281     private Currency(String currencyCode, int defaultFractionDigits, int numericCode) {
 282         this.currencyCode = currencyCode;
 283         this.defaultFractionDigits = defaultFractionDigits;
 284         this.numericCode = numericCode;
 285     }
 286 
 287     /**
 288      * Returns the <code>Currency</code> instance for the given currency code.
 289      *
 290      * @param currencyCode the ISO 4217 code of the currency
 291      * @return the <code>Currency</code> instance for the given currency code
 292      * @exception NullPointerException if <code>currencyCode</code> is null
 293      * @exception IllegalArgumentException if <code>currencyCode</code> is not
 294      * a supported ISO 4217 code.
 295      */
 296     public static Currency getInstance(String currencyCode) {
 297         return getInstance(currencyCode, Integer.MIN_VALUE, 0);
 298     }
 299 
 300     private static Currency getInstance(String currencyCode, int defaultFractionDigits,
 301         int numericCode) {
 302         // Try to look up the currency code in the instances table.
 303         // This does the null pointer check as a side effect.
 304         // Also, if there already is an entry, the currencyCode must be valid.
 305         Currency instance = instances.get(currencyCode);
 306         if (instance != null) {
 307             return instance;
 308         }
 309 
 310         if (defaultFractionDigits == Integer.MIN_VALUE) {
 311             // Currency code not internally generated, need to verify first
 312             // A currency code must have 3 characters and exist in the main table
 313             // or in the list of other currencies.
 314             boolean found = false;
 315             if (currencyCode.length() != 3) {
 316                 throw new IllegalArgumentException();
 317             }
 318             char char1 = currencyCode.charAt(0);
 319             char char2 = currencyCode.charAt(1);
 320             int tableEntry = getMainTableEntry(char1, char2);
 321             if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
 322                     && tableEntry != INVALID_COUNTRY_ENTRY
 323                     && currencyCode.charAt(2) - 'A' == (tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK)) {
 324                 defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
 325                 numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
 326                 found = true;
 327             } else { //special case
 328                 int[] fractionAndNumericCode = SpecialCaseEntry.findEntry(currencyCode);
 329                 if (fractionAndNumericCode != null) {
 330                     defaultFractionDigits = fractionAndNumericCode[0];
 331                     numericCode = fractionAndNumericCode[1];
 332                     found = true;
 333                 }
 334             }
 335 
 336             if (!found) {
 337                 OtherCurrencyEntry ocEntry = OtherCurrencyEntry.findEntry(currencyCode);
 338                 if (ocEntry == null) {
 339                     throw new IllegalArgumentException();
 340                 }
 341                 defaultFractionDigits = ocEntry.fraction;
 342                 numericCode = ocEntry.numericCode;
 343             }
 344         }
 345 
 346         Currency currencyVal =
 347             new Currency(currencyCode, defaultFractionDigits, numericCode);
 348         instance = instances.putIfAbsent(currencyCode, currencyVal);
 349         return (instance != null ? instance : currencyVal);
 350     }
 351 
 352     /**
 353      * Returns the <code>Currency</code> instance for the country of the
 354      * given locale. The language and variant components of the locale
 355      * are ignored. The result may vary over time, as countries change their
 356      * currencies. For example, for the original member countries of the
 357      * European Monetary Union, the method returns the old national currencies
 358      * until December 31, 2001, and the Euro from January 1, 2002, local time
 359      * of the respective countries.
 360      * <p>
 361      * If the specified {@code locale} contains "cu" and/or "rg"
 362      * <a href="./Locale.html#def_locale_extension">Unicode extensions</a>,
 363      * the instance returned from this method reflects
 364      * the values specified with those extensions. If both "cu" and "rg" are
 365      * specified, the currency from the "cu" extension supersedes the implicit one
 366      * from the "rg" extension.
 367      * <p>
 368      * The method returns <code>null</code> for territories that don't
 369      * have a currency, such as Antarctica.
 370      *
 371      * @param locale the locale for whose country a <code>Currency</code>
 372      * instance is needed
 373      * @return the <code>Currency</code> instance for the country of the given
 374      * locale, or {@code null}
 375      * @exception NullPointerException if <code>locale</code>
 376      * is {@code null}
 377      * @exception IllegalArgumentException if the country of the given {@code locale}
 378      * is not a supported ISO 3166 country code.
 379      */
 380     public static Currency getInstance(Locale locale) {
 381         // check for locale overrides
 382         String override = locale.getUnicodeLocaleType("cu");
 383         if (override != null) {
 384             try {
 385                 return getInstance(override.toUpperCase(Locale.ROOT));
 386             } catch (IllegalArgumentException iae) {
 387                 // override currency is invalid. Fall through.
 388             }
 389         }
 390 
 391         String country = CalendarDataUtility.findRegionOverride(locale).getCountry();
 392 
 393         if (country == null || !country.matches("^[a-zA-Z]{2}$")) {
 394             throw new IllegalArgumentException();
 395         }
 396 
 397         char char1 = country.charAt(0);
 398         char char2 = country.charAt(1);
 399         int tableEntry = getMainTableEntry(char1, char2);
 400         if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
 401                     && tableEntry != INVALID_COUNTRY_ENTRY) {
 402             char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
 403             int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
 404             int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
 405             StringBuilder sb = new StringBuilder(country);
 406             sb.append(finalChar);
 407             return getInstance(sb.toString(), defaultFractionDigits, numericCode);
 408         } else {
 409             // special cases
 410             if (tableEntry == INVALID_COUNTRY_ENTRY) {
 411                 throw new IllegalArgumentException();
 412             }
 413             if (tableEntry == COUNTRY_WITHOUT_CURRENCY_ENTRY) {
 414                 return null;
 415             } else {
 416                 int index = SpecialCaseEntry.toIndex(tableEntry);
 417                 SpecialCaseEntry scEntry = specialCasesList.get(index);
 418                 if (scEntry.cutOverTime == Long.MAX_VALUE
 419                         || System.currentTimeMillis() < scEntry.cutOverTime) {
 420                     return getInstance(scEntry.oldCurrency,
 421                             scEntry.oldCurrencyFraction,
 422                             scEntry.oldCurrencyNumericCode);
 423                 } else {
 424                     return getInstance(scEntry.newCurrency,
 425                             scEntry.newCurrencyFraction,
 426                             scEntry.newCurrencyNumericCode);
 427                 }
 428             }
 429         }
 430     }
 431 
 432     /**
 433      * Gets the set of available currencies.  The returned set of currencies
 434      * contains all of the available currencies, which may include currencies
 435      * that represent obsolete ISO 4217 codes.  The set can be modified
 436      * without affecting the available currencies in the runtime.
 437      *
 438      * @return the set of available currencies.  If there is no currency
 439      *    available in the runtime, the returned set is empty.
 440      * @since 1.7
 441      */
 442     public static Set<Currency> getAvailableCurrencies() {
 443         synchronized(Currency.class) {
 444             if (available == null) {
 445                 available = new HashSet<>(256);
 446 
 447                 // Add simple currencies first
 448                 for (char c1 = 'A'; c1 <= 'Z'; c1 ++) {
 449                     for (char c2 = 'A'; c2 <= 'Z'; c2 ++) {
 450                         int tableEntry = getMainTableEntry(c1, c2);
 451                         if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
 452                              && tableEntry != INVALID_COUNTRY_ENTRY) {
 453                             char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
 454                             int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
 455                             int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
 456                             StringBuilder sb = new StringBuilder();
 457                             sb.append(c1);
 458                             sb.append(c2);
 459                             sb.append(finalChar);
 460                             available.add(getInstance(sb.toString(), defaultFractionDigits, numericCode));
 461                         } else if ((tableEntry & COUNTRY_TYPE_MASK) == SPECIAL_CASE_COUNTRY_MASK
 462                                 && tableEntry != INVALID_COUNTRY_ENTRY
 463                                 && tableEntry != COUNTRY_WITHOUT_CURRENCY_ENTRY) {
 464                             int index = SpecialCaseEntry.toIndex(tableEntry);
 465                             SpecialCaseEntry scEntry = specialCasesList.get(index);
 466 
 467                             if (scEntry.cutOverTime == Long.MAX_VALUE
 468                                     || System.currentTimeMillis() < scEntry.cutOverTime) {
 469                                 available.add(getInstance(scEntry.oldCurrency,
 470                                         scEntry.oldCurrencyFraction,
 471                                         scEntry.oldCurrencyNumericCode));
 472                             } else {
 473                                 available.add(getInstance(scEntry.newCurrency,
 474                                         scEntry.newCurrencyFraction,
 475                                         scEntry.newCurrencyNumericCode));
 476                             }
 477                         }
 478                     }
 479                 }
 480 
 481                 // Now add other currencies
 482                 for (OtherCurrencyEntry entry : otherCurrenciesList) {
 483                     available.add(getInstance(entry.currencyCode));
 484                 }
 485             }
 486         }
 487 
 488         @SuppressWarnings("unchecked")
 489         Set<Currency> result = (Set<Currency>) available.clone();
 490         return result;
 491     }
 492 
 493     /**
 494      * Gets the ISO 4217 currency code of this currency.
 495      *
 496      * @return the ISO 4217 currency code of this currency.
 497      */
 498     public String getCurrencyCode() {
 499         return currencyCode;
 500     }
 501 
 502     /**
 503      * Gets the symbol of this currency for the default
 504      * {@link Locale.Category#DISPLAY DISPLAY} locale.
 505      * For example, for the US Dollar, the symbol is "$" if the default
 506      * locale is the US, while for other locales it may be "US$". If no
 507      * symbol can be determined, the ISO 4217 currency code is returned.
 508      * <p>
 509      * If the default {@link Locale.Category#DISPLAY DISPLAY} locale
 510      * contains "rg" (region override)
 511      * <a href="./Locale.html#def_locale_extension">Unicode extension</a>,
 512      * the symbol returned from this method reflects
 513      * the value specified with that extension.
 514      * <p>
 515      * This is equivalent to calling
 516      * {@link #getSymbol(Locale)
 517      *     getSymbol(Locale.getDefault(Locale.Category.DISPLAY))}.
 518      *
 519      * @return the symbol of this currency for the default
 520      *     {@link Locale.Category#DISPLAY DISPLAY} locale
 521      */
 522     public String getSymbol() {
 523         return getSymbol(Locale.getDefault(Locale.Category.DISPLAY));
 524     }
 525 
 526     /**
 527      * Gets the symbol of this currency for the specified locale.
 528      * For example, for the US Dollar, the symbol is "$" if the specified
 529      * locale is the US, while for other locales it may be "US$". If no
 530      * symbol can be determined, the ISO 4217 currency code is returned.
 531      * <p>
 532      * If the specified {@code locale} contains "rg" (region override)
 533      * <a href="./Locale.html#def_locale_extension">Unicode extension</a>,
 534      * the symbol returned from this method reflects
 535      * the value specified with that extension.
 536      *
 537      * @param locale the locale for which a display name for this currency is
 538      * needed
 539      * @return the symbol of this currency for the specified locale
 540      * @exception NullPointerException if <code>locale</code> is null
 541      */
 542     public String getSymbol(Locale locale) {
 543         LocaleServiceProviderPool pool =
 544             LocaleServiceProviderPool.getPool(CurrencyNameProvider.class);
 545         locale = CalendarDataUtility.findRegionOverride(locale);
 546         String symbol = pool.getLocalizedObject(
 547                                 CurrencyNameGetter.INSTANCE,
 548                                 locale, currencyCode, SYMBOL);
 549         if (symbol != null) {
 550             return symbol;
 551         }
 552 
 553         // use currency code as symbol of last resort
 554         return currencyCode;
 555     }
 556 
 557     /**
 558      * Gets the default number of fraction digits used with this currency.
 559      * Note that the number of fraction digits is the same as ISO 4217's
 560      * minor unit for the currency.
 561      * For example, the default number of fraction digits for the Euro is 2,
 562      * while for the Japanese Yen it's 0.
 563      * In the case of pseudo-currencies, such as IMF Special Drawing Rights,
 564      * -1 is returned.
 565      *
 566      * @return the default number of fraction digits used with this currency
 567     */
 568     public int getDefaultFractionDigits() {
 569         return defaultFractionDigits;
 570     }
 571 
 572     /**
 573      * Returns the ISO 4217 numeric code of this currency.
 574      *
 575      * @return the ISO 4217 numeric code of this currency
 576      * @since 1.7
 577      */
 578     public int getNumericCode() {
 579         return numericCode;
 580     }
 581 
 582     /**
 583      * Returns the 3 digit ISO 4217 numeric code of this currency as a {@code String}.
 584      * Unlike {@link #getNumericCode()}, which returns the numeric code as {@code int},
 585      * this method always returns the numeric code as a 3 digit string.
 586      * e.g. a numeric value of 32 would be returned as "032",
 587      * and a numeric value of 6 would be returned as "006".
 588      *
 589      * @return the 3 digit ISO 4217 numeric code of this currency as a {@code String}
 590      * @since 9
 591      */
 592     public String getNumericCodeAsString() {
 593         /* numeric code could be returned as a 3 digit string simply by using
 594            String.format("%03d",numericCode); which uses regex to parse the format,
 595            "%03d" in this case. Parsing a regex gives an extra performance overhead,
 596            so String.format() approach is avoided in this scenario.
 597         */
 598         if (numericCode < 100) {
 599             StringBuilder sb = new StringBuilder();
 600             sb.append('0');
 601             if (numericCode < 10) {
 602                 sb.append('0');
 603             }
 604             return sb.append(numericCode).toString();
 605         }
 606         return String.valueOf(numericCode);
 607     }
 608 
 609     /**
 610      * Gets the name that is suitable for displaying this currency for
 611      * the default {@link Locale.Category#DISPLAY DISPLAY} locale.
 612      * If there is no suitable display name found
 613      * for the default locale, the ISO 4217 currency code is returned.
 614      * <p>
 615      * This is equivalent to calling
 616      * {@link #getDisplayName(Locale)
 617      *     getDisplayName(Locale.getDefault(Locale.Category.DISPLAY))}.
 618      *
 619      * @return the display name of this currency for the default
 620      *     {@link Locale.Category#DISPLAY DISPLAY} locale
 621      * @since 1.7
 622      */
 623     public String getDisplayName() {
 624         return getDisplayName(Locale.getDefault(Locale.Category.DISPLAY));
 625     }
 626 
 627     /**
 628      * Gets the name that is suitable for displaying this currency for
 629      * the specified locale.  If there is no suitable display name found
 630      * for the specified locale, the ISO 4217 currency code is returned.
 631      *
 632      * @param locale the locale for which a display name for this currency is
 633      * needed
 634      * @return the display name of this currency for the specified locale
 635      * @exception NullPointerException if <code>locale</code> is null
 636      * @since 1.7
 637      */
 638     public String getDisplayName(Locale locale) {
 639         LocaleServiceProviderPool pool =
 640             LocaleServiceProviderPool.getPool(CurrencyNameProvider.class);
 641         String result = pool.getLocalizedObject(
 642                                 CurrencyNameGetter.INSTANCE,
 643                                 locale, currencyCode, DISPLAYNAME);
 644         if (result != null) {
 645             return result;
 646         }
 647 
 648         // use currency code as symbol of last resort
 649         return currencyCode;
 650     }
 651 
 652     /**
 653      * Returns the ISO 4217 currency code of this currency.
 654      *
 655      * @return the ISO 4217 currency code of this currency
 656      */
 657     @Override
 658     public String toString() {
 659         return currencyCode;
 660     }
 661 
 662     /**
 663      * Resolves instances being deserialized to a single instance per currency.
 664      */
 665     @java.io.Serial
 666     private Object readResolve() {
 667         return getInstance(currencyCode);
 668     }
 669 
 670     /**
 671      * Gets the main table entry for the country whose country code consists
 672      * of char1 and char2.
 673      */
 674     private static int getMainTableEntry(char char1, char char2) {
 675         if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
 676             throw new IllegalArgumentException();
 677         }
 678         return mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')];
 679     }
 680 
 681     /**
 682      * Sets the main table entry for the country whose country code consists
 683      * of char1 and char2.
 684      */
 685     private static void setMainTableEntry(char char1, char char2, int entry) {
 686         if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
 687             throw new IllegalArgumentException();
 688         }
 689         mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')] = entry;
 690     }
 691 
 692     /**
 693      * Obtains a localized currency names from a CurrencyNameProvider
 694      * implementation.
 695      */
 696     private static class CurrencyNameGetter
 697         implements LocaleServiceProviderPool.LocalizedObjectGetter<CurrencyNameProvider,
 698                                                                    String> {
 699         private static final CurrencyNameGetter INSTANCE = new CurrencyNameGetter();
 700 
 701         @Override
 702         public String getObject(CurrencyNameProvider currencyNameProvider,
 703                                 Locale locale,
 704                                 String key,
 705                                 Object... params) {
 706             assert params.length == 1;
 707             int type = (Integer)params[0];
 708 
 709             switch(type) {
 710             case SYMBOL:
 711                 return currencyNameProvider.getSymbol(key, locale);
 712             case DISPLAYNAME:
 713                 return currencyNameProvider.getDisplayName(key, locale);
 714             default:
 715                 assert false; // shouldn't happen
 716             }
 717 
 718             return null;
 719         }
 720     }
 721 
 722     private static int[] readIntArray(DataInputStream dis, int count) throws IOException {
 723         int[] ret = new int[count];
 724         for (int i = 0; i < count; i++) {
 725             ret[i] = dis.readInt();
 726         }
 727 
 728         return ret;
 729     }
 730 
 731     private static List<SpecialCaseEntry> readSpecialCases(DataInputStream dis,
 732             int count)
 733             throws IOException {
 734 
 735         List<SpecialCaseEntry> list = new ArrayList<>(count);
 736         long cutOverTime;
 737         String oldCurrency;
 738         String newCurrency;
 739         int oldCurrencyFraction;
 740         int newCurrencyFraction;
 741         int oldCurrencyNumericCode;
 742         int newCurrencyNumericCode;
 743 
 744         for (int i = 0; i < count; i++) {
 745             cutOverTime = dis.readLong();
 746             oldCurrency = dis.readUTF();
 747             newCurrency = dis.readUTF();
 748             oldCurrencyFraction = dis.readInt();
 749             newCurrencyFraction = dis.readInt();
 750             oldCurrencyNumericCode = dis.readInt();
 751             newCurrencyNumericCode = dis.readInt();
 752             SpecialCaseEntry sc = new SpecialCaseEntry(cutOverTime,
 753                     oldCurrency, newCurrency,
 754                     oldCurrencyFraction, newCurrencyFraction,
 755                     oldCurrencyNumericCode, newCurrencyNumericCode);
 756             list.add(sc);
 757         }
 758         return list;
 759     }
 760 
 761     private static List<OtherCurrencyEntry> readOtherCurrencies(DataInputStream dis,
 762             int count)
 763             throws IOException {
 764 
 765         List<OtherCurrencyEntry> list = new ArrayList<>(count);
 766         String currencyCode;
 767         int fraction;
 768         int numericCode;
 769 
 770         for (int i = 0; i < count; i++) {
 771             currencyCode = dis.readUTF();
 772             fraction = dis.readInt();
 773             numericCode = dis.readInt();
 774             OtherCurrencyEntry oc = new OtherCurrencyEntry(currencyCode,
 775                     fraction,
 776                     numericCode);
 777             list.add(oc);
 778         }
 779         return list;
 780     }
 781 
 782     /**
 783      * Parse currency data found in the properties file (that
 784      * java.util.currency.data designates) to a List of CurrencyProperty
 785      * instances. Also, remove invalid entries and the multiple currency
 786      * code inconsistencies.
 787      *
 788      * @param props properties containing currency data
 789      * @param pattern regex pattern for the properties entry
 790      * @return list of parsed property entries
 791      */
 792     private static List<CurrencyProperty> getValidCurrencyData(Properties props,
 793             Pattern pattern) {
 794 
 795         Set<String> keys = props.stringPropertyNames();
 796         List<CurrencyProperty> propertyEntries = new ArrayList<>();
 797 
 798         // remove all invalid entries and parse all valid currency properties
 799         // entries to a group of CurrencyProperty, classified by currency code
 800         Map<String, List<CurrencyProperty>> currencyCodeGroup = keys.stream()
 801                 .map(k -> CurrencyProperty
 802                 .getValidEntry(k.toUpperCase(Locale.ROOT),
 803                         props.getProperty(k).toUpperCase(Locale.ROOT),
 804                         pattern)).flatMap(o -> o.stream())
 805                 .collect(Collectors.groupingBy(entry -> entry.currencyCode));
 806 
 807         // check each group for inconsistencies
 808         currencyCodeGroup.forEach((curCode, list) -> {
 809             boolean inconsistent = CurrencyProperty
 810                     .containsInconsistentInstances(list);
 811             if (inconsistent) {
 812                 list.forEach(prop -> CurrencyProperty.info("The property"
 813                         + " entry for " + prop.country + " is inconsistent."
 814                         + " Ignored.", null));
 815             } else {
 816                 propertyEntries.addAll(list);
 817             }
 818         });
 819 
 820         return propertyEntries;
 821     }
 822 
 823     /**
 824      * Replaces currency data found in the properties file that
 825      * java.util.currency.data designates. This method is invoked for
 826      * each valid currency entry.
 827      *
 828      * @param prop CurrencyProperty instance of the valid property entry
 829      */
 830     private static void replaceCurrencyData(CurrencyProperty prop) {
 831 
 832 
 833         String ctry = prop.country;
 834         String code = prop.currencyCode;
 835         int numeric = prop.numericCode;
 836         int fraction = prop.fraction;
 837         int entry = numeric << NUMERIC_CODE_SHIFT;
 838 
 839         int index = SpecialCaseEntry.indexOf(code, fraction, numeric);
 840 
 841 
 842         // If a new entry changes the numeric code/dfd of an existing
 843         // currency code, update it in the sc list at the respective
 844         // index and also change it in the other currencies list and
 845         // main table (if that currency code is also used as a
 846         // simple case).
 847 
 848         // If all three components do not match with the new entry,
 849         // but the currency code exists in the special case list
 850         // update the sc entry with the new entry
 851         int scCurrencyCodeIndex = -1;
 852         if (index == -1) {
 853             scCurrencyCodeIndex = SpecialCaseEntry.currencyCodeIndex(code);
 854             if (scCurrencyCodeIndex != -1) {
 855                 //currency code exists in sc list, then update the old entry
 856                 specialCasesList.set(scCurrencyCodeIndex,
 857                         new SpecialCaseEntry(code, fraction, numeric));
 858 
 859                 // also update the entry in other currencies list
 860                 OtherCurrencyEntry oe = OtherCurrencyEntry.findEntry(code);
 861                 if (oe != null) {
 862                     int oIndex = otherCurrenciesList.indexOf(oe);
 863                     otherCurrenciesList.set(oIndex, new OtherCurrencyEntry(
 864                             code, fraction, numeric));
 865                 }
 866             }
 867         }
 868 
 869         /* If a country switches from simple case to special case or
 870          * one special case to other special case which is not present
 871          * in the sc arrays then insert the new entry in special case arrays.
 872          * If an entry with given currency code exists, update with the new
 873          * entry.
 874          */
 875         if (index == -1 && (ctry.charAt(0) != code.charAt(0)
 876                 || ctry.charAt(1) != code.charAt(1))) {
 877 
 878             if(scCurrencyCodeIndex == -1) {
 879                 specialCasesList.add(new SpecialCaseEntry(code, fraction,
 880                         numeric));
 881                 index = specialCasesList.size() - 1;
 882             } else {
 883                 index = scCurrencyCodeIndex;
 884             }
 885 
 886             // update the entry in main table if it exists as a simple case
 887             updateMainTableEntry(code, fraction, numeric);
 888         }
 889 
 890         if (index == -1) {
 891             // simple case
 892             entry |= (fraction << SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT)
 893                     | (code.charAt(2) - 'A');
 894         } else {
 895             // special case
 896             entry = SPECIAL_CASE_COUNTRY_MASK
 897                     | (index + SPECIAL_CASE_COUNTRY_INDEX_DELTA);
 898         }
 899         setMainTableEntry(ctry.charAt(0), ctry.charAt(1), entry);
 900     }
 901 
 902     // update the entry in maintable for any simple case found, if a new
 903     // entry as a special case updates the entry in sc list with
 904     // existing currency code
 905     private static void updateMainTableEntry(String code, int fraction,
 906             int numeric) {
 907         // checking the existence of currency code in mainTable
 908         int tableEntry = getMainTableEntry(code.charAt(0), code.charAt(1));
 909         int entry = numeric << NUMERIC_CODE_SHIFT;
 910         if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
 911                 && tableEntry != INVALID_COUNTRY_ENTRY
 912                 && code.charAt(2) - 'A' == (tableEntry
 913                 & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK)) {
 914 
 915             int numericCode = (tableEntry & NUMERIC_CODE_MASK)
 916                     >> NUMERIC_CODE_SHIFT;
 917             int defaultFractionDigits = (tableEntry
 918                     & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK)
 919                     >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
 920             if (numeric != numericCode || fraction != defaultFractionDigits) {
 921                 // update the entry in main table
 922                 entry |= (fraction << SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT)
 923                         | (code.charAt(2) - 'A');
 924                 setMainTableEntry(code.charAt(0), code.charAt(1), entry);
 925             }
 926         }
 927     }
 928 
 929     /* Used to represent a special case currency entry
 930      * - cutOverTime: cut-over time in millis as returned by
 931      *   System.currentTimeMillis for special case countries that are changing
 932      *   currencies; Long.MAX_VALUE for countries that are not changing currencies
 933      * - oldCurrency: old currencies for special case countries
 934      * - newCurrency: new currencies for special case countries that are
 935      *   changing currencies; null for others
 936      * - oldCurrencyFraction: default fraction digits for old currencies
 937      * - newCurrencyFraction: default fraction digits for new currencies, 0 for
 938      *   countries that are not changing currencies
 939      * - oldCurrencyNumericCode: numeric code for old currencies
 940      * - newCurrencyNumericCode: numeric code for new currencies, 0 for countries
 941      *   that are not changing currencies
 942     */
 943     private static class SpecialCaseEntry {
 944 
 945         final private long cutOverTime;
 946         final private String oldCurrency;
 947         final private String newCurrency;
 948         final private int oldCurrencyFraction;
 949         final private int newCurrencyFraction;
 950         final private int oldCurrencyNumericCode;
 951         final private int newCurrencyNumericCode;
 952 
 953         private SpecialCaseEntry(long cutOverTime, String oldCurrency, String newCurrency,
 954                 int oldCurrencyFraction, int newCurrencyFraction,
 955                 int oldCurrencyNumericCode, int newCurrencyNumericCode) {
 956             this.cutOverTime = cutOverTime;
 957             this.oldCurrency = oldCurrency;
 958             this.newCurrency = newCurrency;
 959             this.oldCurrencyFraction = oldCurrencyFraction;
 960             this.newCurrencyFraction = newCurrencyFraction;
 961             this.oldCurrencyNumericCode = oldCurrencyNumericCode;
 962             this.newCurrencyNumericCode = newCurrencyNumericCode;
 963         }
 964 
 965         private SpecialCaseEntry(String currencyCode, int fraction,
 966                 int numericCode) {
 967             this(Long.MAX_VALUE, currencyCode, "", fraction, 0, numericCode, 0);
 968         }
 969 
 970         //get the index of the special case entry
 971         private static int indexOf(String code, int fraction, int numeric) {
 972             int size = specialCasesList.size();
 973             for (int index = 0; index < size; index++) {
 974                 SpecialCaseEntry scEntry = specialCasesList.get(index);
 975                 if (scEntry.oldCurrency.equals(code)
 976                         && scEntry.oldCurrencyFraction == fraction
 977                         && scEntry.oldCurrencyNumericCode == numeric
 978                         && scEntry.cutOverTime == Long.MAX_VALUE) {
 979                     return index;
 980                 }
 981             }
 982             return -1;
 983         }
 984 
 985         // get the fraction and numericCode of the sc currencycode
 986         private static int[] findEntry(String code) {
 987             int[] fractionAndNumericCode = null;
 988             int size = specialCasesList.size();
 989             for (int index = 0; index < size; index++) {
 990                 SpecialCaseEntry scEntry = specialCasesList.get(index);
 991                 if (scEntry.oldCurrency.equals(code) && (scEntry.cutOverTime == Long.MAX_VALUE
 992                         || System.currentTimeMillis() < scEntry.cutOverTime)) {
 993                     //consider only when there is no new currency or cutover time is not passed
 994                     fractionAndNumericCode = new int[2];
 995                     fractionAndNumericCode[0] = scEntry.oldCurrencyFraction;
 996                     fractionAndNumericCode[1] = scEntry.oldCurrencyNumericCode;
 997                     break;
 998                 } else if (scEntry.newCurrency.equals(code)
 999                         && System.currentTimeMillis() >= scEntry.cutOverTime) {
1000                     //consider only if the cutover time is passed
1001                     fractionAndNumericCode = new int[2];
1002                     fractionAndNumericCode[0] = scEntry.newCurrencyFraction;
1003                     fractionAndNumericCode[1] = scEntry.newCurrencyNumericCode;
1004                     break;
1005                 }
1006             }
1007             return fractionAndNumericCode;
1008         }
1009 
1010         // get the index based on currency code
1011         private static int currencyCodeIndex(String code) {
1012             int size = specialCasesList.size();
1013             for (int index = 0; index < size; index++) {
1014                 SpecialCaseEntry scEntry = specialCasesList.get(index);
1015                 if (scEntry.oldCurrency.equals(code) && (scEntry.cutOverTime == Long.MAX_VALUE
1016                         || System.currentTimeMillis() < scEntry.cutOverTime)) {
1017                     //consider only when there is no new currency or cutover time is not passed
1018                     return index;
1019                 } else if (scEntry.newCurrency.equals(code)
1020                         && System.currentTimeMillis() >= scEntry.cutOverTime) {
1021                     //consider only if the cutover time is passed
1022                     return index;
1023                 }
1024             }
1025             return -1;
1026         }
1027 
1028 
1029         // convert the special case entry to sc arrays index
1030         private static int toIndex(int tableEntry) {
1031             return (tableEntry & SPECIAL_CASE_COUNTRY_INDEX_MASK) - SPECIAL_CASE_COUNTRY_INDEX_DELTA;
1032         }
1033 
1034     }
1035 
1036     /* Used to represent Other currencies
1037      * - currencyCode: currency codes that are not the main currency
1038      *   of a simple country
1039      * - otherCurrenciesDFD: decimal format digits for other currencies
1040      * - otherCurrenciesNumericCode: numeric code for other currencies
1041      */
1042     private static class OtherCurrencyEntry {
1043 
1044         final private String currencyCode;
1045         final private int fraction;
1046         final private int numericCode;
1047 
1048         private OtherCurrencyEntry(String currencyCode, int fraction,
1049                 int numericCode) {
1050             this.currencyCode = currencyCode;
1051             this.fraction = fraction;
1052             this.numericCode = numericCode;
1053         }
1054 
1055         //get the instance of the other currency code
1056         private static OtherCurrencyEntry findEntry(String code) {
1057             int size = otherCurrenciesList.size();
1058             for (int index = 0; index < size; index++) {
1059                 OtherCurrencyEntry ocEntry = otherCurrenciesList.get(index);
1060                 if (ocEntry.currencyCode.equalsIgnoreCase(code)) {
1061                     return ocEntry;
1062                 }
1063             }
1064             return null;
1065         }
1066 
1067     }
1068 
1069 
1070     /*
1071      * Used to represent an entry of the properties file that
1072      * java.util.currency.data designates
1073      *
1074      * - country: country representing the currency entry
1075      * - currencyCode: currency code
1076      * - fraction: default fraction digit
1077      * - numericCode: numeric code
1078      * - date: cutover date
1079      */
1080     private static class CurrencyProperty {
1081         final private String country;
1082         final private String currencyCode;
1083         final private int fraction;
1084         final private int numericCode;
1085         final private String date;
1086 
1087         private CurrencyProperty(String country, String currencyCode,
1088                 int fraction, int numericCode, String date) {
1089             this.country = country;
1090             this.currencyCode = currencyCode;
1091             this.fraction = fraction;
1092             this.numericCode = numericCode;
1093             this.date = date;
1094         }
1095 
1096         /**
1097          * Check the valid currency data and create/return an Optional instance
1098          * of CurrencyProperty
1099          *
1100          * @param ctry    country representing the currency data
1101          * @param curData currency data of the given {@code ctry}
1102          * @param pattern regex pattern for the properties entry
1103          * @return Optional containing CurrencyProperty instance, If valid;
1104          *         empty otherwise
1105          */
1106         private static Optional<CurrencyProperty> getValidEntry(String ctry,
1107                 String curData,
1108                 Pattern pattern) {
1109 
1110             CurrencyProperty prop = null;
1111 
1112             if (ctry.length() != 2) {
1113                 // Invalid country code. Ignore the entry.
1114             } else {
1115 
1116                 prop = parseProperty(ctry, curData, pattern);
1117                 // if the property entry failed any of the below checked
1118                 // criteria it is ignored
1119                 if (prop == null
1120                         || (prop.date == null && curData.chars()
1121                                 .map(c -> c == ',' ? 1 : 0).sum() >= 3)) {
1122                     // format is not recognized.  ignore the data if date
1123                     // string is null and we've 4 values, bad date value
1124                     prop = null;
1125                 } else if (prop.fraction
1126                         > SIMPLE_CASE_COUNTRY_MAX_DEFAULT_DIGITS) {
1127                     prop = null;
1128                 } else {
1129                     try {
1130                         if (prop.date != null
1131                                 && !isPastCutoverDate(prop.date)) {
1132                             prop = null;
1133                         }
1134                     } catch (ParseException ex) {
1135                         prop = null;
1136                     }
1137                 }
1138             }
1139 
1140             if (prop == null) {
1141                 info("The property entry for " + ctry + " is invalid."
1142                         + " Ignored.", null);
1143             }
1144 
1145             return Optional.ofNullable(prop);
1146         }
1147 
1148         /*
1149          * Parse properties entry and return CurrencyProperty instance
1150          */
1151         private static CurrencyProperty parseProperty(String ctry,
1152                 String curData, Pattern pattern) {
1153             Matcher m = pattern.matcher(curData);
1154             if (!m.find()) {
1155                 return null;
1156             } else {
1157                 return new CurrencyProperty(ctry, m.group(1),
1158                         Integer.parseInt(m.group(3)),
1159                         Integer.parseInt(m.group(2)), m.group(4));
1160             }
1161         }
1162 
1163         /**
1164          * Checks if the given list contains multiple inconsistent currency instances
1165          */
1166         private static boolean containsInconsistentInstances(
1167                 List<CurrencyProperty> list) {
1168             int numCode = list.get(0).numericCode;
1169             int fractionDigit = list.get(0).fraction;
1170             return list.stream().anyMatch(prop -> prop.numericCode != numCode
1171                     || prop.fraction != fractionDigit);
1172         }
1173 
1174         private static boolean isPastCutoverDate(String s)
1175                 throws ParseException {
1176             SimpleDateFormat format = new SimpleDateFormat(
1177                     "yyyy-MM-dd'T'HH:mm:ss", Locale.ROOT);
1178             format.setTimeZone(TimeZone.getTimeZone("UTC"));
1179             format.setLenient(false);
1180             long time = format.parse(s.trim()).getTime();
1181             return System.currentTimeMillis() > time;
1182 
1183         }
1184 
1185         private static void info(String message, Throwable t) {
1186             PlatformLogger logger = PlatformLogger
1187                     .getLogger("java.util.Currency");
1188             if (logger.isLoggable(PlatformLogger.Level.INFO)) {
1189                 if (t != null) {
1190                     logger.info(message, t);
1191                 } else {
1192                     logger.info(message);
1193                 }
1194             }
1195         }
1196 
1197     }
1198 
1199 }
1200 
1201