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<?php |
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namespace KGzocha\Searcher\Chain\Collection; |
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use KGzocha\Searcher\AbstractCollection; |
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use KGzocha\Searcher\Chain\CellInterface; |
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/** |
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* Collection of CellInterface objects. It will throw \InvalidArgumentException if tried to use it with less |
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* than MINIMUM_CELLS. |
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* |
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* @author Krzysztof Gzocha <[email protected]> |
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*/ |
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class CellCollection extends AbstractCollection implements CellCollectionInterface |
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{ |
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const MINIMUM_CELLS = 2; |
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/** |
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* @inheritDoc |
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*/ |
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protected function isItemValid($item) |
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{ |
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return $item instanceof CellInterface; |
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} |
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/** |
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* @return \ArrayIterator |
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*/ |
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public function getIterator() |
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{ |
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$this->validateNumberOfCells(); |
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return parent::getIterator(); |
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} |
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/** |
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* @return CellInterface[] |
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*/ |
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public function getCells() |
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{ |
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$this->validateNumberOfCells(); |
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return $this->getItems(); |
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} |
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/** |
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* @param string $name |
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* |
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* @return CellInterface|null |
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*/ |
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public function getNamedCell($name) |
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{ |
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return $this->getNamedItem($name); |
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} |
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/** |
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* @param CellInterface $item |
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* |
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* @return $this |
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*/ |
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public function addCell(CellInterface $item) |
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{ |
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return $this->addItem($item); |
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} |
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/** |
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* @param string $name |
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* @param CellInterface $cell |
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* |
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* @return $this |
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*/ |
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public function addNamedCell($name, CellInterface $cell) |
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{ |
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return $this->addNamedItem($name, $cell); |
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} |
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/** |
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* @throws \InvalidArgumentException |
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*/ |
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private function validateNumberOfCells() |
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{ |
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$count = $this->count(); |
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if (self::MINIMUM_CELLS <= $count) { |
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return; |
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} |
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throw new \InvalidArgumentException(sprintf( |
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'At last %d cells are required, but there are only %d in collection %s', |
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self::MINIMUM_CELLS, |
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$count, |
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get_class($this) |
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)); |
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} |
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} |
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krzysztof-gzocha /
searcher
