protected function doFetch()
{
while ((list($innerKey, $innerValue) = $this->innerValuesIterator->fetch()) === null) {
if ((list($this->outerKey, $this->outerValue) = $this->outerIterator->fetch()) === null) {
return null;
}
$this->innerValuesIterator = $this->getInnerValuesIterator($this->outerKey, $this->outerValue);
$this->innerValuesIterator->rewind();
}
$projectionFunction = $this->projectionFunction;
return [$this->count++, $projectionFunction($this->outerValue, $innerValue, $this->outerKey, $innerKey)];
}
public function __construct(IIterator $values = null)
{
if ($values !== null) {
$values->rewind();
while ($element = $values->fetch()) {
$this->addRef($element[1]);
}
}
}
protected function doRewind()
{
$this->iterator->rewind();
}
