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| /vendor/fusonic/linq/src/Fusonic/Linq/Iterator/GroupIterator.php |
|---|
| @@ -0,0 +1,74 @@ |
| <?php |
| /* |
| * This file is part of Fusonic-linq. |
| * https://github.com/fusonic/fusonic-linq |
| * |
| * (c) Fusonic GmbH |
| * |
| * For the full copyright and license information, please view the LICENSE |
| * file that was distributed with this source code. |
| */ |
| namespace Fusonic\Linq\Iterator; |
| use Iterator; |
| use ArrayIterator; |
| use Fusonic\Linq\GroupedLinq; |
| class GroupIterator implements Iterator |
| { |
| private $iterator; |
| private $grouped; |
| private $keySelector; |
| public function __construct($iterator, $keySelector) |
| { |
| $this->iterator = $iterator; |
| $this->keySelector = $keySelector; |
| } |
| public function current() |
| { |
| $current = $this->grouped->current(); |
| return new GroupedLinq($current['key'], new \ArrayIterator($current['values'])); |
| } |
| public function next() |
| { |
| $this->grouped->next(); |
| } |
| public function key() |
| { |
| return $this->grouped->key(); |
| } |
| public function valid() |
| { |
| return $this->grouped->valid(); |
| } |
| public function rewind() |
| { |
| if ($this->grouped === null) { |
| $this->doGroup(); |
| } |
| $this->grouped->rewind(); |
| } |
| private function doGroup() |
| { |
| $keySelector = $this->keySelector; |
| $this->grouped = new \ArrayIterator(array()); |
| foreach ($this->iterator as $value) { |
| $key = $keySelector($value); |
| if (!isset($this->grouped[$key])) { |
| $this->grouped[$key] = array('key' => $key, 'values'=> array()); |
| } |
| $this->grouped[$key]['values'][] = $value; |
| } |
| } |
| } |