protected function fetch()
{
$v0 = $this->it0->current();
$v1 = $this->it1->current();
$k0 = $this->it0->key();
$k1 = $this->it1->key();
$this->v = $this->valueJoinSelector->select($v0, $v1, $k0, $k1);
$this->k = $this->keyJoinSelector->select($v0, $v1, $k0, $k1);
}
protected function fetchInner()
{
if ($this->valid()) {
$innerV = $this->inner->current();
$innerK = $this->inner->key();
$this->v = $this->valueJoinSelector->select($this->outerV, $innerV, $this->outerK, $innerK);
$this->k = $this->keyJoinSelector->select($this->outerV, $innerV, $this->outerK, $innerK);
}
}
protected function fetchIfValid()
{
if ($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();
}
}