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<?php |
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namespace Jkphl\Micrometa\Ports\Item; |
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use Jkphl\Micrometa\Ports\Exceptions\InvalidArgumentException; |
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use Jkphl\Micrometa\Ports\Exceptions\OutOfBoundsException; |
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/** |
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* Abstract getter functionality that is applicable for implementations of ItemCollectionFacade. |
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* |
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* The implementation remains responsible for implementing the collection methods itself. |
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* |
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* Thereby is usable by both the Item for it's properties, as for an ItemList with it's items. |
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* |
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* @package Jkphl\Micrometa |
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* @subpackage Jkphl\Micrometa\Ports |
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*/ |
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abstract class Collection implements CollectionFacade |
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{ |
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/** |
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* Generic item getter |
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* |
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* @param string $type Item type |
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* @param array $arguments Arguments |
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* |
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* @return ItemInterface Item |
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* @throws InvalidArgumentException If the item index is invalid |
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* @api |
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*/ |
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public function __call($type, $arguments) |
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{ |
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$index = 0; |
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if (count($arguments)) { |
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// If the item index is invalid |
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if (!is_int($arguments[0]) || ($arguments[0] < 0)) { |
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throw new InvalidArgumentException( |
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sprintf(InvalidArgumentException::INVALID_ITEM_INDEX_STR, $arguments[0]), |
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InvalidArgumentException::INVALID_ITEM_INDEX |
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); |
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} |
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$index = $arguments[0]; |
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} |
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// Return the item by type and index |
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return $this->getItemByTypeAndIndex($type, $index); |
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} |
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/** |
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* Return an item by type and index |
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* |
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* @param string $type Item type |
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* @param int $index Item index |
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* |
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* @return ItemInterface Item |
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* @throws OutOfBoundsException If the item index is out of bounds |
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*/ |
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private function getItemByTypeAndIndex($type, $index) |
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{ |
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$typeItems = $this->getItems($type); |
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// If the item index is out of bounds |
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if (count($typeItems) <= $index) { |
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throw new OutOfBoundsException( |
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sprintf(OutOfBoundsException::INVALID_ITEM_INDEX_STR, $index), |
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OutOfBoundsException::INVALID_ITEM_INDEX |
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); |
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} |
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return $typeItems[$index]; |
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} |
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} |
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