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<?php |
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namespace Phperf\Pipeline\Page; |
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use ArrayIterator; |
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use Iterator; |
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class PageIterator implements Iterator |
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{ |
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private $iterators; |
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/** |
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* @var Iterator |
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*/ |
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private $currentIterator; |
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function __construct(Iterator $iterators) |
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{ |
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$this->iterators = $iterators; |
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} |
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/** |
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* (PHP 5 >= 5.0.0)<br/> |
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* Return the current element |
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* @link http://php.net/manual/en/iterator.current.php |
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* @return mixed Can return any type. |
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*/ |
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public function current() |
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{ |
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return $this->currentIterator->current(); |
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} |
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/** |
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* (PHP 5 >= 5.0.0)<br/> |
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* Move forward to next element |
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* @link http://php.net/manual/en/iterator.next.php |
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* @return void Any returned value is ignored. |
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*/ |
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public function next() |
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{ |
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$this->currentIterator->next(); |
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} |
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/** |
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* (PHP 5 >= 5.0.0)<br/> |
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* Return the key of the current element |
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* @link http://php.net/manual/en/iterator.key.php |
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* @return mixed scalar on success, or null on failure. |
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*/ |
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public function key() |
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{ |
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//echo 'k'; |
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return $this->currentIterator->key(); |
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} |
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/** |
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* (PHP 5 >= 5.0.0)<br/> |
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* Checks if current position is valid |
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* @link http://php.net/manual/en/iterator.valid.php |
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* @return boolean The return value will be casted to boolean and then evaluated. |
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* Returns true on success or false on failure. |
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*/ |
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public function valid() |
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{ |
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$v = $this->currentIterator->valid(); |
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if (!$v) { |
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do { |
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$this->iterators->next(); |
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if ($this->iterators->valid()) { |
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$this->currentIterator = $this->iterators->current(); |
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$this->currentIterator->rewind(); |
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} |
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} while ($this->iterators->valid() && !$this->currentIterator->valid()); |
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if (!$this->currentIterator->valid()) { |
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return false; |
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} else { |
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return true; |
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} |
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} |
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return $v; |
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} |
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/** |
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* (PHP 5 >= 5.0.0)<br/> |
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* Rewind the Iterator to the first element |
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* @link http://php.net/manual/en/iterator.rewind.php |
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* @return void Any returned value is ignored. |
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*/ |
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public function rewind() |
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{ |
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$this->iterators->rewind(); |
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if (!$this->iterators->valid()) { |
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$this->currentIterator = new ArrayIterator(array()); |
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} else { |
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$this->currentIterator = $this->iterators->current(); |
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} |
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$this->currentIterator->rewind(); |
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} |
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} |
phperf /
pipeline
