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<?php |
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namespace Asparagus; |
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use InvalidArgumentException; |
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use RangeException; |
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use RuntimeException; |
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/** |
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* Allows the execution of a query to a remote SPARQL endpoint. |
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* |
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* @since 0.1 |
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* |
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* @license GNU GPL v2+ |
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* @author Bene* < [email protected] > |
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*/ |
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class QueryExecuter { |
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/** |
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* @var string |
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*/ |
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private $url; |
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/** |
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* @var string[] |
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*/ |
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private $options; |
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/** |
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* @var Http |
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*/ |
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private $http; |
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/** |
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* @param string $url |
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* @param string[] $options one of queryParam, formatParam or userAgent |
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* @param Http|null $http |
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*/ |
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public function __construct( $url, array $options = array(), Http $http = null ) { |
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$this->url = $url; |
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$this->options = array_merge( array( |
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'queryParam' => 'query', |
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'formatParam' => 'format', |
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'userAgent' => 'Asparagus/Asparagus 0.1' |
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), $options ); |
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$this->http = $http ?: new Http( $this->options['userAgent'] ); |
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} |
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/** |
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* Executes the given SPARQL query. |
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* |
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* @param string|QueryBuilder $query |
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* @return array |
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* @throws InvalidArgumentException |
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* @throws RangeException |
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* @throws RuntimeException |
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*/ |
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public function execute( $query ) { |
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if ( $query instanceof QueryBuilder ) { |
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$query = $query->getSPARQL(); |
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} |
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if ( !is_string( $query ) ) { |
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throw new InvalidArgumentException( '$query has to be a string or an instance of QueryBuilder' ); |
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} |
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$result = $this->getResult( $query ); |
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// TODO also support ask queries (with key 'boolean') |
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// https://www.w3.org/TR/rdf-sparql-json-res/ |
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return $result['results']; |
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} |
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private function getResult( $query ) { |
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$result = $this->http->request( $this->url, array( |
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$this->options['queryParam'] => $query, |
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$this->options['formatParam'] => 'json' |
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) ); |
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return json_decode( $result, true ); |
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} |
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} |
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Benestar /
asparagus
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..