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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
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/*
* This file is available under and governed by the GNU General Public
* License version 2 only, as published by the Free Software Foundation.
* However, the following notice accompanied the original version of this
* file:
*
* Copyright (c) 2011-2012, Stephen Colebourne & Michael Nascimento Santos
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/
package java.time.format;
import static java.time.temporal.ChronoField.AMPM_OF_DAY;
import static java.time.temporal.ChronoField.DAY_OF_WEEK;
import static java.time.temporal.ChronoField.ERA;
import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
import java.text.DateFormatSymbols;
import java.time.chrono.Chronology;
import java.time.chrono.IsoChronology;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalField;
import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* A provider to obtain the textual form of a date-time field.
*
* @implSpec
* Implementations must be thread-safe.
* Implementations should cache the textual information.
*
* @since 1.8
*/
class DateTimeTextProvider {
/** Cache. */
private static final ConcurrentMap<Entry<TemporalField, Locale>, Object> CACHE = new ConcurrentHashMap<>(16, 0.75f, 2);
/** Comparator. */
private static final Comparator<Entry<String, Long>> COMPARATOR = new Comparator<Entry<String, Long>>() {
@Override
public int compare(Entry<String, Long> obj1, Entry<String, Long> 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.
* <p>
* 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.
* <p>
* 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);
}
// For Desugar: return null for non-ISO chronologies to avoid JDK internal helpers.
// TODO(b/73557772): Consider using java.util.Calendar for formatting
return null;
// 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.
* <p>
* The iterator must be returned in order from the longest text to the shortest.
* <p>
* 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<Entry<String, Long>> 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.
* <p>
* The iterator must be returned in order from the longest text to the shortest.
* <p>
* 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<Entry<String, Long>> getTextIterator(Chronology chrono, TemporalField field,
TextStyle style, Locale locale) {
if (chrono == IsoChronology.INSTANCE
|| !(field instanceof ChronoField)) {
return getTextIterator(field, style, locale);
}
// For Desugar: return null for non-ISO chronologies to avoid JDK internal helpers.
// TODO(b/73557772): Try using java.util.Calendar for formatting, which does support non-ISO
return null;
// 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<String, Integer> map = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
// chrono.getCalendarType(), fieldIndex, calendarStyle, locale);
// if (map == null) {
// return null;
// }
// List<Entry<String, Long>> list = new ArrayList<>(map.size());
// switch (fieldIndex) {
// case Calendar.ERA:
// for (Map.Entry<String, Integer> 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<String, Integer> entry : map.entrySet()) {
// list.add(createEntry(entry.getKey(), (long)(entry.getValue() + 1)));
// }
// break;
// case Calendar.DAY_OF_WEEK:
// for (Map.Entry<String, Integer> entry : map.entrySet()) {
// list.add(createEntry(entry.getKey(), (long)toWeekDay(entry.getValue())));
// }
// break;
// default:
// for (Map.Entry<String, Integer> entry : map.entrySet()) {
// list.add(createEntry(entry.getKey(), (long)entry.getValue()));
// }
// break;
// }
// return list.iterator();
}
private Object findStore(TemporalField field, Locale locale) {
Entry<TemporalField, Locale> 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<TextStyle, Map<Long, String>> styleMap = new HashMap<>();
if (field == ERA) {
// For Desugar: Get symbols from DateFormatSymbols, avoiding JDK internal helpers.
// Note we're missing symbols for "standalone" text styles.
// for (TextStyle textStyle : TextStyle.values()) {
// if (textStyle.isStandalone()) {
// // Stand-alone isn't applicable to era names.
// continue;
// }
// Map<String, Integer> displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
// "gregory", Calendar.ERA, textStyle.toCalendarStyle(), locale);
// if (displayNames != null) {
// Map<Long, String> map = new HashMap<>();
// for (Entry<String, Integer> entry : displayNames.entrySet()) {
// map.put((long) entry.getValue(), entry.getKey());
// }
// if (!map.isEmpty()) {
// styleMap.put(textStyle, map);
// }
// }
// }
DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale);
Map<Long, String> fullMap = new HashMap<>();
Map<Long, String> narrowMap = new HashMap<>();
String[] eraSymbols = symbols.getEras();
for (int i = 0; i < eraSymbols.length; ++i) {
if (!eraSymbols[i].isEmpty()) {
fullMap.put((long) i, eraSymbols[i]);
narrowMap.put((long) i, firstCodePoint(eraSymbols[i]));
}
}
if (!fullMap.isEmpty()) {
styleMap.put(TextStyle.FULL, fullMap);
styleMap.put(TextStyle.SHORT, fullMap); // don't have anything else
styleMap.put(TextStyle.NARROW, narrowMap);
}
return new LocaleStore(styleMap);
}
if (field == MONTH_OF_YEAR) {
// For Desugar: Get symbols from DateFormatSymbols, avoiding JDK internal helpers.
// Note we're missing symbols for "standalone" text styles.
// for (TextStyle textStyle : TextStyle.values()) {
// Map<String, Integer> displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
// "gregory", Calendar.MONTH, textStyle.toCalendarStyle(), locale);
// Map<Long, String> map = new HashMap<>();
// if (displayNames != null) {
// for (Entry<String, Integer> 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);
// }
// }
DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale);
Map<Long, String> longMap = new HashMap<>();
Map<Long, String> narrowMap = new HashMap<>();
String[] longMonths = symbols.getMonths();
for (int i = 0; i < longMonths.length; ++i) {
if (!longMonths[i].isEmpty()) {
longMap.put((long) i + 1, longMonths[i]);
narrowMap.put((long) i + 1, firstCodePoint(longMonths[i]));
}
}
if (!longMap.isEmpty()) {
styleMap.put(TextStyle.FULL, longMap);
styleMap.put(TextStyle.NARROW, narrowMap);
}
Map<Long, String> shortMap = new HashMap<>();
String[] shortMonths = symbols.getShortMonths();
for (int i = 0; i < shortMonths.length; ++i) {
if (!shortMonths[i].isEmpty()) {
shortMap.put((long) i + 1, shortMonths[i]);
}
}
if (!shortMap.isEmpty()) {
styleMap.put(TextStyle.SHORT, shortMap);
}
return new LocaleStore(styleMap);
}
if (field == DAY_OF_WEEK) {
// For Desugar: Get symbols from DateFormatSymbols, avoiding JDK internal helpers.
// Note we're missing symbols for "standalone" text styles.
// for (TextStyle textStyle : TextStyle.values()) {
// Map<String, Integer> displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
// "gregory", Calendar.DAY_OF_WEEK, textStyle.toCalendarStyle(), locale);
// Map<Long, String> map = new HashMap<>();
// if (displayNames != null) {
// for (Entry<String, Integer> 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);
// }
// }
DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale);
Map<Long, String> longMap = new HashMap<>();
String[] longSymbols = symbols.getWeekdays();
// per getWeekdays() javadoc Calendar.MONDAY etc. are supposed to be present
longMap.put(1L, longSymbols[Calendar.MONDAY]);
longMap.put(2L, longSymbols[Calendar.TUESDAY]);
longMap.put(3L, longSymbols[Calendar.WEDNESDAY]);
longMap.put(4L, longSymbols[Calendar.THURSDAY]);
longMap.put(5L, longSymbols[Calendar.FRIDAY]);
longMap.put(6L, longSymbols[Calendar.SATURDAY]);
longMap.put(7L, longSymbols[Calendar.SUNDAY]);
styleMap.put(TextStyle.FULL, longMap);
Map<Long, String> narrowMap = new HashMap<>();
narrowMap.put(1L, firstCodePoint(longSymbols[Calendar.MONDAY]));
narrowMap.put(2L, firstCodePoint(longSymbols[Calendar.TUESDAY]));
narrowMap.put(3L, firstCodePoint(longSymbols[Calendar.WEDNESDAY]));
narrowMap.put(4L, firstCodePoint(longSymbols[Calendar.THURSDAY]));
narrowMap.put(5L, firstCodePoint(longSymbols[Calendar.FRIDAY]));
narrowMap.put(6L, firstCodePoint(longSymbols[Calendar.SATURDAY]));
narrowMap.put(7L, firstCodePoint(longSymbols[Calendar.SUNDAY]));
styleMap.put(TextStyle.NARROW, narrowMap);
Map<Long, String> shortMap = new HashMap<>();
String[] shortSymbols = symbols.getShortWeekdays();
shortMap.put(1L, shortSymbols[Calendar.MONDAY]);
shortMap.put(2L, shortSymbols[Calendar.TUESDAY]);
shortMap.put(3L, shortSymbols[Calendar.WEDNESDAY]);
shortMap.put(4L, shortSymbols[Calendar.THURSDAY]);
shortMap.put(5L, shortSymbols[Calendar.FRIDAY]);
shortMap.put(6L, shortSymbols[Calendar.SATURDAY]);
shortMap.put(7L, shortSymbols[Calendar.SUNDAY]);
styleMap.put(TextStyle.SHORT, shortMap);
return new LocaleStore(styleMap);
}
if (field == AMPM_OF_DAY) {
// For Desugar: Get symbols from DateFormatSymbols, avoiding JDK internal helpers.
// Note we're missing symbols for "standalone" text styles.
// for (TextStyle textStyle : TextStyle.values()) {
// if (textStyle.isStandalone()) {
// // Stand-alone isn't applicable to AM/PM.
// continue;
// }
// Map<String, Integer> displayNames = CalendarDataUtility.retrieveJavaTimeFieldValueNames(
// "gregory", Calendar.AM_PM, textStyle.toCalendarStyle(), locale);
// if (displayNames != null) {
// Map<Long, String> map = new HashMap<>();
// for (Entry<String, Integer> entry : displayNames.entrySet()) {
// map.put((long) entry.getValue(), entry.getKey());
// }
// if (!map.isEmpty()) {
// styleMap.put(textStyle, map);
// }
// }
// }
DateFormatSymbols symbols = DateFormatSymbols.getInstance(locale);
Map<Long, String> fullMap = new HashMap<>();
Map<Long, String> narrowMap = new HashMap<>();
String[] amPmSymbols = symbols.getAmPmStrings();
for (int i = 0; i < amPmSymbols.length; ++i) {
if (!amPmSymbols[i].isEmpty()) {
fullMap.put((long) i, amPmSymbols[i]);
narrowMap.put((long) i, firstCodePoint(amPmSymbols[i]));
}
}
if (!fullMap.isEmpty()) {
styleMap.put(TextStyle.FULL, fullMap);
styleMap.put(TextStyle.SHORT, fullMap); // don't have anything else
styleMap.put(TextStyle.NARROW, narrowMap);
}
return new LocaleStore(styleMap);
}
// For Desugar: Avoid JDK internal helpers. Unfortunately we can't get quarter symbols
// from anywhere else so just don't populate them (which means they'll just printed as
// numbers, 1, 2, 3, 4).
// 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<Long, String> 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
}
private static String firstCodePoint(String string) {
return string.substring(0, Character.charCount(string.codePointAt(0)));
}
/**
* 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 <A, B> Entry<A, B> createEntry(A text, B field) {
return new SimpleImmutableEntry<>(text, field);
}
// For desugar: Avoid JDK internals
// /**
// * 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> 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.
* <p>
* 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.
* <p>
* This class is immutable and thread-safe.
*/
static final class LocaleStore {
/**
* Map of value to text.
*/
private final Map<TextStyle, Map<Long, String>> valueTextMap;
/**
* Parsable data.
*/
private final Map<TextStyle, List<Entry<String, Long>>> parsable;
/**
* Constructor.
*
* @param valueTextMap the map of values to text to store, assigned and not altered, not null
*/
LocaleStore(Map<TextStyle, Map<Long, String>> valueTextMap) {
this.valueTextMap = valueTextMap;
Map<TextStyle, List<Entry<String, Long>>> map = new HashMap<>();
List<Entry<String, Long>> allList = new ArrayList<>();
for (Map.Entry<TextStyle, Map<Long, String>> vtmEntry : valueTextMap.entrySet()) {
Map<String, Entry<String, Long>> reverse = new HashMap<>();
for (Map.Entry<Long, String> 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<Entry<String, Long>> 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<Long, String> 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.
* <p>
* 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<Entry<String, Long>> getTextIterator(TextStyle style) {
List<Entry<String, Long>> list = parsable.get(style);
return list != null ? list.iterator() : null;
}
}
}
