Code Coverage |
||||||||||
Lines |
Functions and Methods |
Classes and Traits |
||||||||
| Total | |
100.00% |
2 / 2 |
|
100.00% |
2 / 2 |
CRAP | |
100.00% |
1 / 1 |
| RepeatableIteratorIterator | |
100.00% |
2 / 2 |
|
100.00% |
2 / 2 |
2 | |
100.00% |
1 / 1 |
| __construct | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| count | |
100.00% |
1 / 1 |
|
100.00% |
1 / 1 |
1 | |||
| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of php-fast-forward/iterators. |
| 7 | * |
| 8 | * This source file is subject to the license that is bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 2025-2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 12 | * @license https://opensource.org/licenses/MIT MIT License |
| 13 | * |
| 14 | * @see https://github.com/php-fast-forward/iterators |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\Iterator; |
| 20 | |
| 21 | use LimitIterator; |
| 22 | use Countable; |
| 23 | use InfiniteIterator; |
| 24 | |
| 25 | /** |
| 26 | * An iterator that enables repeated iteration over a finite subset of an infinite iterator. |
| 27 | * |
| 28 | * This iterator wraps an `Iterator` and applies a `LimitIterator` over an `InfiniteIterator`, |
| 29 | * allowing a limited number of repeated iterations without modifying the underlying iterator. |
| 30 | * |
| 31 | * It also implements `Countable` to return the number of elements available in the limited iteration. |
| 32 | * |
| 33 | * ## Usage Example: |
| 34 | * |
| 35 | * @example Limiting an Infinite Iterator |
| 36 | * ```php |
| 37 | * use FastForward\Iterator\RepeatableIteratorIterator; |
| 38 | * use ArrayIterator; |
| 39 | * |
| 40 | * $data = new ArrayIterator([1, 2, 3, 4, 5]); |
| 41 | * $repeatableIterator = new RepeatableIteratorIterator($data, 3); |
| 42 | * |
| 43 | * echo count($repeatableIterator); // Outputs: 3 |
| 44 | * |
| 45 | * foreach ($repeatableIterator as $value) { |
| 46 | * echo $value . ' '; // Outputs: 1 2 3 |
| 47 | * } |
| 48 | * ``` |
| 49 | * |
| 50 | * **Note:** The iterator **does not consume** values permanently, |
| 51 | * as it is backed by an `InfiniteIterator` and `LimitIterator`. |
| 52 | * |
| 53 | * @since 1.0.0 |
| 54 | */ |
| 55 | class RepeatableIteratorIterator extends LimitIterator implements Countable |
| 56 | { |
| 57 | /** |
| 58 | * Initializes the RepeatableIteratorIterator. |
| 59 | * |
| 60 | * @param iterable $iterator the iterator to be wrapped in an infinite loop |
| 61 | * @param int $limit the maximum number of elements to iterate over per cycle |
| 62 | * @param int $offset the starting offset within the iterator |
| 63 | */ |
| 64 | public function __construct( |
| 65 | iterable $iterator, |
| 66 | private int $limit, |
| 67 | int $offset = 0 |
| 68 | ) { |
| 69 | parent::__construct(new InfiniteIterator(new IterableIterator($iterator)), $offset, $this->limit); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * Returns the number of elements that can be iterated per cycle. |
| 74 | * |
| 75 | * @return int the count of items in the limited iteration |
| 76 | */ |
| 77 | public function count(): int |
| 78 | { |
| 79 | return $this->limit; |
| 80 | } |
| 81 | } |