100 lines
3.9 KiB
Java
100 lines
3.9 KiB
Java
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/* GENERATED SOURCE. DO NOT MODIFY. */
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2009,2016 International Business Machines Corporation and
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* others. All Rights Reserved.
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*******************************************************************************
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*/
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package android.icu.impl;
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import java.util.Locale;
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import java.util.Map;
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import java.util.MissingResourceException;
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import java.util.TreeMap;
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import android.icu.util.ULocale;
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import android.icu.util.UResourceBundle;
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/**
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* Calendar utilities.
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*
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* Date/time format service classes in android.icu.text packages
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* sometimes need to access calendar internal APIs. But calendar
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* classes are in android.icu.util package, so the package local
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* cannot be used. This class is added in android.icu.impl
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* package for sharing some calendar internal code for calendar
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* and date format.
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* @hide Only a subset of ICU is exposed in Android
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*/
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public final class CalendarUtil {
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private static final String CALKEY = "calendar";
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private static final String DEFCAL = "gregorian";
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/**
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* Returns a calendar type for the given locale.
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* When the given locale has calendar keyword, the
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* value of calendar keyword is returned. Otherwise,
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* the default calendar type for the locale is returned.
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* @param loc The locale
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* @return Calendar type string, such as "gregorian"
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*/
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public static String getCalendarType(ULocale loc) {
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String calType = loc.getKeywordValue(CALKEY);
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if (calType != null) {
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// Convert to lower case, because getKeywordValue does not
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// canonicalize keyword value.
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return calType.toLowerCase(Locale.ROOT);
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}
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// Canonicalize, so that an old-style variant will be transformed to keywords.
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ULocale canonical = ULocale.createCanonical(loc.toString());
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calType = canonical.getKeywordValue(CALKEY);
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if (calType != null) {
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return calType;
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}
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// When calendar keyword is not available, use the locale's
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// region to get the default calendar type
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String region = ULocale.getRegionForSupplementalData(canonical, true);
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return CalendarPreferences.INSTANCE.getCalendarTypeForRegion(region);
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}
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private static final class CalendarPreferences extends UResource.Sink {
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private static final CalendarPreferences INSTANCE = new CalendarPreferences();
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// A TreeMap should be good because we expect very few entries.
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Map<String, String> prefs = new TreeMap<String, String>();
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CalendarPreferences() {
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try {
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ICUResourceBundle rb = (ICUResourceBundle)UResourceBundle.getBundleInstance(
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ICUData.ICU_BASE_NAME, "supplementalData");
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rb.getAllItemsWithFallback("calendarPreferenceData", this);
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} catch (MissingResourceException mre) {
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// Always use "gregorian".
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}
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}
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String getCalendarTypeForRegion(String region) {
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String type = prefs.get(region);
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return type == null ? DEFCAL : type;
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}
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@Override
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public void put(UResource.Key key, UResource.Value value, boolean noFallback) {
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UResource.Table calendarPreferenceData = value.getTable();
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for (int i = 0; calendarPreferenceData.getKeyAndValue(i, key, value); ++i) {
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UResource.Array types = value.getArray();
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// The first calendar type is the default for the region.
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if (types.getValue(0, value)) {
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String type = value.getString();
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if (!type.equals(DEFCAL)) {
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prefs.put(key.toString(), type);
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}
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}
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}
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}
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}
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}
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