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<?php |
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/** |
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* BaconPdf |
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* |
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* @link http://github.com/Bacon/BaconPdf For the canonical source repository |
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* @copyright 2015 Ben 'DASPRiD' Scholzen |
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* @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License |
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*/ |
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namespace Bacon\Pdf\Object; |
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use Bacon\Pdf\Exception\DomainException; |
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use Bacon\Pdf\Exception\OutOfBoundsException; |
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use Countable; |
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use IteratorAggregate; |
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use SplObjectStorage; |
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/** |
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* Storage for mapping indirect objects to concrete objects. |
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*/ |
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final class ObjectStorage implements IteratorAggregate, Countable |
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{ |
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/** |
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* @var ObjectInterface[] |
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*/ |
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private $objects = []; |
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/** |
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* @var SplObjectStorage|IndirectObject[] |
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*/ |
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private $indirectObjects = []; |
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/** |
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* @var int |
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*/ |
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private $objectCount = 0; |
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public function __construct() |
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{ |
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$this->indirectObjects = new SplObjectStorage(); |
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} |
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/** |
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* Adds an object to the storage. |
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* |
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* @param ObjectInterface $object |
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* @return IndirectObject |
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*/ |
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public function addObject(ObjectInterface $object) |
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{ |
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$id = ++$this->objectCount; |
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$this->objects[$id] = $object; |
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$this->indirectObjects[$object] = new IndirectObject($id, 0, $this); |
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} |
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/** |
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* @return int |
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*/ |
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public function reserveSlot() |
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{ |
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$id = ++$this->objectCount; |
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$this->objects[$id] = null; |
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return $id; |
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} |
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/** |
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* @param IndirectObject $indirectObject |
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* @throws DomainException |
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*/ |
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public function fillSlot(IndirectObject $indirectObject) |
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{ |
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if ($indirectObject->getObjectStorage() !== $this) { |
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throw new DomainException('Object storage of indirect object must equal this object storage'); |
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} |
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$id = $indirectObject->getId(); |
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if (!isset($this->objects[$id])) { |
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throw new DomainException(sprintf('No reserved slot for id %d found', $id)); |
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} |
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$this->objects[$id] = $indirectObject; |
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} |
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/** |
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* @param IndirectObject $indirectObject |
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* @return ObjectInterface |
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*/ |
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public function getObject(IndirectObject $indirectObject) |
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{ |
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if ($indirectObject->getObjectStorage() !== $this) { |
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throw new DomainException('Object storage of indirect object must equal this object storage'); |
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} |
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return $this->objects[$indirectObject->getId()]; |
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} |
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/** |
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* @param ObjectInterface $object |
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* @return IndirectObject |
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* @throws OutOfBoundsException |
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*/ |
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public function getIndirectObject(ObjectInterface $object) |
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{ |
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if (!$this->indirectObjects->contains($object)) { |
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throw new OutOfBoundsException('Object is not registered in the storage'); |
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} |
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return $this->indirectObjects[$object]; |
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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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foreach ($this->objects as $id => $object) { |
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if (null === $object) { |
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throw new DomainException(sprintf('Object slot for id %d was reserved but not filled', $id)); |
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} |
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yield $id => $object; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count($mode = 'COUNT_NORMAL') |
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{ |
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return $this->objectCount; |
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} |
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} |
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Bacon /
BaconPdf
