/**
* Check if there is a current element after calls to rewind() or next().
* Used to check if we've iterated to the end of the collection
*
* @return boolean FALSE if there's nothing more to iterate over
*/
public function valid()
{
if ($this->Handle) {
return $this->Handle->valid();
}
return false;
}
/**
* Method for SeekableIterator interface. Takes a posiiton and traverses the file to that position
* The value can be retrieved with a `current()` call afterwards.
*
* @param int Position in file
*/
public function seek($Position)
{
if (!$this->Handle) {
throw new OutOfBoundsException('SpreadsheetReader: No file opened');
}
$CurrentIndex = $this->Handle->key();
if ($CurrentIndex != $Position) {
if ($Position < $CurrentIndex || is_null($CurrentIndex) || $Position == 0) {
$this->rewind();
}
while ($this->Handle->valid() && $Position > $this->Handle->key()) {
$this->Handle->next();
}
if (!$this->Handle->valid()) {
throw new OutOfBoundsException('SpreadsheetError: Position ' . $Position . ' not found');
}
}
return null;
}
