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package com.github.lgooddatepicker.zinternaltools;
import java.text.DateFormatSymbols;
import java.time.Month;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.TextStyle;
import java.util.ArrayList;
import java.util.Locale;
/**
* ExtraDateStrings, This class holds extra date strings. This includes: # Formats for parsing dates
* in a particular language. # Overridden month names for particular locales. All the fields and
* functions are static.
*/
public class ExtraDateStrings {
/**
* extraParsingFormatsForLanguage_en, This is a constant list of extra parsing formats, which
* are used for parsing dates in an English locale.
*/
final static private String[] extraParsingFormatsForLanguage_en = new String[]{
"M/d/u", "dMMMuu", "dMMMuuuu", "d MMM uu", "d MMM uuuu", "MMM d, u", "MMM d u",
"MMM d, yyyy G"};
/**
* extraParsingFormatsForLanguage_ru, This is a constant list of extra parsing formats, which
* are used for parsing dates in a Russian locale.
*/
final static private String[] extraParsingFormatsForLanguage_ru = new String[]{
"d MMM uuuu"};
/**
* monthsNamesForLanguage_ru, This is a constant list of "standalone" month names, for the
* Russian locale. This was previously used to supply the Russian month names, but now that this
* class has a generalized solution for getting the standalone month names in all languages,
* this array should only be used for visual reference. This can be used for comparison to
* ensure that the general solution is functioning correctly.
*/
final static public String[] monthsNamesForLanguage_ru = new String[]{"январь", "февраль",
"март", "апрель", "май", "июнь", "июль", "август", "сентябрь", "октябрь", "ноябрь", "декабрь"};
/**
* getExtraParsingFormatsForLocale, This will return a list of extra parsing formatters for the
* specified locale. If no extra formatters are found, then this will return an empty list.
* (This will never return null.)
*/
public static ArrayList getExtraParsingFormatsForLocale(Locale locale) {
// Create some variables that we will need.
String language = locale.getLanguage();
String[] definedFormats = null;
// Get the list of extra parsing formats for the language of the locale.
if ("en".equals(language)) {
definedFormats = extraParsingFormatsForLanguage_en;
}
if ("ru".equals(language)) {
definedFormats = extraParsingFormatsForLanguage_ru;
}
// If no extra parsing formats were found, then return an empty list.
ArrayList extraParsingFormatters = new ArrayList();
if (definedFormats == null) {
return extraParsingFormatters;
}
// Create the parsing formatters from the defined formats, and add them to the results list.
DateTimeFormatter formatter;
for (String formatString : definedFormats) {
formatter = new DateTimeFormatterBuilder().parseLenient().parseCaseInsensitive().
appendPattern(formatString).toFormatter(locale);
extraParsingFormatters.add(formatter);
}
// Return the results.
return extraParsingFormatters;
}
/**
* getDefaultStandaloneLongMonthNamesForLocale, This will return a list of capitalized,
* translated, standalone month names for the specified locale. This function will always return
* a list with 12 elements, and each element will always contain a string. This will never
* return a null array, or any null elements.
*
* Implementation note: it was previously required to override the month names in certain
* languages such as Russian, to get the proper grammar. At this point, a generalized solution
* has been implemented for all languages. It is assumed that this solution is working
* correctly, unless and until someone reports that it is not working correctly for their
* language.
*/
public static String[] getDefaultStandaloneLongMonthNamesForLocale(Locale locale) {
// Get the standalone version of the month names for the specified language.
String[] monthNames = getStandaloneMonthNamesArray(locale, true, false);
// Return the array of month names.
return monthNames;
}
public static String[] getDefaultStandaloneShortMonthNamesForLocale(Locale locale) {
// Get the standalone version of the month names for the specified language.
String[] monthNames = getStandaloneMonthNamesArray(locale, true, true);
// Return the array of month names.
return monthNames;
}
/**
* getStandaloneMonthName, This returns a "standalone version" month name for the specified
* month, in the specified locale. In some languages, including Russian and Czech, the
* standalone version of the month name is different from the version of the month name you
* would use as part of a full date. (Is different from the formatting version).
*
* This tries to get the standalone version first. If no mapping is found for a standalone
* version (Presumably because the supplied language has no standalone version), then this will
* return the formatting version of the month name.
*/
private static String getStandaloneMonthName(Month month, Locale locale, boolean capitalize,
boolean shortVersion) {
// Attempt to get the standalone version of the month name.
TextStyle style = (shortVersion) ? TextStyle.SHORT_STANDALONE : TextStyle.FULL_STANDALONE;
String monthName = month.getDisplayName(style, locale);
String monthNumber = "" + month.getValue();
// If no mapping was found, then get the "formatting version" of the month name.
if (monthName.equals(monthNumber)) {
DateFormatSymbols dateSymbols = DateFormatSymbols.getInstance(locale);
if (shortVersion) {
monthName = dateSymbols.getShortMonths()[month.getValue() - 1];
} else {
monthName = dateSymbols.getMonths()[month.getValue() - 1];
}
}
// If needed, capitalize the month name.
if ((capitalize) && (monthName != null) && (monthName.length() > 0)) {
monthName = monthName.substring(0, 1).toUpperCase(locale) + monthName.substring(1);
}
return monthName;
}
/**
* getStandaloneMonthNamesArray, This returns an array with the standalone version of all the
* full month names.
*/
private static String[] getStandaloneMonthNamesArray(Locale locale, boolean capitalize,
boolean shortVersion) {
Month[] monthEnums = Month.values();
ArrayList monthNamesArrayList = new ArrayList();
for (Month monthEnum : monthEnums) {
monthNamesArrayList.add(getStandaloneMonthName(monthEnum, locale, capitalize, shortVersion));
}
// Convert the arraylist to a string array, and return the array.
String[] monthNames = monthNamesArrayList.toArray(new String[]{});
return monthNames;
}
/**
* getFormattingMonthName, This returns a "formatting version" month name for the specified
* month, in the specified locale. In some languages, including Russian and Czech, the
* standalone version of the month name is different from the version of the month name you
* would use as part of a full date. (Is different from the formatting version).
*/
private static String getFormattingMonthName(Month month, Locale locale, boolean capitalize,
boolean shortVersion) {
// Get the "formatting version" of the month name.
DateFormatSymbols dateSymbols = DateFormatSymbols.getInstance(locale);
String monthName;
if (shortVersion) {
monthName = dateSymbols.getShortMonths()[month.getValue() - 1];
} else {
monthName = dateSymbols.getMonths()[month.getValue() - 1];
}
// If needed, capitalize the month name.
if ((capitalize) && (monthName != null) && (monthName.length() > 0)) {
monthName = monthName.substring(0, 1).toUpperCase(locale) + monthName.substring(1);
}
return monthName;
}
/**
* getFormattingMonthNamesArray, This returns an array with the translated, formatting version
* of the month names for the specified locale. (The "formatting version" of the month names can
* be different from the standalone version in some locales, including Russian and Czech. The
* formatting version would be used in a formatted date, and the standalone version would be
* used if the month is being specified by itself.)
*
* capitalize: This specifies whether the month name should be capitalized or not capitalized.
* shortVersion: This specifies whether the month names should be the short, or long versions of
* the formatting month names.
*/
public static String[] getFormattingMonthNamesArray(Locale locale, boolean capitalize,
boolean shortVersion) {
Month[] monthEnums = Month.values();
ArrayList monthNamesArrayList = new ArrayList();
for (Month monthEnum : monthEnums) {
monthNamesArrayList.add(getFormattingMonthName(
monthEnum, locale, capitalize, shortVersion));
}
// Convert the arraylist to a string array, and return the array.
String[] monthNames = monthNamesArrayList.toArray(new String[]{});
return monthNames;
}
}
