protected function fetchIfValid()
{
if ($this->outer->valid()) {
$outerV = $this->outer->current();
$outerK = $this->outer->key();
$compareKey = $this->outerCompareKeySelector->select($outerV, $outerK);
$inners = $this->lookup->get($compareKey);
$inners = new GroupingGinq(IteratorUtil::iterator($inners), $compareKey);
$this->v = $this->resultValueSelector->select($outerV, $inners, $outerK, $compareKey);
$this->k = $this->outer->key();
}
}
/**
* @param callable|array|string $lookupKeySelector (v, k) -> v
* @param callable|array|string|null $elementSelector (v, k) -> v
* @param EqualityComparer|null $eqComparer
* @return LookupGinq
*/
public function toLookup($lookupKeySelector, $elementSelector = null, $eqComparer = null)
{
$lookupKeySelector = SelectorResolver::resolve($lookupKeySelector, ValueSelector::getInstance());
$elementSelector = SelectorResolver::resolve($elementSelector, ValueSelector::getInstance());
$lookup = new LookupGinq(EqualityComparerResolver::resolve($eqComparer, EqualityComparer::getDefault()));
$it = $this->getIterator();
foreach ($it as $k => $v) {
$lookup->put($lookupKeySelector->select($v, $k), $elementSelector->select($v, $k));
}
return $lookup;
}
