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<?php |
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namespace Wikibase\InternalSerialization\Deserializers; |
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use Deserializers\Deserializer; |
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use Deserializers\DispatchableDeserializer; |
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use Deserializers\Exceptions\DeserializationException; |
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use Deserializers\Exceptions\MissingAttributeException; |
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use InvalidArgumentException; |
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use Wikibase\DataModel\Reference; |
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use Wikibase\DataModel\ReferenceList; |
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use Wikibase\DataModel\Statement\Statement; |
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/** |
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* @licence GNU GPL v2+ |
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* @author Katie Filbert < [email protected] > |
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* @author Jeroen De Dauw < [email protected] > |
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* @author Bene* < [email protected] > |
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*/ |
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class LegacyStatementDeserializer implements DispatchableDeserializer { |
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/** |
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* @var Deserializer |
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*/ |
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private $snakDeserializer; |
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/** |
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* @var Deserializer |
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*/ |
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private $snakListDeserializer; |
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public function __construct( Deserializer $snakDeserializer, Deserializer $snakListDeserializer ) { |
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$this->snakDeserializer = $snakDeserializer; |
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$this->snakListDeserializer = $snakListDeserializer; |
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} |
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/** |
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* @param array $serialization |
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* |
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* @return Statement |
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* @throws DeserializationException |
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*/ |
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public function deserialize( $serialization ) { |
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if ( !is_array( $serialization ) ) { |
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throw new DeserializationException( 'Statement serialization must be an array' ); |
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} |
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$this->assertHasKey( $serialization, 'm', 'Mainsnak serialization is missing' ); |
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$this->assertHasKey( $serialization, 'q', 'Qualifiers serialization is missing' ); |
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$this->assertHasKey( $serialization, 'g', 'Guid is missing in serialization' ); |
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$this->assertHasKey( $serialization, 'rank', 'Rank is missing in serialization' ); |
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$this->assertHasKey( $serialization, 'refs', 'Refs are missing in serialization' ); |
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return $this->newStatement( $serialization ); |
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} |
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private function assertHasKey( array $serialization, $key, $message ) { |
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if ( !array_key_exists( $key, $serialization ) ) { |
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throw new MissingAttributeException( $key, $message ); |
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} |
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} |
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private function newStatement( array $serialization ) { |
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$statement = new Statement( |
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$this->snakDeserializer->deserialize( $serialization['m'] ), |
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$this->snakListDeserializer->deserialize( $serialization['q'] ), |
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$this->getReferences( $serialization['refs'] ) |
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); |
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try { |
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$statement->setRank( $serialization['rank'] ); |
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$statement->setGuid( $serialization['g'] ); |
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} catch ( InvalidArgumentException $ex ) { |
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throw new DeserializationException( $ex->getMessage(), $ex ); |
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} |
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return $statement; |
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} |
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private function getReferences( array $refs ) { |
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$references = array(); |
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foreach ( $refs as $serialization ) { |
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$references[] = new Reference( $this->snakListDeserializer->deserialize( $serialization ) ); |
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} |
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return new ReferenceList( $references ); |
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} |
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/** |
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* @see DispatchableDeserializer::isDeserializerFor |
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* |
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* @since 2.2 |
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* |
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* @param mixed $serialization |
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* |
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* @return bool |
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*/ |
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public function isDeserializerFor( $serialization ) { |
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return is_array( $serialization ) |
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// This element is called 'mainsnak' in the current serialization. |
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&& array_key_exists( 'm', $serialization ); |
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} |
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} |
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