/**
* Create an array of children in the leftRow,
* with the data returned from the right reader
* Where the ID fields Match
*
* @return array
* @throws ReaderException
*/
public function current()
{
$leftRow = $this->leftReader->current();
if (array_key_exists($this->nestKey, $leftRow)) {
throw new ReaderException(sprintf('Left Row: "%s" Reader already contains a field named "%s". Please choose a different nest key field', $this->key(), $this->nestKey));
}
$leftRow[$this->nestKey] = array();
$leftId = $this->getRowId($leftRow, $this->leftJoinField);
$rightRow = $this->rightReader->current();
$rightId = $this->getRowId($rightRow, $this->rightJoinField);
while ($leftId == $rightId && $this->rightReader->valid()) {
$leftRow[$this->nestKey][] = $rightRow;
$this->rightReader->next();
$rightRow = $this->rightReader->current();
if ($this->rightReader->valid()) {
$rightId = $this->getRowId($rightRow, $this->rightJoinField);
}
}
return $leftRow;
}
