protected function getTree(DateTimeParseContext $context)
{
// prepare parse tree
$regionIds = ZoneRulesProvider::getAvailableZoneIds();
$regionIdsSize = count($regionIds);
$cached = $context->isCaseSensitive() ? self::$cachedPrefixTree : self::$cachedPrefixTreeCI;
if ($cached == null || $cached->getKey() != $regionIdsSize) {
$cached = $context->isCaseSensitive() ? self::$cachedPrefixTree : self::$cachedPrefixTreeCI;
if ($cached == null || $cached->getKey() != $regionIdsSize) {
$cached = new SimpleImmutableEntry($regionIdsSize, PrefixTree::newTree($regionIds, $context));
if ($context->isCaseSensitive()) {
self::$cachedPrefixTree = $cached;
} else {
self::$cachedPrefixTreeCI = $cached;
}
}
}
return $cached->getValue();
}
protected function getTree(DateTimeParseContext $context)
{
if ($this->textStyle == TextStyle::NARROW()) {
return parent::getTree($context);
}
$locale = $context->getLocale();
$isCaseSensitive = $context->isCaseSensitive();
$regionIds = ZoneRulesProvider::getAvailableZoneIds();
$regionIdsSize = $regionIds->size();
$cached = $isCaseSensitive ? self::$cachedTree : self::$cachedTreeCI;
$entry = null;
$tree = null;
$zoneStrings = null;
if (($entry = $cached->get($locale)) == null || ($entry->getKey() != $regionIdsSize || ($tree = $entry->getValue()->get()) == null)) {
$tree = PrefixTree::newTree($context);
$zoneStrings = TimeZoneNameUtility::getZoneStrings($locale);
foreach ($zoneStrings as $names) {
$zid = $names[0];
if (!$regionIds->contains($zid)) {
continue;
}
$tree->add($zid, $zid);
// don't convert zid -> metazone
$zid = ZoneName::toZid($zid, $locale);
$i = $this->textStyle == TextStyle::FULL() ? 1 : 2;
for (; $i < count($names); $i += 2) {
$tree->add($names[$i], $zid);
}
}
// if we have a set of preferred zones, need a copy and
// add the preferred zones again to overwrite
if (self::$preferredZones != null) {
foreach ($zoneStrings as $names) {
$zid = $names[0];
if (!self::$preferredZones->contains($zid) || !$regionIds->contains($zid)) {
continue;
}
$i = $this->textStyle == TextStyle::FULL() ? 1 : 2;
for (; $i < count($names); $i += 2) {
$tree->add($names[$i], $zid);
}
}
}
$cached->put($locale, new SimpleImmutableEntry($regionIdsSize, $tree));
}
return $tree;
}
