use of com.ibm.icu.text.DateTimePatternGenerator in project es6draft by anba.
the class DateTimeFormatConstructor method BasicFormatMatcher.
/**
* 12.1.3 BasicFormatMatcher (options, formats)
*
* @param formatRecord
* the format matcher record
* @param dataLocale
* the locale
* @return the basic format matcher
*/
public static String BasicFormatMatcher(FormatMatcherRecord formatRecord, String dataLocale) {
ULocale locale = ULocale.forLanguageTag(dataLocale);
DateTimePatternGenerator generator = DateTimePatternGenerator.getInstance(locale);
// ICU4J only provides access to date- or time-only skeletons, with the exception of the
// weekday property, which may also appear in time-only skeletons or as a single skeleton
// property. That means we need to handle four different cases:
// 1) formatRecord contains only date properties
// 2) formatRecord contains only time properties
// 3) formatRecord contains date and time properties
// 4) formatRecord contains only the weekday property
boolean optDate = formatRecord.isDate();
boolean optTime = formatRecord.isTime();
boolean optDateTime = optDate && optTime;
// get the preferred hour representation (12-hour-cycle or 24-hour-cycle)
boolean optHour12 = formatRecord.isHour12(locale);
// handle date and time patterns separately
int bestDateScore = Integer.MIN_VALUE, bestTimeScore = Integer.MIN_VALUE;
String bestDateFormat = null, bestTimeFormat = null;
Map<String, String> skeletons = addCanonicalSkeletons(generator.getSkeletons(null));
for (Map.Entry<String, String> entry : skeletons.entrySet()) {
Skeleton skeleton = new Skeleton(entry.getKey());
// getSkeletons() does not return any date+time skeletons
assert !(skeleton.isDate() && skeleton.isTime());
// skip skeleton if it contains unsupported fields
if (skeleton.has(DateField.Quarter) || skeleton.has(DateField.Week)) {
continue;
}
if (skeleton.has(DateField.Year) && skeleton.getSymbol(DateField.Year) != 'y') {
continue;
}
if (skeleton.has(DateField.Day) && skeleton.getSymbol(DateField.Day) != 'd') {
continue;
}
if (skeleton.has(DateField.Second) && skeleton.getSymbol(DateField.Second) != 's') {
continue;
}
if (optDateTime) {
// the date-skeleton part
if (skeleton.isTime() && skeleton.has(DateField.Weekday)) {
continue;
}
// skip time-skeleton if hour representation does not match requested value
if (skeleton.isTime() && skeleton.isHour12() != optHour12) {
continue;
}
if (skeleton.isDate()) {
int score = computeScore(formatRecord, skeleton);
if (score > bestDateScore) {
bestDateScore = score;
bestDateFormat = entry.getValue();
}
} else {
int score = computeScore(formatRecord, skeleton);
if (score > bestTimeScore) {
bestTimeScore = score;
bestTimeFormat = entry.getValue();
}
}
} else if (optDate) {
// skip time-skeletons if only date fields were requested
if (skeleton.isTime()) {
continue;
}
int score = computeScore(formatRecord, skeleton);
if (score > bestDateScore) {
bestDateScore = score;
bestDateFormat = entry.getValue();
}
} else if (optTime) {
// skip date-skeletons if only time fields were requested
if (skeleton.isDate()) {
continue;
}
// skip time-skeleton if hour representation does not match requested value
if (skeleton.isHour12() != optHour12) {
continue;
}
int score = computeScore(formatRecord, skeleton);
if (score > bestTimeScore) {
bestTimeScore = score;
bestTimeFormat = entry.getValue();
}
} else {
// weekday-only case
int score = computeScore(formatRecord, skeleton);
if (score > bestDateScore) {
bestDateScore = score;
bestDateFormat = entry.getValue();
}
}
}
assert !optDate || bestDateFormat != null;
assert !optTime || bestTimeFormat != null;
assert !(!optDate && !optTime) || bestDateFormat != null;
if (optDateTime) {
String dateTimeFormat = generator.getDateTimeFormat();
return MessageFormat.format(dateTimeFormat, bestTimeFormat, bestDateFormat);
}
if (optTime) {
return bestTimeFormat;
}
return bestDateFormat;
}
use of com.ibm.icu.text.DateTimePatternGenerator in project es6draft by anba.
the class DateTimeFormatConstructor method BestFitFormatMatcher.
/**
* 12.1.4 BestFitFormatMatcher (options, formats)
*
* @param formatRecord
* the format matcher record
* @param dataLocale
* the locale
* @return the best applicable pattern
*/
public static String BestFitFormatMatcher(FormatMatcherRecord formatRecord, String dataLocale) {
// Let ICU4J compute the best applicable pattern for the requested input values
ULocale locale = ULocale.forLanguageTag(dataLocale);
DateTimePatternGenerator generator = DateTimePatternGenerator.getInstance(locale);
return generator.getBestPattern(formatRecord.toSkeleton());
}
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