/**
* Removes from the list the last element that was returned by next()
* @return void
* @throws IllegalStateException
*/
public function remove()
{
if ($this->canRemove) {
$this->list->removeAt($this->index);
$this->canRemove = false;
} else {
throw new IllegalStateException("Cannot remove element unless next has been called");
}
}
/**
* Outputs to stdout a simplistic representation of this node and
* it's children
* @param number $level
*/
public function toString($level = 0)
{
$output = "";
for ($i = 0; $i < $level; $i++) {
$output .= "\t";
}
$output .= print_r($this->value(), true);
$output .= "\n";
$iterator = $this->children->iterator();
while ($iterator->hasNext()) {
$output .= $iterator->next()->toString($level + 1);
}
return $output;
}
