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<?php |
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/** |
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* This file is part of the Cubiche package. |
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* |
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* Copyright (c) Cubiche |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Cubiche\Core\Collections\LazyCollection; |
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use Cubiche\Core\Collections\CollectionInterface; |
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use Cubiche\Core\Comparable\ComparatorInterface; |
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use Cubiche\Core\Specification\SpecificationInterface; |
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/** |
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* Lazy Collection. |
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* |
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* @author Ivannis Suárez Jerez <[email protected]> |
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* @author Karel Osorio Ramírez <[email protected]> |
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*/ |
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abstract class LazyCollection implements CollectionInterface |
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{ |
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/** |
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* @var CollectionInterface |
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*/ |
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protected $collection; |
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/** |
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* @var bool |
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*/ |
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protected $initialized = false; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function clear() |
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{ |
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$this->lazyInitialize(); |
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$this->collection()->clear(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isEmpty() |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->isEmpty(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toArray() |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->toArray(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getIterator() |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->getIterator(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count() |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->count(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function slice($offset, $length = null) |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->slice($offset, $length); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function find(SpecificationInterface $criteria) |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->find($criteria); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function sorted(ComparatorInterface $criteria) |
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{ |
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$this->lazyInitialize(); |
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return $this->collection()->sorted($criteria); |
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} |
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/** |
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* Lazy initialize. |
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*/ |
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protected function lazyInitialize() |
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{ |
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if (!$this->isInitialized()) { |
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$this->initialize(); |
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$this->initialized = true; |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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protected function isInitialized() |
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{ |
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return $this->initialized; |
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} |
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/** |
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* Initialize the collection. |
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*/ |
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abstract protected function initialize(); |
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/** |
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* @return CollectionInterface |
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*/ |
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protected function collection() |
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{ |
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return $this->collection; |
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} |
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} |
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cubiche /
collections
