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<?php |
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namespace WikidataQueryApi\Query\Serializers; |
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use Serializers\DispatchableSerializer; |
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use Serializers\Exceptions\UnsupportedObjectException; |
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use Serializers\Serializer; |
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use WikidataQueryApi\Query\AbstractQuery; |
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use WikidataQueryApi\Query\CollectionQuery; |
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/** |
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* @licence GPLv2+ |
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* @author Thomas Pellissier Tanon |
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*/ |
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class QuerySerializer implements DispatchableSerializer { |
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/** |
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* @var Serializer |
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*/ |
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private $commandsSerializer; |
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/** |
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* @param Serializer $commandsSerializer |
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*/ |
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public function __construct( Serializer $commandsSerializer ) { |
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$this->commandsSerializer = $commandsSerializer; |
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} |
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/** |
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* @see DispatchableSerializer::isSerializerFor |
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*/ |
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public function isSerializerFor( $object ) { |
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return is_object( $object ) && $object instanceof AbstractQuery; |
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} |
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/** |
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* @see Serializer::serialize |
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*/ |
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public function serialize( $object ) { |
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if ( !$this->isSerializerFor( $object ) ) { |
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throw new UnsupportedObjectException( |
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$object, |
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'QuerySerializer can only serialize AbstractQuery objects' |
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); |
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} |
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return $this->getSerialized( $object ); |
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} |
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private function getSerialized( AbstractQuery $query ) { |
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if ( $query instanceof CollectionQuery ) { |
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return '(' . implode( ' ' . $query->getType() . ' ', $this->serializeQueries( $query->getSubQueries() ) ) . ')'; |
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} |
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return $this->commandsSerializer->serialize( $query ); |
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} |
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private function serializeQueries( array $queries ) { |
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$serialized = []; |
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foreach( $queries as $query ) { |
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$serialized[] = $this->getSerialized( $query ); |
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} |
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return $serialized; |
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} |
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} |
ProjetPP /
WikidataQueryApi
