/**
* Evaluates the condition and returns its result, this controls
* whether or not more results will be yielded.
*
* @return bool
*/
public function valid()
{
if (!parent::valid()) {
return false;
}
$current = $this->current();
$key = $this->key();
$condition = $this->_condition;
return !$condition($current, $key, $this->_innerIterator);
}
/**
* Returns whether or not the iterator has more elements
*
* @return bool
*/
public function valid()
{
if ($this->_buffer->offsetExists($this->_index)) {
$current = $this->_buffer->offsetGet($this->_index);
$this->_current = $current['value'];
$this->_key = $current['key'];
return true;
}
$valid = parent::valid();
if ($valid) {
$this->_current = parent::current();
$this->_key = parent::key();
$this->_buffer->push(['key' => $this->_key, 'value' => $this->_current]);
}
$this->_finished = !$valid;
return $valid;
}
/**
* Resets the collection pointer.
*
* @return void
*/
public function rewind()
{
parent::rewind();
$this->_values->rewind();
$this->_validValues = $this->_values->valid();
}
