/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* 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).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.util.locale.provider;
import static java.util.Calendar.*;
import java.util.Comparator;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.spi.CalendarNameProvider;
/**
* Concrete implementation of the {@link java.util.spi.CalendarDataProvider
* CalendarDataProvider} class for the JRE LocaleProviderAdapter.
*
* @author Masayoshi Okutsu
* @author Naoto Sato
*/
public class CalendarNameProviderImpl extends CalendarNameProvider implements AvailableLanguageTags {
private final LocaleProviderAdapter.Type type;
private final Set<String> langtags;
public CalendarNameProviderImpl(LocaleProviderAdapter.Type type, Set<String> langtags) {
this.type = type;
this.langtags = langtags;
}
@Override
public String getDisplayName(String calendarType, int field, int value, int style, Locale locale) {
String name = null;
String key = getResourceKey(calendarType, field, style);
if (key != null) {
String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key);
if (strings != null && strings.length > 0) {
if (field == DAY_OF_WEEK || field == YEAR) {
--value;
}
name = strings[value];
// If name is empty in standalone, try its `format' style.
if (name.length() == 0
&& (style == SHORT_STANDALONE || style == LONG_STANDALONE
|| style == NARROW_STANDALONE)) {
name = getDisplayName(calendarType, field, value,
getBaseStyle(style),
locale);
}
}
}
return name;
}
private static int[] REST_OF_STYLES = {
SHORT_STANDALONE, LONG_FORMAT, LONG_STANDALONE,
NARROW_FORMAT, NARROW_STANDALONE
};
@Override
public Map<String, Integer> getDisplayNames(String calendarType, int field, int style, Locale locale) {
Map<String, Integer> names;
if (style == ALL_STYLES) {
names = getDisplayNamesImpl(calendarType, field, SHORT_FORMAT, locale);
for (int st : REST_OF_STYLES) {
names.putAll(getDisplayNamesImpl(calendarType, field, st, locale));
}
} else {
// specific style
names = getDisplayNamesImpl(calendarType, field, style, locale);
}
return names.isEmpty() ? null : names;
}
private Map<String, Integer> getDisplayNamesImpl(String calendarType, int field,
int style, Locale locale) {
String key = getResourceKey(calendarType, field, style);
Map<String, Integer> map = new TreeMap<>(LengthBasedComparator.INSTANCE);
if (key != null) {
String[] strings = LocaleProviderAdapter.forType(type).getLocaleResources(locale).getCalendarNames(key);
if (strings != null) {
if (!hasDuplicates(strings)) {
if (field == YEAR) {
if (strings.length > 0) {
map.put(strings[0], 1);
}
} else {
int base = (field == DAY_OF_WEEK) ? 1 : 0;
for (int i = 0; i < strings.length; i++) {
String name = strings[i];
// Ignore any empty string (some standalone month names
// are not defined)
if (name.length() == 0) {
continue;
}
map.put(name, base + i);
}
}
}
}
}
return map;
}
private int getBaseStyle(int style) {
return style & ~(SHORT_STANDALONE - SHORT_FORMAT);
}
/**
* Comparator implementation for TreeMap which iterates keys from longest
* to shortest.
*/
private static class LengthBasedComparator implements Comparator<String> {
private static final LengthBasedComparator INSTANCE = new LengthBasedComparator();
private LengthBasedComparator() {
}
@Override
public int compare(String o1, String o2) {
int n = o2.length() - o1.length();
return (n == 0) ? o1.compareTo(o2) : n;
}
}
@Override
public Locale[] getAvailableLocales() {
return LocaleProviderAdapter.toLocaleArray(langtags);
}
@Override
public boolean isSupportedLocale(Locale locale) {
if (Locale.ROOT.equals(locale)) {
return true;
}
String calendarType = null;
if (locale.hasExtensions()) {
calendarType = locale.getUnicodeLocaleType("ca");
locale = locale.stripExtensions();
}
if (calendarType != null) {
switch (calendarType) {
case "buddhist":
case "japanese":
case "gregory":
break;
default:
// Unknown calendar type
return false;
}
}
if (langtags.contains(locale.toLanguageTag())) {
return true;
}
if (type == LocaleProviderAdapter.Type.JRE) {
String oldname = locale.toString().replace('_', '-');
return langtags.contains(oldname);
}
return false;
}
@Override
public Set<String> getAvailableLanguageTags() {
return langtags;
}
private boolean hasDuplicates(String[] strings) {
int len = strings.length;
for (int i = 0; i < len - 1; i++) {
String a = strings[i];
if (a != null) {
for (int j = i + 1; j < len; j++) {
if (a.equals(strings[j])) {
return true;
}
}
}
}
return false;
}
private String getResourceKey(String type, int field, int style) {
int baseStyle = getBaseStyle(style);
boolean isStandalone = (style != baseStyle);
if ("gregory".equals(type)) {
type = null;
}
boolean isNarrow = (baseStyle == NARROW_FORMAT);
StringBuilder key = new StringBuilder();
switch (field) {
case ERA:
if (type != null) {
key.append(type).append('.');
}
if (isNarrow) {
key.append("narrow.");
} else {
// JRE and CLDR use different resource key conventions
// due to historical reasons. (JRE DateFormatSymbols.getEras returns
// abbreviations while other getShort*() return abbreviations.)
if (this.type == LocaleProviderAdapter.Type.JRE) {
if (baseStyle == SHORT) {
key.append("short.");
}
} else { // CLDR
if (baseStyle == LONG) {
key.append("long.");
}
}
}
key.append("Eras");
break;
case YEAR:
if (!isNarrow) {
key.append(type).append(".FirstYear");
}
break;
case MONTH:
if (isStandalone) {
key.append("standalone.");
}
key.append("Month").append(toStyleName(baseStyle));
break;
case DAY_OF_WEEK:
// support standalone narrow day names
if (isStandalone && isNarrow) {
key.append("standalone.");
}
key.append("Day").append(toStyleName(baseStyle));
break;
case AM_PM:
if (isNarrow) {
key.append("narrow.");
}
key.append("AmPmMarkers");
break;
}
return key.length() > 0 ? key.toString() : null;
}
private String toStyleName(int baseStyle) {
switch (baseStyle) {
case SHORT:
return "Abbreviations";
case NARROW_FORMAT:
return "Narrows";
}
return "Names";
}
}