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<?php |
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/* |
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* This file is part of the xAPI package. |
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* |
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* (c) Christian Flothmann <[email protected]> |
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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 Xabbuh\XApi\Model; |
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use Xabbuh\XApi\Common\Exception\UnsupportedOperationException; |
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/** |
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* xAPI statement extensions. |
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* |
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* @author Christian Flothmann <[email protected]> |
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*/ |
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final class Extensions implements \ArrayAccess |
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{ |
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private $extensions; |
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public function __construct(\SplObjectStorage $extensions = null) |
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{ |
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$this->extensions = array(); |
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if (null !== $extensions) { |
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foreach ($extensions as $iri) { |
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if (!$iri instanceof IRI) { |
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($iri) ? get_class($iri) : gettype($iri))); |
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} |
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$this->extensions[$iri->getValue()] = $extensions[$iri]; |
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} |
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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 offsetExists($offset) |
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{ |
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if (!$offset instanceof IRI) { |
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($offset) ? get_class($offset) : gettype($offset))); |
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} |
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return isset($this->extensions[$offset->getValue()]); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetGet($offset) |
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{ |
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if (!$offset instanceof IRI) { |
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throw new \InvalidArgumentException(sprintf('Expected an IRI instance as key (got %s).', is_object($offset) ? get_class($offset) : gettype($offset))); |
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} |
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if (!isset($this->extensions[$offset->getValue()])) { |
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throw new \InvalidArgumentException(sprintf('No extension for key "%s" registered.', $offset->getValue())); |
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} |
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return $this->extensions[$offset->getValue()]; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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throw new UnsupportedOperationException('xAPI statement extensions are immutable.'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function offsetUnset($offset) |
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{ |
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throw new UnsupportedOperationException('xAPI statement extensions are immutable.'); |
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} |
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public function getExtensions() |
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{ |
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$extensions = new \SplObjectStorage(); |
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foreach ($this->extensions as $iri => $value) { |
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$extensions->attach(IRI::fromString($iri), $value); |
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} |
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return $extensions; |
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} |
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public function equals(Extensions $otherExtensions) |
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{ |
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if (count($this->extensions) !== count($otherExtensions->extensions)) { |
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return false; |
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} |
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foreach ($this->extensions as $iri => $value) { |
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if (!array_key_exists($iri, $otherExtensions->extensions)) { |
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return false; |
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} |
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if ($this->extensions[$iri] != $otherExtensions->extensions[$iri]) { |
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return false; |
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} |
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} |
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return true; |
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} |
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} |
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php-xapi /
model
