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<?php |
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namespace Wikibase\DataModel\Snak; |
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use InvalidArgumentException; |
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use Wikibase\DataModel\Entity\EntityId; |
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use Wikibase\DataModel\Entity\Property; |
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use Wikibase\DataModel\Entity\PropertyId; |
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/** |
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* Base class for snaks. |
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* See https://www.mediawiki.org/wiki/Wikibase/DataModel#Snaks |
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* |
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* @since 0.1 |
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* |
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* @license GPL-2.0+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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abstract class SnakObject implements Snak { |
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/** |
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* @since 0.1 |
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* |
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* @var PropertyId |
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*/ |
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protected $propertyId; |
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/** |
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* Support for passing in an EntityId instance that is not a PropertyId instance has |
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* been deprecated since 0.5. |
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* |
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* @since 0.1 |
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* |
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* @param PropertyId|EntityId|int $propertyId |
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* |
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* @throws InvalidArgumentException |
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*/ |
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public function __construct( $propertyId ) { |
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if ( is_int( $propertyId ) ) { |
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$propertyId = PropertyId::newFromNumber( $propertyId ); |
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} |
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if ( !( $propertyId instanceof EntityId ) ) { |
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throw new InvalidArgumentException( '$propertyId must be an instance of EntityId' ); |
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} |
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if ( $propertyId->getEntityType() !== Property::ENTITY_TYPE ) { |
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throw new InvalidArgumentException( '$propertyId must have an entityType of ' . Property::ENTITY_TYPE ); |
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} |
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if ( !( $propertyId instanceof PropertyId ) ) { |
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$propertyId = new PropertyId( $propertyId->getSerialization() ); |
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} |
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$this->propertyId = $propertyId; |
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} |
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/** |
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* @see PropertyIdProvider::getPropertyId |
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* |
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* @since 0.1 |
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* |
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* @return PropertyId |
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*/ |
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public function getPropertyId() { |
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return $this->propertyId; |
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} |
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/** |
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* @see Hashable::getHash |
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* |
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* @return string |
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*/ |
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public function getHash() { |
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return sha1( serialize( $this ) ); |
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} |
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/** |
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* @see Comparable::equals |
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* |
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* @since 0.3 |
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* |
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* @param mixed $target |
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* |
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* @return bool |
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*/ |
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public function equals( $target ) { |
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if ( $this === $target ) { |
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return true; |
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} |
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return is_object( $target ) |
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&& get_called_class() === get_class( $target ) |
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&& $this->getHash() === $target->getHash(); |
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} |
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/** |
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* @see Serializable::serialize |
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* |
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* @since 0.1 |
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* |
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* @return string |
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*/ |
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public function serialize() { |
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return $this->propertyId->getSerialization(); |
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} |
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/** |
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* @see Serializable::unserialize |
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* |
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* @since 0.1 |
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* |
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* @param string $serialized |
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*/ |
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public function unserialize( $serialized ) { |
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$this->propertyId = self::newPropertyId( $serialized ); |
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} |
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/** |
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* @param string $serialized |
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* |
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* @return PropertyId |
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*/ |
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protected static function newPropertyId( $serialized ) { |
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if ( is_int( $serialized ) ) { |
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// numeric id, already unserialized |
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return PropertyId::newFromNumber( $serialized ); |
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} |
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try { |
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// full ID, as a string, not serialized |
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return new PropertyId( $serialized ); |
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} catch ( InvalidArgumentException $ex ) { |
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// noop |
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} |
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$unserialized = unserialize( $serialized ); |
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if ( is_int( $unserialized ) ) { |
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// numeric id, not previously unserialized |
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return PropertyId::newFromNumber( $unserialized ); |
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} else { |
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throw new InvalidArgumentException( 'unexpected property ID serialization' ); |
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} |
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} |
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} |
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wmde /
WikibaseDataModel
