001: /*
002: * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved.
003: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004: *
005: * This code is free software; you can redistribute it and/or modify it
006: * under the terms of the GNU General Public License version 2 only, as
007: * published by the Free Software Foundation. Sun designates this
008: * particular file as subject to the "Classpath" exception as provided
009: * by Sun in the LICENSE file that accompanied this code.
010: *
011: * This code is distributed in the hope that it will be useful, but WITHOUT
012: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014: * version 2 for more details (a copy is included in the LICENSE file that
015: * accompanied this code).
016: *
017: * You should have received a copy of the GNU General Public License version
018: * 2 along with this work; if not, write to the Free Software Foundation,
019: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020: *
021: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022: * CA 95054 USA or visit www.sun.com if you need additional information or
023: * have any questions.
024: */
025:
026: package java.util;
027:
028: import java.io.BufferedInputStream;
029: import java.io.DataInputStream;
030: import java.io.File;
031: import java.io.FileInputStream;
032: import java.io.FileReader;
033: import java.io.IOException;
034: import java.io.Serializable;
035: import java.security.AccessController;
036: import java.security.PrivilegedAction;
037: import java.util.logging.Level;
038: import java.util.logging.Logger;
039: import java.util.regex.Pattern;
040: import java.util.regex.Matcher;
041: import java.util.spi.CurrencyNameProvider;
042: import java.util.spi.LocaleServiceProvider;
043: import sun.util.LocaleServiceProviderPool;
044: import sun.util.resources.LocaleData;
045: import sun.util.resources.OpenListResourceBundle;
046:
047: /**
048: * Represents a currency. Currencies are identified by their ISO 4217 currency
049: * codes. Visit the <a href="http://www.bsi-global.com/">
050: * BSi web site</a> for more information, including a table of
051: * currency codes.
052: * <p>
053: * The class is designed so that there's never more than one
054: * <code>Currency</code> instance for any given currency. Therefore, there's
055: * no public constructor. You obtain a <code>Currency</code> instance using
056: * the <code>getInstance</code> methods.
057: * <p>
058: * Users can supersede the Java runtime currency data by creating a properties
059: * file named <code><JAVA_HOME>/lib/currency.properties</code>. The contents
060: * of the properties file are key/value pairs of the ISO 3166 country codes
061: * and the ISO 4217 currency data respectively. The value part consists of
062: * three ISO 4217 values of a currency, i.e., an alphabetic code, a numeric
063: * code, and a minor unit. Those three ISO 4217 values are separated by commas.
064: * The lines which start with '#'s are considered comment lines. For example,
065: * <p>
066: * <code>
067: * #Sample currency properties<br>
068: * JP=JPZ,999,0
069: * </code>
070: * <p>
071: * will supersede the currency data for Japan.
072: *
073: * @since 1.4
074: */
075: public final class Currency implements Serializable {
076:
077: private static final long serialVersionUID = -158308464356906721L;
078:
079: /**
080: * ISO 4217 currency code for this currency.
081: *
082: * @serial
083: */
084: private final String currencyCode;
085:
086: /**
087: * Default fraction digits for this currency.
088: * Set from currency data tables.
089: */
090: transient private final int defaultFractionDigits;
091:
092: /**
093: * ISO 4217 numeric code for this currency.
094: * Set from currency data tables.
095: */
096: transient private final int numericCode;
097:
098: // class data: instance map
099:
100: private static HashMap<String, Currency> instances = new HashMap<String, Currency>(
101: 7);
102: private static HashSet<Currency> available;
103:
104: // Class data: currency data obtained from currency.data file.
105: // Purpose:
106: // - determine valid country codes
107: // - determine valid currency codes
108: // - map country codes to currency codes
109: // - obtain default fraction digits for currency codes
110: //
111: // sc = special case; dfd = default fraction digits
112: // Simple countries are those where the country code is a prefix of the
113: // currency code, and there are no known plans to change the currency.
114: //
115: // table formats:
116: // - mainTable:
117: // - maps country code to 32-bit int
118: // - 26*26 entries, corresponding to [A-Z]*[A-Z]
119: // - \u007F -> not valid country
120: // - bits 18-31: unused
121: // - bits 8-17: numeric code (0 to 1023)
122: // - bit 7: 1 - special case, bits 0-4 indicate which one
123: // 0 - simple country, bits 0-4 indicate final char of currency code
124: // - bits 5-6: fraction digits for simple countries, 0 for special cases
125: // - bits 0-4: final char for currency code for simple country, or ID of special case
126: // - special case IDs:
127: // - 0: country has no currency
128: // - other: index into sc* arrays + 1
129: // - scCutOverTimes: cut-over time in millis as returned by
130: // System.currentTimeMillis for special case countries that are changing
131: // currencies; Long.MAX_VALUE for countries that are not changing currencies
132: // - scOldCurrencies: old currencies for special case countries
133: // - scNewCurrencies: new currencies for special case countries that are
134: // changing currencies; null for others
135: // - scOldCurrenciesDFD: default fraction digits for old currencies
136: // - scNewCurrenciesDFD: default fraction digits for new currencies, 0 for
137: // countries that are not changing currencies
138: // - otherCurrencies: concatenation of all currency codes that are not the
139: // main currency of a simple country, separated by "-"
140: // - otherCurrenciesDFD: decimal format digits for currencies in otherCurrencies, same order
141:
142: static int formatVersion;
143: static int dataVersion;
144: static int[] mainTable;
145: static long[] scCutOverTimes;
146: static String[] scOldCurrencies;
147: static String[] scNewCurrencies;
148: static int[] scOldCurrenciesDFD;
149: static int[] scNewCurrenciesDFD;
150: static int[] scOldCurrenciesNumericCode;
151: static int[] scNewCurrenciesNumericCode;
152: static String otherCurrencies;
153: static int[] otherCurrenciesDFD;
154: static int[] otherCurrenciesNumericCode;
155:
156: // handy constants - must match definitions in GenerateCurrencyData
157: // magic number
158: private static final int MAGIC_NUMBER = 0x43757244;
159: // number of characters from A to Z
160: private static final int A_TO_Z = ('Z' - 'A') + 1;
161: // entry for invalid country codes
162: private static final int INVALID_COUNTRY_ENTRY = 0x007F;
163: // entry for countries without currency
164: private static final int COUNTRY_WITHOUT_CURRENCY_ENTRY = 0x0080;
165: // mask for simple case country entries
166: private static final int SIMPLE_CASE_COUNTRY_MASK = 0x0000;
167: // mask for simple case country entry final character
168: private static final int SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK = 0x001F;
169: // mask for simple case country entry default currency digits
170: private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK = 0x0060;
171: // shift count for simple case country entry default currency digits
172: private static final int SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT = 5;
173: // mask for special case country entries
174: private static final int SPECIAL_CASE_COUNTRY_MASK = 0x0080;
175: // mask for special case country index
176: private static final int SPECIAL_CASE_COUNTRY_INDEX_MASK = 0x001F;
177: // delta from entry index component in main table to index into special case tables
178: private static final int SPECIAL_CASE_COUNTRY_INDEX_DELTA = 1;
179: // mask for distinguishing simple and special case countries
180: private static final int COUNTRY_TYPE_MASK = SIMPLE_CASE_COUNTRY_MASK
181: | SPECIAL_CASE_COUNTRY_MASK;
182: // mask for the numeric code of the currency
183: private static final int NUMERIC_CODE_MASK = 0x0003FF00;
184: // shift count for the numeric code of the currency
185: private static final int NUMERIC_CODE_SHIFT = 8;
186:
187: // Currency data format version
188: private static final int VALID_FORMAT_VERSION = 1;
189:
190: static {
191: AccessController.doPrivileged(new PrivilegedAction() {
192: public Object run() {
193: String homeDir = System.getProperty("java.home");
194: try {
195: String dataFile = homeDir + File.separator + "lib"
196: + File.separator + "currency.data";
197: DataInputStream dis = new DataInputStream(
198: new BufferedInputStream(
199: new FileInputStream(dataFile)));
200: if (dis.readInt() != MAGIC_NUMBER) {
201: throw new InternalError(
202: "Currency data is possibly corrupted");
203: }
204: formatVersion = dis.readInt();
205: if (formatVersion != VALID_FORMAT_VERSION) {
206: throw new InternalError(
207: "Currency data format is incorrect");
208: }
209: dataVersion = dis.readInt();
210: mainTable = readIntArray(dis, A_TO_Z * A_TO_Z);
211: int scCount = dis.readInt();
212: scCutOverTimes = readLongArray(dis, scCount);
213: scOldCurrencies = readStringArray(dis, scCount);
214: scNewCurrencies = readStringArray(dis, scCount);
215: scOldCurrenciesDFD = readIntArray(dis, scCount);
216: scNewCurrenciesDFD = readIntArray(dis, scCount);
217: scOldCurrenciesNumericCode = readIntArray(dis,
218: scCount);
219: scNewCurrenciesNumericCode = readIntArray(dis,
220: scCount);
221: int ocCount = dis.readInt();
222: otherCurrencies = dis.readUTF();
223: otherCurrenciesDFD = readIntArray(dis, ocCount);
224: otherCurrenciesNumericCode = readIntArray(dis,
225: ocCount);
226: dis.close();
227: } catch (IOException e) {
228: InternalError ie = new InternalError();
229: ie.initCause(e);
230: throw ie;
231: }
232:
233: // look for the properties file for overrides
234: try {
235: File propFile = new File(homeDir + File.separator
236: + "lib" + File.separator
237: + "currency.properties");
238: if (propFile.exists()) {
239: Properties props = new Properties();
240: props.load(new FileReader(propFile));
241: Set<String> keys = props.stringPropertyNames();
242: Pattern propertiesPattern = Pattern
243: .compile("([A-Z]{3})\\s*,\\s*(\\d{3})\\s*,\\s*([0-3])");
244: for (String key : keys) {
245: replaceCurrencyData(propertiesPattern, key
246: .toUpperCase(Locale.ROOT), props
247: .getProperty(key).toUpperCase(
248: Locale.ROOT));
249: }
250: }
251: } catch (IOException e) {
252: log(
253: Level.INFO,
254: "currency.properties is ignored because of an IOException",
255: e);
256: }
257: return null;
258: }
259: });
260: }
261:
262: /**
263: * Constants for retrieving localized names from the name providers.
264: */
265: private static final int SYMBOL = 0;
266: private static final int DISPLAYNAME = 1;
267:
268: /**
269: * Constructs a <code>Currency</code> instance. The constructor is private
270: * so that we can insure that there's never more than one instance for a
271: * given currency.
272: */
273: private Currency(String currencyCode, int defaultFractionDigits,
274: int numericCode) {
275: this .currencyCode = currencyCode;
276: this .defaultFractionDigits = defaultFractionDigits;
277: this .numericCode = numericCode;
278: }
279:
280: /**
281: * Returns the <code>Currency</code> instance for the given currency code.
282: *
283: * @param currencyCode the ISO 4217 code of the currency
284: * @return the <code>Currency</code> instance for the given currency code
285: * @exception NullPointerException if <code>currencyCode</code> is null
286: * @exception IllegalArgumentException if <code>currencyCode</code> is not
287: * a supported ISO 4217 code.
288: */
289: public static Currency getInstance(String currencyCode) {
290: return getInstance(currencyCode, Integer.MIN_VALUE, 0);
291: }
292:
293: private static Currency getInstance(String currencyCode,
294: int defaultFractionDigits, int numericCode) {
295: synchronized (instances) {
296: // Try to look up the currency code in the instances table.
297: // This does the null pointer check as a side effect.
298: // Also, if there already is an entry, the currencyCode must be valid.
299: Currency instance = instances.get(currencyCode);
300: if (instance != null) {
301: return instance;
302: }
303:
304: if (defaultFractionDigits == Integer.MIN_VALUE) {
305: // Currency code not internally generated, need to verify first
306: // A currency code must have 3 characters and exist in the main table
307: // or in the list of other currencies.
308: if (currencyCode.length() != 3) {
309: throw new IllegalArgumentException();
310: }
311: char char1 = currencyCode.charAt(0);
312: char char2 = currencyCode.charAt(1);
313: int tableEntry = getMainTableEntry(char1, char2);
314: if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
315: && tableEntry != INVALID_COUNTRY_ENTRY
316: && currencyCode.charAt(2) - 'A' == (tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK)) {
317: defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
318: numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
319: } else {
320: // Check for '-' separately so we don't get false hits in the table.
321: if (currencyCode.charAt(2) == '-') {
322: throw new IllegalArgumentException();
323: }
324: int index = otherCurrencies.indexOf(currencyCode);
325: if (index == -1) {
326: throw new IllegalArgumentException();
327: }
328: defaultFractionDigits = otherCurrenciesDFD[index / 4];
329: numericCode = otherCurrenciesNumericCode[index / 4];
330: }
331: }
332:
333: instance = new Currency(currencyCode,
334: defaultFractionDigits, numericCode);
335: instances.put(currencyCode, instance);
336: return instance;
337: }
338: }
339:
340: /**
341: * Returns the <code>Currency</code> instance for the country of the
342: * given locale. The language and variant components of the locale
343: * are ignored. The result may vary over time, as countries change their
344: * currencies. For example, for the original member countries of the
345: * European Monetary Union, the method returns the old national currencies
346: * until December 31, 2001, and the Euro from January 1, 2002, local time
347: * of the respective countries.
348: * <p>
349: * The method returns <code>null</code> for territories that don't
350: * have a currency, such as Antarctica.
351: *
352: * @param locale the locale for whose country a <code>Currency</code>
353: * instance is needed
354: * @return the <code>Currency</code> instance for the country of the given
355: * locale, or null
356: * @exception NullPointerException if <code>locale</code> or its country
357: * code is null
358: * @exception IllegalArgumentException if the country of the given locale
359: * is not a supported ISO 3166 country code.
360: */
361: public static Currency getInstance(Locale locale) {
362: String country = locale.getCountry();
363: if (country == null) {
364: throw new NullPointerException();
365: }
366:
367: if (country.length() != 2) {
368: throw new IllegalArgumentException();
369: }
370:
371: char char1 = country.charAt(0);
372: char char2 = country.charAt(1);
373: int tableEntry = getMainTableEntry(char1, char2);
374: if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
375: && tableEntry != INVALID_COUNTRY_ENTRY) {
376: char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
377: int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
378: int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
379: StringBuffer sb = new StringBuffer(country);
380: sb.append(finalChar);
381: return getInstance(sb.toString(), defaultFractionDigits,
382: numericCode);
383: } else {
384: // special cases
385: if (tableEntry == INVALID_COUNTRY_ENTRY) {
386: throw new IllegalArgumentException();
387: }
388: if (tableEntry == COUNTRY_WITHOUT_CURRENCY_ENTRY) {
389: return null;
390: } else {
391: int index = (tableEntry & SPECIAL_CASE_COUNTRY_INDEX_MASK)
392: - SPECIAL_CASE_COUNTRY_INDEX_DELTA;
393: if (scCutOverTimes[index] == Long.MAX_VALUE
394: || System.currentTimeMillis() < scCutOverTimes[index]) {
395: return getInstance(scOldCurrencies[index],
396: scOldCurrenciesDFD[index],
397: scOldCurrenciesNumericCode[index]);
398: } else {
399: return getInstance(scNewCurrencies[index],
400: scNewCurrenciesDFD[index],
401: scNewCurrenciesNumericCode[index]);
402: }
403: }
404: }
405: }
406:
407: /**
408: * Gets the set of available currencies. The returned set of currencies
409: * contains all of the available currencies, which may include currencies
410: * that represent obsolete ISO 4217 codes. The set can be modified
411: * without affecting the available currencies in the runtime.
412: *
413: * @return the set of available currencies. If there is no currency
414: * available in the runtime, the returned set is empty.
415: * @since 1.7
416: */
417: public static Set<Currency> getAvailableCurrencies() {
418: synchronized (Currency.class) {
419: if (available == null) {
420: available = new HashSet<Currency>(256);
421:
422: // Add simple currencies first
423: for (char c1 = 'A'; c1 <= 'Z'; c1++) {
424: for (char c2 = 'A'; c2 <= 'Z'; c2++) {
425: int tableEntry = getMainTableEntry(c1, c2);
426: if ((tableEntry & COUNTRY_TYPE_MASK) == SIMPLE_CASE_COUNTRY_MASK
427: && tableEntry != INVALID_COUNTRY_ENTRY) {
428: char finalChar = (char) ((tableEntry & SIMPLE_CASE_COUNTRY_FINAL_CHAR_MASK) + 'A');
429: int defaultFractionDigits = (tableEntry & SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_MASK) >> SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT;
430: int numericCode = (tableEntry & NUMERIC_CODE_MASK) >> NUMERIC_CODE_SHIFT;
431: StringBuilder sb = new StringBuilder();
432: sb.append(c1);
433: sb.append(c2);
434: sb.append(finalChar);
435: available
436: .add(getInstance(sb.toString(),
437: defaultFractionDigits,
438: numericCode));
439: }
440: }
441: }
442:
443: // Now add other currencies
444: StringTokenizer st = new StringTokenizer(
445: otherCurrencies, "-");
446: while (st.hasMoreElements()) {
447: available
448: .add(getInstance((String) st.nextElement()));
449: }
450: }
451: }
452:
453: return (Set<Currency>) available.clone();
454: }
455:
456: /**
457: * Gets the ISO 4217 currency code of this currency.
458: *
459: * @return the ISO 4217 currency code of this currency.
460: */
461: public String getCurrencyCode() {
462: return currencyCode;
463: }
464:
465: /**
466: * Gets the symbol of this currency for the default locale.
467: * For example, for the US Dollar, the symbol is "$" if the default
468: * locale is the US, while for other locales it may be "US$". If no
469: * symbol can be determined, the ISO 4217 currency code is returned.
470: *
471: * @return the symbol of this currency for the default locale
472: */
473: public String getSymbol() {
474: return getSymbol(Locale.getDefault());
475: }
476:
477: /**
478: * Gets the symbol of this currency for the specified locale.
479: * For example, for the US Dollar, the symbol is "$" if the specified
480: * locale is the US, while for other locales it may be "US$". If no
481: * symbol can be determined, the ISO 4217 currency code is returned.
482: *
483: * @param locale the locale for which a display name for this currency is
484: * needed
485: * @return the symbol of this currency for the specified locale
486: * @exception NullPointerException if <code>locale</code> is null
487: */
488: public String getSymbol(Locale locale) {
489: try {
490: // Check whether a provider can provide an implementation that's closer
491: // to the requested locale than what the Java runtime itself can provide.
492: LocaleServiceProviderPool pool = LocaleServiceProviderPool
493: .getPool(CurrencyNameProvider.class);
494:
495: if (pool.hasProviders()) {
496: // Assuming that all the country locales include necessary currency
497: // symbols in the Java runtime's resources, so there is no need to
498: // examine whether Java runtime's currency resource bundle is missing
499: // names. Therefore, no resource bundle is provided for calling this
500: // method.
501: String symbol = pool.getLocalizedObject(
502: CurrencyNameGetter.INSTANCE, locale,
503: (OpenListResourceBundle) null, currencyCode,
504: SYMBOL);
505: if (symbol != null) {
506: return symbol;
507: }
508: }
509:
510: ResourceBundle bundle = LocaleData.getCurrencyNames(locale);
511: return bundle.getString(currencyCode);
512: } catch (MissingResourceException e) {
513: // use currency code as symbol of last resort
514: return currencyCode;
515: }
516: }
517:
518: /**
519: * Gets the default number of fraction digits used with this currency.
520: * For example, the default number of fraction digits for the Euro is 2,
521: * while for the Japanese Yen it's 0.
522: * In the case of pseudo-currencies, such as IMF Special Drawing Rights,
523: * -1 is returned.
524: *
525: * @return the default number of fraction digits used with this currency
526: */
527: public int getDefaultFractionDigits() {
528: return defaultFractionDigits;
529: }
530:
531: /**
532: * Returns the ISO 4217 numeric code of this currency.
533: *
534: * @return the ISO 4217 numeric code of this currency
535: * @since 1.7
536: */
537: public int getNumericCode() {
538: return numericCode;
539: }
540:
541: /**
542: * Gets the name that is suitable for displaying this currency for
543: * the default locale. If there is no suitable display name found
544: * for the default locale, the ISO 4217 currency code is returned.
545: *
546: * @return the display name of this currency for the default locale
547: * @since 1.7
548: */
549: public String getDisplayName() {
550: return getDisplayName(Locale.getDefault());
551: }
552:
553: /**
554: * Gets the name that is suitable for displaying this currency for
555: * the specified locale. If there is no suitable display name found
556: * for the specified locale, the ISO 4217 currency code is returned.
557: *
558: * @param locale the locale for which a display name for this currency is
559: * needed
560: * @return the display name of this currency for the specified locale
561: * @exception NullPointerException if <code>locale</code> is null
562: * @since 1.7
563: */
564: public String getDisplayName(Locale locale) {
565: try {
566: OpenListResourceBundle bundle = LocaleData
567: .getCurrencyNames(locale);
568: String result = null;
569: String bundleKey = currencyCode.toLowerCase(Locale.ROOT);
570:
571: // Check whether a provider can provide an implementation that's closer
572: // to the requested locale than what the Java runtime itself can provide.
573: LocaleServiceProviderPool pool = LocaleServiceProviderPool
574: .getPool(CurrencyNameProvider.class);
575: if (pool.hasProviders()) {
576: result = pool.getLocalizedObject(
577: CurrencyNameGetter.INSTANCE, locale, bundleKey,
578: bundle, currencyCode, DISPLAYNAME);
579: }
580:
581: if (result == null) {
582: result = bundle.getString(bundleKey);
583: }
584:
585: if (result != null) {
586: return result;
587: }
588: } catch (MissingResourceException e) {
589: // fall through
590: }
591:
592: // use currency code as symbol of last resort
593: return currencyCode;
594: }
595:
596: /**
597: * Returns the ISO 4217 currency code of this currency.
598: *
599: * @return the ISO 4217 currency code of this currency
600: */
601: public String toString() {
602: return currencyCode;
603: }
604:
605: /**
606: * Resolves instances being deserialized to a single instance per currency.
607: */
608: private Object readResolve() {
609: return getInstance(currencyCode);
610: }
611:
612: /**
613: * Gets the main table entry for the country whose country code consists
614: * of char1 and char2.
615: */
616: private static int getMainTableEntry(char char1, char char2) {
617: if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
618: throw new IllegalArgumentException();
619: }
620: return mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')];
621: }
622:
623: /**
624: * Sets the main table entry for the country whose country code consists
625: * of char1 and char2.
626: */
627: private static void setMainTableEntry(char char1, char char2,
628: int entry) {
629: if (char1 < 'A' || char1 > 'Z' || char2 < 'A' || char2 > 'Z') {
630: throw new IllegalArgumentException();
631: }
632: mainTable[(char1 - 'A') * A_TO_Z + (char2 - 'A')] = entry;
633: }
634:
635: /**
636: * Obtains a localized currency names from a CurrencyNameProvider
637: * implementation.
638: */
639: private static class CurrencyNameGetter
640: implements
641: LocaleServiceProviderPool.LocalizedObjectGetter<CurrencyNameProvider, String> {
642: private static final CurrencyNameGetter INSTANCE = new CurrencyNameGetter();
643:
644: public String getObject(
645: CurrencyNameProvider currencyNameProvider,
646: Locale locale, String key, Object... params) {
647: assert params.length == 1;
648: int type = (Integer) params[0];
649:
650: switch (type) {
651: case SYMBOL:
652: return currencyNameProvider.getSymbol(key, locale);
653: case DISPLAYNAME:
654: return currencyNameProvider.getDisplayName(key, locale);
655: default:
656: assert false; // shouldn't happen
657: }
658:
659: return null;
660: }
661: }
662:
663: private static int[] readIntArray(DataInputStream dis, int count)
664: throws IOException {
665: int[] ret = new int[count];
666: for (int i = 0; i < count; i++) {
667: ret[i] = dis.readInt();
668: }
669:
670: return ret;
671: }
672:
673: private static long[] readLongArray(DataInputStream dis, int count)
674: throws IOException {
675: long[] ret = new long[count];
676: for (int i = 0; i < count; i++) {
677: ret[i] = dis.readLong();
678: }
679:
680: return ret;
681: }
682:
683: private static String[] readStringArray(DataInputStream dis,
684: int count) throws IOException {
685: String[] ret = new String[count];
686: for (int i = 0; i < count; i++) {
687: ret[i] = dis.readUTF();
688: }
689:
690: return ret;
691: }
692:
693: /**
694: * Replaces currency data found in the currencydata.properties file
695: *
696: * @param pattern regex pattern for the properties
697: * @param ctry country code
698: * @param data currency data. This is a comma separated string that
699: * consists of "three-letter alphabet code", "three-digit numeric code",
700: * and "one-digit (0,1,2, or 3) default fraction digit".
701: * For example, "JPZ,392,0".
702: * @throws
703: */
704: private static void replaceCurrencyData(Pattern pattern,
705: String ctry, String curdata) {
706:
707: if (ctry.length() != 2) {
708: // ignore invalid country code
709: String message = new StringBuilder().append(
710: "The entry in currency.properties for ").append(
711: ctry).append(
712: " is ignored because of the invalid country code.")
713: .toString();
714: log(Level.INFO, message, null);
715: return;
716: }
717:
718: Matcher m = pattern.matcher(curdata);
719: if (!m.find()) {
720: // format is not recognized. ignore the data
721: String message = new StringBuilder()
722: .append("The entry in currency.properties for ")
723: .append(ctry)
724: .append(
725: " is ignored because the value format is not recognized.")
726: .toString();
727: log(Level.INFO, message, null);
728: return;
729: }
730:
731: String code = m.group(1);
732: int numeric = Integer.parseInt(m.group(2));
733: int fraction = Integer.parseInt(m.group(3));
734: int entry = numeric << NUMERIC_CODE_SHIFT;
735:
736: int index;
737: for (index = 0; index < scOldCurrencies.length; index++) {
738: if (scOldCurrencies[index].equals(code)) {
739: break;
740: }
741: }
742:
743: if (index == scOldCurrencies.length) {
744: // simple case
745: entry |= (fraction << SIMPLE_CASE_COUNTRY_DEFAULT_DIGITS_SHIFT)
746: | (code.charAt(2) - 'A');
747: } else {
748: // special case
749: entry |= SPECIAL_CASE_COUNTRY_MASK
750: | (index + SPECIAL_CASE_COUNTRY_INDEX_DELTA);
751: }
752: setMainTableEntry(ctry.charAt(0), ctry.charAt(1), entry);
753: }
754:
755: private static void log(Level level, String message, Throwable t) {
756: Logger logger = Logger.getLogger("java.util.Currency");
757: if (logger.isLoggable(level)) {
758: if (t != null) {
759: logger.log(level, message, t);
760: } else {
761: logger.log(level, message);
762: }
763: }
764: }
765: }
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