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<?php |
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namespace Smoren\GraphTools\Structs; |
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use Smoren\GraphTools\Models\Interfaces\EdgeInterface; |
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use Smoren\GraphTools\Models\Interfaces\VertexInterface; |
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use Smoren\GraphTools\Structs\Interfaces\TraverseStepIteratorInterface; |
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/** |
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* Class EdgeVertexIterator |
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* @author Smoren <[email protected]> |
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*/ |
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class TraverseStepIterator implements TraverseStepIteratorInterface |
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{ |
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/** |
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* @var array<TraverseStepItem> source to iterate |
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*/ |
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protected array $source; |
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/** |
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* @var int iteration pointer |
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*/ |
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protected int $index = 0; |
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/** |
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* @inheritDoc |
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*/ |
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public static function combine(TraverseStepIteratorInterface ...$iterators): TraverseStepIteratorInterface |
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{ |
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$source = []; |
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foreach($iterators as $iterator) { |
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foreach($iterator as $edge => $vertex) { |
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$source[] = new TraverseStepItem($edge, $vertex); |
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} |
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} |
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return new TraverseStepIterator($source); |
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} |
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/** |
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* EdgeVertexIterator constructor. |
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* @param array<TraverseStepItem> $source |
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*/ |
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public function __construct(array $source) |
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{ |
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$this->source = $source; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function current(): VertexInterface |
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{ |
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return $this->source[$this->index]->getVertex(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function next(): void |
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{ |
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$this->index++; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function key(): ?EdgeInterface |
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{ |
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return $this->source[$this->index]->getEdge(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function valid(): bool |
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{ |
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return $this->index < $this->count(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function rewind(): void |
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{ |
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$this->index = 0; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function count(): int |
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{ |
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return count($this->source); |
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} |
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} |
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Smoren /
graph-tools-php
