src/share/classes/java/time/format/DateTimeTextProvider.java

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  46  *  * Neither the name of JSR-310 nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  54  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  55  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  56  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  57  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  58  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  59  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  60  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  */
  62 package java.time.format;
  63 
  64 import static java.time.temporal.ChronoField.AMPM_OF_DAY;
  65 import static java.time.temporal.ChronoField.DAY_OF_WEEK;

  66 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
  67 
  68 import java.time.temporal.Chrono;
  69 import java.time.temporal.ISOChrono;
  70 import java.time.calendar.JapaneseChrono;
  71 import java.time.calendar.ThaiBuddhistChrono;
  72 import java.time.temporal.TemporalField;
  73 import java.util.AbstractMap.SimpleImmutableEntry;
  74 import java.util.ArrayList;
  75 import java.util.Calendar;
  76 import java.util.Collections;
  77 import java.util.Comparator;
  78 import java.util.HashMap;
  79 import java.util.Iterator;
  80 import java.util.List;
  81 import java.util.Locale;
  82 import java.util.Map;
  83 import java.util.Map.Entry;
  84 import java.util.concurrent.ConcurrentHashMap;
  85 import java.util.concurrent.ConcurrentMap;
  86 import java.util.spi.CalendarNameProvider;
  87 
  88 import sun.util.locale.provider.LocaleProviderAdapter;
  89 import sun.util.locale.provider.CalendarDataUtility;
  90 
  91 /**
  92  * A provider to obtain the textual form of a date-time field.
  93  *
  94  * <h3>Specification for implementors</h3>
  95  * Implementations must be thread-safe.
  96  * Implementations should cache the textual information.
  97  *
  98  * @since 1.8
  99  */
 100 class DateTimeTextProvider {
 101 
 102     /** Cache. */
 103     private static final ConcurrentMap<Entry<TemporalField, Locale>, Object> CACHE = new ConcurrentHashMap<>(16, 0.75f, 2);
 104     /** Comparator. */
 105     private static final Comparator<Entry<String, Long>> COMPARATOR = new Comparator<Entry<String, Long>>() {
 106         @Override
 107         public int compare(Entry<String, Long> obj1, Entry<String, Long> obj2) {
 108             return obj2.getKey().length() - obj1.getKey().length();  // longest to shortest
 109         }
 110     };
 111 
 112     DateTimeTextProvider() {}
 113 
 114     /**
 115      * Gets the provider of text.
 116      *
 117      * @return the provider, not null
 118      */
 119     static DateTimeTextProvider getInstance() {
 120         return new DateTimeTextProvider();
 121     }
 122 
 123     /**
 124      * Gets the text for the specified field, locale and style
 125      * for the purpose of printing.
 126      * <p>
 127      * The text associated with the value is returned.
 128      * The null return value should be used if there is no applicable text, or
 129      * if the text would be a numeric representation of the value.
 130      *
 131      * @param field  the field to get text for, not null
 132      * @param value  the field value to get text for, not null
 133      * @param style  the style to get text for, not null
 134      * @param locale  the locale to get text for, not null
 135      * @return the text for the field value, null if no text found
 136      */
 137     public String getText(TemporalField field, long value, TextStyle style, Locale locale) {
 138         Object store = findStore(field, locale);
 139         if (store instanceof LocaleStore) {
 140             return ((LocaleStore) store).getText(value, style);
 141         }
 142         return null;
 143     }
 144 
 145     private static int toStyle(TextStyle style) {
 146         if (style == TextStyle.FULL) {
 147             return Calendar.LONG_FORMAT;
 148         } else if (style == TextStyle.SHORT) {
 149             return Calendar.SHORT_FORMAT;
 150         }
 151         return Calendar.NARROW_STANDALONE;
 152     }
 153 
 154     /**
 155      * Gets the era text for the specified chrono, value, style and locale
 156      * for the purpose of printing.
 157      * <p>
 158      * The era text associated with the value is returned.
 159      * The null return value should be used if there is no applicable text, or
 160      * if the text would be a numeric representation of the value.
 161      *
 162      * @param chrono the chrono to get text for, not null

 163      * @param value  the field value to get text for, not null
 164      * @param style  the style to get text for, not null
 165      * @param locale  the locale to get text for, not null
 166      * @return the era text for the value, null if no text found
 167      */
 168     public String getEraText(Chrono chrono, long value, TextStyle style, Locale locale) {
 169         String type = null;
 170         if (chrono == ISOChrono.INSTANCE) {
 171             type = "gregory";
 172         } else if (chrono == JapaneseChrono.INSTANCE) {
 173             type = "japanese";






 174             if (value == -999) {
 175                 value = 0;
 176             } else {
 177                 value += 2;
 178             }
 179         } else if (chrono == ThaiBuddhistChrono.INSTANCE) {
 180             type = "buddhist";













 181         } else {
 182             return null;
 183         }
 184         return CalendarDataUtility.retrieveFieldValueName(
 185             type, Calendar.ERA, (int)value, toStyle(style), locale);
 186     }
 187 
 188     /**
 189      * Gets an iterator of text to field for the specified field, locale and style
 190      * for the purpose of parsing.
 191      * <p>
 192      * The iterator must be returned in order from the longest text to the shortest.
 193      * <p>
 194      * The null return value should be used if there is no applicable parsable text, or
 195      * if the text would be a numeric representation of the value.
 196      * Text can only be parsed if all the values for that field-style-locale combination are unique.
 197      *
 198      * @param field  the field to get text for, not null
 199      * @param style  the style to get text for, null for all parsable text
 200      * @param locale  the locale to get text for, not null
 201      * @return the iterator of text to field pairs, in order from longest text to shortest text,
 202      *  null if the field or style is not parsable
 203      */
 204     public Iterator<Entry<String, Long>> getTextIterator(TemporalField field, TextStyle style, Locale locale) {
 205         Object store = findStore(field, locale);
 206         if (store instanceof LocaleStore) {
 207             return ((LocaleStore) store).getTextIterator(style);
 208         }
 209         return null;
 210     }
 211 


















































































 212     private Object findStore(TemporalField field, Locale locale) {
 213         Entry<TemporalField, Locale> key = createEntry(field, locale);
 214         Object store = CACHE.get(key);
 215         if (store == null) {
 216             store = createStore(field, locale);
 217             CACHE.putIfAbsent(key, store);
 218             store = CACHE.get(key);
 219         }
 220         return store;
 221     }
 222 
 223     private static int toWeekDay(int calWeekDay) {
 224         if (calWeekDay == Calendar.SUNDAY) {
 225             return 7;
 226         } else {
 227             return calWeekDay - 1;
 228         }
 229     }
 230 
 231     private Object createStore(TemporalField field, Locale locale) {
 232         CalendarNameProvider provider = LocaleProviderAdapter.getAdapter(CalendarNameProvider.class, locale)
 233                                                              .getCalendarNameProvider();
 234         Map<TextStyle, Map<Long, String>> styleMap = new HashMap<>();















 235         if (field == MONTH_OF_YEAR) {
 236             Map<Long, String> map = new HashMap<>();
 237             for (Entry<String, Integer> entry :
 238                  provider.getDisplayNames("gregory", Calendar.MONTH, Calendar.LONG_FORMAT, locale).entrySet()) {
 239                 map.put((long)(entry.getValue() + 1), entry.getKey());

 240             }
 241             styleMap.put(TextStyle.FULL, map);
 242 
 243             map = new HashMap<>();
 244             for (Entry<String, Integer> entry :
 245                  provider.getDisplayNames("gregory", Calendar.MONTH, Calendar.SHORT_FORMAT, locale).entrySet()) {
 246                 map.put((long)(entry.getValue() + 1), entry.getKey());

 247             }
 248             styleMap.put(TextStyle.SHORT, map);
 249 
 250             map = new HashMap<>();
 251             for (int month = Calendar.JANUARY; month <= Calendar.DECEMBER; month++) {
 252                 String name = provider.getDisplayName("gregory", Calendar.MONTH, month, Calendar.NARROW_STANDALONE, locale);


 253                 if (name != null) {
 254                     map.put((long)(month + 1), name);
 255                 }
 256             }
 257             if (map.size() != 0) {
 258                 styleMap.put(TextStyle.NARROW, map);
 259             }
 260             return new LocaleStore(styleMap);
 261         }

 262         if (field == DAY_OF_WEEK) {
 263             Map<Long, String> map = new HashMap<>();
 264             for (Entry<String, Integer> entry :
 265                  provider.getDisplayNames("gregory", Calendar.DAY_OF_WEEK, Calendar.LONG_FORMAT, locale).entrySet()) {

 266                 map.put((long)toWeekDay(entry.getValue()), entry.getKey());
 267             }
 268             styleMap.put(TextStyle.FULL, map);
 269             map = new HashMap<>();
 270             for (Entry<String, Integer> entry :
 271                  provider.getDisplayNames("gregory", Calendar.DAY_OF_WEEK, Calendar.SHORT_FORMAT, locale).entrySet()) {
 272                 map.put((long)toWeekDay(entry.getValue()), entry.getKey());

 273             }
 274             styleMap.put(TextStyle.SHORT, map);
 275             map = new HashMap<>();
 276             for (int wday = Calendar.SUNDAY; wday <= Calendar.SATURDAY; wday++) {
 277                 map.put((long)toWeekDay(wday),
 278                         provider.getDisplayName("gregory", Calendar.DAY_OF_WEEK, wday, Calendar.NARROW_FORMAT, locale));

 279             }
 280             styleMap.put(TextStyle.NARROW, map);
 281             return new LocaleStore(styleMap);
 282         }

 283         if (field == AMPM_OF_DAY) {
 284             Map<Long, String> map = new HashMap<>();
 285             for (Entry<String, Integer> entry :
 286                  provider.getDisplayNames("gregory", Calendar.AM_PM, Calendar.LONG_FORMAT, locale).entrySet()) {
 287                 map.put((long)entry.getValue(), entry.getKey());

 288             }
 289             styleMap.put(TextStyle.FULL, map);
 290             styleMap.put(TextStyle.SHORT, map);  // re-use, as we don't have different data
 291             return new LocaleStore(styleMap);
 292         }

 293         return "";  // null marker for map
 294     }
 295 
 296     /**
 297      * Helper method to create an immutable entry.
 298      *
 299      * @param text  the text, not null
 300      * @param field  the field, not null
 301      * @return the entry, not null
 302      */
 303     private static <A, B> Entry<A, B> createEntry(A text, B field) {
 304         return new SimpleImmutableEntry<>(text, field);
 305     }
 306 
 307     /**
 308      * Stores the text for a single locale.
 309      * <p>
 310      * Some fields have a textual representation, such as day-of-week or month-of-year.
 311      * These textual representations can be captured in this class for printing
 312      * and parsing.




  46  *  * Neither the name of JSR-310 nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  54  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  55  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  56  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  57  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  58  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  59  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  60  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  */
  62 package java.time.format;
  63 
  64 import static java.time.temporal.ChronoField.AMPM_OF_DAY;
  65 import static java.time.temporal.ChronoField.DAY_OF_WEEK;
  66 import static java.time.temporal.ChronoField.ERA;
  67 import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
  68 
  69 import java.time.chrono.Chronology;
  70 import java.time.chrono.IsoChronology;
  71 import java.time.chrono.JapaneseChronology;
  72 import java.time.temporal.ChronoField;
  73 import java.time.temporal.TemporalField;
  74 import java.util.AbstractMap.SimpleImmutableEntry;
  75 import java.util.ArrayList;
  76 import java.util.Calendar;
  77 import java.util.Collections;
  78 import java.util.Comparator;
  79 import java.util.HashMap;
  80 import java.util.Iterator;
  81 import java.util.List;
  82 import java.util.Locale;
  83 import java.util.Map;
  84 import java.util.Map.Entry;
  85 import java.util.concurrent.ConcurrentHashMap;
  86 import java.util.concurrent.ConcurrentMap;

  87 

  88 import sun.util.locale.provider.CalendarDataUtility;
  89 
  90 /**
  91  * A provider to obtain the textual form of a date-time field.
  92  *
  93  * <h3>Specification for implementors</h3>
  94  * Implementations must be thread-safe.
  95  * Implementations should cache the textual information.
  96  *
  97  * @since 1.8
  98  */
  99 class DateTimeTextProvider {
 100 
 101     /** Cache. */
 102     private static final ConcurrentMap<Entry<TemporalField, Locale>, Object> CACHE = new ConcurrentHashMap<>(16, 0.75f, 2);
 103     /** Comparator. */
 104     private static final Comparator<Entry<String, Long>> COMPARATOR = new Comparator<Entry<String, Long>>() {
 105         @Override
 106         public int compare(Entry<String, Long> obj1, Entry<String, Long> obj2) {
 107             return obj2.getKey().length() - obj1.getKey().length();  // longest to shortest
 108         }
 109     };
 110 
 111     DateTimeTextProvider() {}
 112 
 113     /**
 114      * Gets the provider of text.
 115      *
 116      * @return the provider, not null
 117      */
 118     static DateTimeTextProvider getInstance() {
 119         return new DateTimeTextProvider();
 120     }
 121 
 122     /**
 123      * Gets the text for the specified field, locale and style
 124      * for the purpose of formatting.
 125      * <p>
 126      * The text associated with the value is returned.
 127      * The null return value should be used if there is no applicable text, or
 128      * if the text would be a numeric representation of the value.
 129      *
 130      * @param field  the field to get text for, not null
 131      * @param value  the field value to get text for, not null
 132      * @param style  the style to get text for, not null
 133      * @param locale  the locale to get text for, not null
 134      * @return the text for the field value, null if no text found
 135      */
 136     public String getText(TemporalField field, long value, TextStyle style, Locale locale) {
 137         Object store = findStore(field, locale);
 138         if (store instanceof LocaleStore) {
 139             return ((LocaleStore) store).getText(value, style);
 140         }
 141         return null;
 142     }
 143 
 144     private static int toStyle(TextStyle style) {
 145         if (style == TextStyle.FULL) {
 146             return Calendar.LONG_FORMAT;
 147         } else if (style == TextStyle.SHORT) {
 148             return Calendar.SHORT_FORMAT;
 149         }
 150         return Calendar.NARROW_STANDALONE;
 151     }
 152 
 153     /**
 154      * Gets the text for the specified chrono, field, locale and style
 155      * for the purpose of formatting.
 156      * <p>
 157      * The text associated with the value is returned.
 158      * The null return value should be used if there is no applicable text, or
 159      * if the text would be a numeric representation of the value.
 160      *
 161      * @param chrono the Chronology to get text for, not null
 162      * @param field  the field to get text for, not null
 163      * @param value  the field value to get text for, not null
 164      * @param style  the style to get text for, not null
 165      * @param locale  the locale to get text for, not null
 166      * @return the text for the field value, null if no text found
 167      */
 168     public String getText(Chronology chrono, TemporalField field, long value,
 169                                     TextStyle style, Locale locale) {
 170         if (chrono == IsoChronology.INSTANCE
 171                 || !(field instanceof ChronoField)) {
 172             return getText(field, value, style, locale);
 173         }
 174 
 175         int fieldIndex;
 176         int fieldValue;
 177         if (field == ERA) {
 178             fieldIndex = Calendar.ERA;
 179             if (chrono == JapaneseChronology.INSTANCE) {
 180                 if (value == -999) {
 181                     fieldValue = 0;
 182                 } else {
 183                     fieldValue = (int) value + 2;
 184                 }
 185             } else {
 186                 fieldValue = (int) value;
 187             }
 188         } else if (field == MONTH_OF_YEAR) {
 189             fieldIndex = Calendar.MONTH;
 190             fieldValue = (int) value - 1;
 191         } else if (field == DAY_OF_WEEK) {
 192             fieldIndex = Calendar.DAY_OF_WEEK;
 193             fieldValue = (int) value + 1;
 194             if (fieldValue > 7) {
 195                 fieldValue = Calendar.SUNDAY;
 196             }
 197         } else if (field == AMPM_OF_DAY) {
 198             fieldIndex = Calendar.AM_PM;
 199             fieldValue = (int) value;
 200         } else {
 201             return null;
 202         }
 203         return CalendarDataUtility.retrieveCldrFieldValueName(
 204                 chrono.getCalendarType(), fieldIndex, fieldValue, toStyle(style), locale);
 205     }
 206 
 207     /**
 208      * Gets an iterator of text to field for the specified field, locale and style
 209      * for the purpose of parsing.
 210      * <p>
 211      * The iterator must be returned in order from the longest text to the shortest.
 212      * <p>
 213      * The null return value should be used if there is no applicable parsable text, or
 214      * if the text would be a numeric representation of the value.
 215      * Text can only be parsed if all the values for that field-style-locale combination are unique.
 216      *
 217      * @param field  the field to get text for, not null
 218      * @param style  the style to get text for, null for all parsable text
 219      * @param locale  the locale to get text for, not null
 220      * @return the iterator of text to field pairs, in order from longest text to shortest text,
 221      *  null if the field or style is not parsable
 222      */
 223     public Iterator<Entry<String, Long>> getTextIterator(TemporalField field, TextStyle style, Locale locale) {
 224         Object store = findStore(field, locale);
 225         if (store instanceof LocaleStore) {
 226             return ((LocaleStore) store).getTextIterator(style);
 227         }
 228         return null;
 229     }
 230 
 231     /**
 232      * Gets an iterator of text to field for the specified chrono, field, locale and style
 233      * for the purpose of parsing.
 234      * <p>
 235      * The iterator must be returned in order from the longest text to the shortest.
 236      * <p>
 237      * The null return value should be used if there is no applicable parsable text, or
 238      * if the text would be a numeric representation of the value.
 239      * Text can only be parsed if all the values for that field-style-locale combination are unique.
 240      *
 241      * @param chrono the Chronology to get text for, not null
 242      * @param field  the field to get text for, not null
 243      * @param style  the style to get text for, null for all parsable text
 244      * @param locale  the locale to get text for, not null
 245      * @return the iterator of text to field pairs, in order from longest text to shortest text,
 246      *  null if the field or style is not parsable
 247      */
 248     public Iterator<Entry<String, Long>> getTextIterator(Chronology chrono, TemporalField field,
 249                                                          TextStyle style, Locale locale) {
 250         if (chrono == IsoChronology.INSTANCE
 251                 || !(field instanceof ChronoField)) {
 252             return getTextIterator(field, style, locale);
 253         }
 254 
 255         int fieldIndex;
 256         switch ((ChronoField)field) {
 257         case ERA:
 258             fieldIndex = Calendar.ERA;
 259             break;
 260         case MONTH_OF_YEAR:
 261             fieldIndex = Calendar.MONTH;
 262             break;
 263         case DAY_OF_WEEK:
 264             fieldIndex = Calendar.DAY_OF_WEEK;
 265             break;
 266         case AMPM_OF_DAY:
 267             fieldIndex = Calendar.AM_PM;
 268             break;
 269         default:
 270             return null;
 271         }
 272 
 273         Map<String, Integer> map = CalendarDataUtility.retrieveCldrFieldValueNames(
 274                 chrono.getCalendarType(), fieldIndex, toStyle(style), locale);
 275         if (map == null) {
 276             return null;
 277         }
 278 
 279         List<Entry<String, Long>> list = new ArrayList<>(map.size());
 280         switch (fieldIndex) {
 281         case Calendar.ERA:
 282             for (String key : map.keySet()) {
 283                 int era = map.get(key);
 284                 if (chrono == JapaneseChronology.INSTANCE) {
 285                     if (era == 0) {
 286                         era = -999;
 287                     } else {
 288                         era -= 2;
 289                     }
 290                 }
 291                 list.add(createEntry(key, (long) era));
 292             }
 293             break;
 294         case Calendar.MONTH:
 295             for (String key : map.keySet()) {
 296                 list.add(createEntry(key, (long)(map.get(key) + 1)));
 297             }
 298             break;
 299         case Calendar.DAY_OF_WEEK:
 300             for (String key : map.keySet()) {
 301                 list.add(createEntry(key, (long)toWeekDay(map.get(key))));
 302             }
 303             break;
 304         default:
 305             for (String key : map.keySet()) {
 306                 list.add(createEntry(key, (long)map.get(key)));
 307             }
 308             break;
 309         }
 310         return list.iterator();
 311     }
 312 
 313     private Object findStore(TemporalField field, Locale locale) {
 314         Entry<TemporalField, Locale> key = createEntry(field, locale);
 315         Object store = CACHE.get(key);
 316         if (store == null) {
 317             store = createStore(field, locale);
 318             CACHE.putIfAbsent(key, store);
 319             store = CACHE.get(key);
 320         }
 321         return store;
 322     }
 323 
 324     private static int toWeekDay(int calWeekDay) {
 325         if (calWeekDay == Calendar.SUNDAY) {
 326             return 7;
 327         } else {
 328             return calWeekDay - 1;
 329         }
 330     }
 331 
 332     private Object createStore(TemporalField field, Locale locale) {


 333         Map<TextStyle, Map<Long, String>> styleMap = new HashMap<>();
 334         if (field == ERA) {
 335             for (TextStyle textStyle : TextStyle.values()) {
 336                 Map<Long, String> map = new HashMap<>();
 337                 for (Entry<String, Integer> entry :
 338                         CalendarDataUtility.retrieveCldrFieldValueNames(
 339                         "gregory", Calendar.ERA, toStyle(textStyle), locale).entrySet()) {
 340                     map.put((long) entry.getValue(), entry.getKey());
 341                 }
 342                 if (!map.isEmpty()) {
 343                     styleMap.put(textStyle, map);
 344                 }
 345             }
 346             return new LocaleStore(styleMap);
 347         }
 348 
 349         if (field == MONTH_OF_YEAR) {
 350             Map<Long, String> map = new HashMap<>();
 351             for (Entry<String, Integer> entry :
 352                     CalendarDataUtility.retrieveCldrFieldValueNames(
 353                     "gregory", Calendar.MONTH, Calendar.LONG_FORMAT, locale).entrySet()) {
 354                 map.put((long) (entry.getValue() + 1), entry.getKey());
 355             }
 356             styleMap.put(TextStyle.FULL, map);
 357 
 358             map = new HashMap<>();
 359             for (Entry<String, Integer> entry :
 360                     CalendarDataUtility.retrieveCldrFieldValueNames(
 361                     "gregory", Calendar.MONTH, Calendar.SHORT_FORMAT, locale).entrySet()) {
 362                 map.put((long) (entry.getValue() + 1), entry.getKey());
 363             }
 364             styleMap.put(TextStyle.SHORT, map);
 365 
 366             map = new HashMap<>();
 367             for (int month = Calendar.JANUARY; month <= Calendar.DECEMBER; month++) {
 368                 String name;
 369                 name = CalendarDataUtility.retrieveCldrFieldValueName(
 370                         "gregory", Calendar.MONTH, month, Calendar.NARROW_STANDALONE, locale);
 371                 if (name != null) {
 372                     map.put((long)(month + 1), name);
 373                 }
 374             }
 375             if (!map.isEmpty()) {
 376                 styleMap.put(TextStyle.NARROW, map);
 377             }
 378             return new LocaleStore(styleMap);
 379         }
 380 
 381         if (field == DAY_OF_WEEK) {
 382             Map<Long, String> map = new HashMap<>();
 383             for (Entry<String, Integer> entry :
 384                  CalendarDataUtility.retrieveCldrFieldValueNames(
 385                     "gregory", Calendar.DAY_OF_WEEK, Calendar.LONG_FORMAT, locale).entrySet()) {
 386                 map.put((long)toWeekDay(entry.getValue()), entry.getKey());
 387             }
 388             styleMap.put(TextStyle.FULL, map);
 389             map = new HashMap<>();
 390             for (Entry<String, Integer> entry :
 391                     CalendarDataUtility.retrieveCldrFieldValueNames(
 392                     "gregory", Calendar.DAY_OF_WEEK, Calendar.SHORT_FORMAT, locale).entrySet()) {
 393                 map.put((long) toWeekDay(entry.getValue()), entry.getKey());
 394             }
 395             styleMap.put(TextStyle.SHORT, map);
 396             map = new HashMap<>();
 397             for (int wday = Calendar.SUNDAY; wday <= Calendar.SATURDAY; wday++) {
 398                 map.put((long) toWeekDay(wday),
 399                         CalendarDataUtility.retrieveCldrFieldValueName(
 400                         "gregory", Calendar.DAY_OF_WEEK, wday, Calendar.NARROW_FORMAT, locale));
 401             }
 402             styleMap.put(TextStyle.NARROW, map);
 403             return new LocaleStore(styleMap);
 404         }
 405 
 406         if (field == AMPM_OF_DAY) {
 407             Map<Long, String> map = new HashMap<>();
 408             for (Entry<String, Integer> entry :
 409                     CalendarDataUtility.retrieveCldrFieldValueNames(
 410                     "gregory", Calendar.AM_PM, Calendar.LONG_FORMAT, locale).entrySet()) {
 411                 map.put((long) entry.getValue(), entry.getKey());
 412             }
 413             styleMap.put(TextStyle.FULL, map);
 414             styleMap.put(TextStyle.SHORT, map);  // re-use, as we don't have different data
 415             return new LocaleStore(styleMap);
 416         }
 417 
 418         return "";  // null marker for map
 419     }
 420 
 421     /**
 422      * Helper method to create an immutable entry.
 423      *
 424      * @param text  the text, not null
 425      * @param field  the field, not null
 426      * @return the entry, not null
 427      */
 428     private static <A, B> Entry<A, B> createEntry(A text, B field) {
 429         return new SimpleImmutableEntry<>(text, field);
 430     }
 431 
 432     /**
 433      * Stores the text for a single locale.
 434      * <p>
 435      * Some fields have a textual representation, such as day-of-week or month-of-year.
 436      * These textual representations can be captured in this class for printing
 437      * and parsing.