obj2) {
return obj2.getKey().length() - obj1.getKey().length(); // longest to shortest
}
};
DateTimeTextProvider() {}
/**
* Gets the provider of text.
*
* @return the provider, not null
*/
static DateTimeTextProvider getInstance() {
return new DateTimeTextProvider();
}
/**
* Gets the text for the specified field, locale and style
* for the purpose of formatting.
*
* The text associated with the value is returned.
* The null return value should be used if there is no applicable text, or
* if the text would be a numeric representation of the value.
*
* @param field the field to get text for, not null
* @param value the field value to get text for, not null
* @param style the style to get text for, not null
* @param locale the locale to get text for, not null
* @return the text for the field value, null if no text found
*/
public String getText(TemporalField field, long value, TextStyle style, Locale locale) {
Object store = findStore(field, locale);
if (store instanceof LocaleStore) {
return ((LocaleStore) store).getText(value, style);
}
return null;
}
/**
* Gets the text for the specified chrono, field, locale and style
* for the purpose of formatting.
*
* The text associated with the value is returned.
* The null return value should be used if there is no applicable text, or
* if the text would be a numeric representation of the value.
*
* @param chrono the Chronology to get text for, not null
* @param field the field to get text for, not null
* @param value the field value to get text for, not null
* @param style the style to get text for, not null
* @param locale the locale to get text for, not null
* @return the text for the field value, null if no text found
*/
public String getText(Chronology chrono, TemporalField field, long value,
TextStyle style, Locale locale) {
if (chrono == IsoChronology.INSTANCE
|| !(field instanceof ChronoField)) {
return getText(field, value, style, locale);
}
int fieldIndex;
int fieldValue;
if (field == ERA) {
fieldIndex = Calendar.ERA;
if (chrono == JapaneseChronology.INSTANCE) {
if (value == -999) {
fieldValue = 0;
} else {
fieldValue = (int) value + 2;
}
} else {
fieldValue = (int) value;
}
} else if (field == MONTH_OF_YEAR) {
fieldIndex = Calendar.MONTH;
fieldValue = (int) value - 1;
} else if (field == DAY_OF_WEEK) {
fieldIndex = Calendar.DAY_OF_WEEK;
fieldValue = (int) value + 1;
if (fieldValue > 7) {
fieldValue = Calendar.SUNDAY;
}
} else if (field == AMPM_OF_DAY) {
fieldIndex = Calendar.AM_PM;
fieldValue = (int) value;
} else {
return null;
}
return CalendarDataUtility.retrieveJavaTimeFieldValueName(
chrono.getCalendarType(), fieldIndex, fieldValue, style.toCalendarStyle(), locale);
}
/**
* Gets an iterator of text to field for the specified field, locale and style
* for the purpose of parsing.
*
* The iterator must be returned in order from the longest text to the shortest.
*
* The null return value should be used if there is no applicable parsable text, or
* if the text would be a numeric representation of the value.
* Text can only be parsed if all the values for that field-style-locale combination are unique.
*
* @param field the field to get text for, not null
* @param style the style to get text for, null for all parsable text
* @param locale the locale to get text for, not null
* @return the iterator of text to field pairs, in order from longest text to shortest text,
* null if the field or style is not parsable
*/
public Iterator> getTextIterator(TemporalField field, TextStyle style, Locale locale) {
Object store = findStore(field, locale);
if (store instanceof LocaleStore) {
return ((LocaleStore) store).getTextIterator(style);
}
return null;
}
/**
* Gets an iterator of text to field for the specified chrono, field, locale and style
* for the purpose of parsing.
*
* The iterator must be returned in order from the longest text to the shortest.
*
* The null return value should be used if there is no applicable parsable text, or
* if the text would be a numeric representation of the value.
* Text can only be parsed if all the values for that field-style-locale combination are unique.
*
* @param chrono the Chronology to get text for, not null
* @param field the field to get text for, not null
* @param style the style to get text for, null for all parsable text
* @param locale the locale to get text for, not null
* @return the iterator of text to field pairs, in order from longest text to shortest text,
* null if the field or style is not parsable
*/
public Iterator> getTextIterator(Chronology chrono, TemporalField field,
TextStyle style, Locale locale) {
if (chrono == IsoChronology.INSTANCE
|| !(field instanceof ChronoField)) {
return getTextIterator(field, style, locale);
}
int fieldIndex;
switch ((ChronoField)field) {
case ERA:
fieldIndex = Calendar.ERA;
break;
case MONTH_OF_YEAR:
fieldIndex = Calendar.MONTH;
break;
case DAY_OF_WEEK:
fieldIndex = Calendar.DAY_OF_WEEK;
break;
case AMPM_OF_DAY:
fieldIndex = Calendar.AM_PM;
break;
default:
return null;
}
int calendarStyle = (style == null) ? Calendar.ALL_STYLES : style.toCalendarStyle();
Map map = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
chrono.getCalendarType(), fieldIndex, calendarStyle, locale);
if (map == null) {
return null;
}
List> list = new ArrayList<>(map.size());
switch (fieldIndex) {
case Calendar.ERA:
for (Map.Entry entry : map.entrySet()) {
int era = entry.getValue();
if (chrono == JapaneseChronology.INSTANCE) {
if (era == 0) {
era = -999;
} else {
era -= 2;
}
}
list.add(createEntry(entry.getKey(), (long)era));
}
break;
case Calendar.MONTH:
for (Map.Entry entry : map.entrySet()) {
list.add(createEntry(entry.getKey(), (long)(entry.getValue() + 1)));
}
break;
case Calendar.DAY_OF_WEEK:
for (Map.Entry entry : map.entrySet()) {
list.add(createEntry(entry.getKey(), (long)toWeekDay(entry.getValue())));
}
break;
default:
for (Map.Entry entry : map.entrySet()) {
list.add(createEntry(entry.getKey(), (long)entry.getValue()));
}
break;
}
return list.iterator();
}
private Object findStore(TemporalField field, Locale locale) {
Entry key = createEntry(field, locale);
Object store = CACHE.get(key);
if (store == null) {
store = createStore(field, locale);
CACHE.putIfAbsent(key, store);
store = CACHE.get(key);
}
return store;
}
private static int toWeekDay(int calWeekDay) {
if (calWeekDay == Calendar.SUNDAY) {
return 7;
} else {
return calWeekDay - 1;
}
}
private Object createStore(TemporalField field, Locale locale) {
Map> styleMap = new HashMap<>();
if (field == ERA) {
for (TextStyle textStyle : TextStyle.values()) {
if (textStyle.isStandalone()) {
// Stand-alone isn't applicable to era names.
continue;
}
Map displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
"gregory", Calendar.ERA, textStyle.toCalendarStyle(), locale);
if (displayNames != null) {
Map map = new HashMap<>();
for (Entry entry : displayNames.entrySet()) {
map.put((long) entry.getValue(), entry.getKey());
}
if (!map.isEmpty()) {
styleMap.put(textStyle, map);
}
}
}
return new LocaleStore(styleMap);
}
if (field == MONTH_OF_YEAR) {
for (TextStyle textStyle : TextStyle.values()) {
Map displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
"gregory", Calendar.MONTH, textStyle.toCalendarStyle(), locale);
Map map = new HashMap<>();
if (displayNames != null) {
for (Entry entry : displayNames.entrySet()) {
map.put((long) (entry.getValue() + 1), entry.getKey());
}
} else {
// Narrow names may have duplicated names, such as "J" for January, Jun, July.
// Get names one by one in that case.
for (int month = Calendar.JANUARY; month <= Calendar.DECEMBER; month++) {
String name;
name = CalendarDataUtility.retrieveJavaTimeFieldValueName(
"gregory", Calendar.MONTH, month, textStyle.toCalendarStyle(), locale);
if (name == null) {
break;
}
map.put((long) (month + 1), name);
}
}
if (!map.isEmpty()) {
styleMap.put(textStyle, map);
}
}
return new LocaleStore(styleMap);
}
if (field == DAY_OF_WEEK) {
for (TextStyle textStyle : TextStyle.values()) {
Map displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
"gregory", Calendar.DAY_OF_WEEK, textStyle.toCalendarStyle(), locale);
Map map = new HashMap<>();
if (displayNames != null) {
for (Entry entry : displayNames.entrySet()) {
map.put((long)toWeekDay(entry.getValue()), entry.getKey());
}
} else {
// Narrow names may have duplicated names, such as "S" for Sunday and Saturday.
// Get names one by one in that case.
for (int wday = Calendar.SUNDAY; wday <= Calendar.SATURDAY; wday++) {
String name;
name = CalendarDataUtility.retrieveJavaTimeFieldValueName(
"gregory", Calendar.DAY_OF_WEEK, wday, textStyle.toCalendarStyle(), locale);
if (name == null) {
break;
}
map.put((long)toWeekDay(wday), name);
}
}
if (!map.isEmpty()) {
styleMap.put(textStyle, map);
}
}
return new LocaleStore(styleMap);
}
if (field == AMPM_OF_DAY) {
for (TextStyle textStyle : TextStyle.values()) {
if (textStyle.isStandalone()) {
// Stand-alone isn't applicable to AM/PM.
continue;
}
Map displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
"gregory", Calendar.AM_PM, textStyle.toCalendarStyle(), locale);
if (displayNames != null) {
Map map = new HashMap<>();
for (Entry entry : displayNames.entrySet()) {
map.put((long) entry.getValue(), entry.getKey());
}
if (!map.isEmpty()) {
styleMap.put(textStyle, map);
}
}
}
return new LocaleStore(styleMap);
}
if (field == IsoFields.QUARTER_OF_YEAR) {
// The order of keys must correspond to the TextStyle.values() order.
final String[] keys = {
"QuarterNames",
"standalone.QuarterNames",
"QuarterAbbreviations",
"standalone.QuarterAbbreviations",
"QuarterNarrows",
"standalone.QuarterNarrows",
};
for (int i = 0; i < keys.length; i++) {
String[] names = getLocalizedResource(keys[i], locale);
if (names != null) {
Map map = new HashMap<>();
for (int q = 0; q < names.length; q++) {
map.put((long) (q + 1), names[q]);
}
styleMap.put(TextStyle.values()[i], map);
}
}
return new LocaleStore(styleMap);
}
return ""; // null marker for map
}
/**
* Helper method to create an immutable entry.
*
* @param text the text, not null
* @param field the field, not null
* @return the entry, not null
*/
private static Entry createEntry(A text, B field) {
return new SimpleImmutableEntry<>(text, field);
}
/**
* Returns the localized resource of the given key and locale, or null
* if no localized resource is available.
*
* @param key the key of the localized resource, not null
* @param locale the locale, not null
* @return the localized resource, or null if not available
* @throws NullPointerException if key or locale is null
*/
@SuppressWarnings("unchecked")
static T getLocalizedResource(String key, Locale locale) {
LocaleResources lr = LocaleProviderAdapter.getResourceBundleBased()
.getLocaleResources(locale);
ResourceBundle rb = lr.getJavaTimeFormatData();
return rb.containsKey(key) ? (T) rb.getObject(key) : null;
}
/**
* Stores the text for a single locale.
*
* Some fields have a textual representation, such as day-of-week or month-of-year.
* These textual representations can be captured in this class for printing
* and parsing.
*
* This class is immutable and thread-safe.
*/
static final class LocaleStore {
/**
* Map of value to text.
*/
private final Map> valueTextMap;
/**
* Parsable data.
*/
private final Map>> parsable;
/**
* Constructor.
*
* @param valueTextMap the map of values to text to store, assigned and not altered, not null
*/
LocaleStore(Map> valueTextMap) {
this.valueTextMap = valueTextMap;
Map>> map = new HashMap<>();
List> allList = new ArrayList<>();
for (Map.Entry> vtmEntry : valueTextMap.entrySet()) {
Map> reverse = new HashMap<>();
for (Map.Entry entry : vtmEntry.getValue().entrySet()) {
if (reverse.put(entry.getValue(), createEntry(entry.getValue(), entry.getKey())) != null) {
// TODO: BUG: this has no effect
continue; // not parsable, try next style
}
}
List> list = new ArrayList<>(reverse.values());
Collections.sort(list, COMPARATOR);
map.put(vtmEntry.getKey(), list);
allList.addAll(list);
map.put(null, allList);
}
Collections.sort(allList, COMPARATOR);
this.parsable = map;
}
/**
* Gets the text for the specified field value, locale and style
* for the purpose of printing.
*
* @param value the value to get text for, not null
* @param style the style to get text for, not null
* @return the text for the field value, null if no text found
*/
String getText(long value, TextStyle style) {
Map map = valueTextMap.get(style);
return map != null ? map.get(value) : null;
}
/**
* Gets an iterator of text to field for the specified style for the purpose of parsing.
*
* The iterator must be returned in order from the longest text to the shortest.
*
* @param style the style to get text for, null for all parsable text
* @return the iterator of text to field pairs, in order from longest text to shortest text,
* null if the style is not parsable
*/
Iterator> getTextIterator(TextStyle style) {
List> list = parsable.get(style);
return list != null ? list.iterator() : null;
}
}
}