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<?php |
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/** |
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* PHPOAIPMH Library |
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* |
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* @license http://opensource.org/licenses/MIT |
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* @link https://github.com/caseyamcl/phpoaipmh |
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* @version 2.0 |
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* @package caseyamcl/phpoaipmh |
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* @author Casey McLaughlin <[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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* ------------------------------------------------------------------ |
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*/ |
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namespace Phpoaipmh; |
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/** |
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* OAI-PMH Endpoint Class |
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* |
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* @since v1.0 |
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* @author Casey McLaughlin <[email protected]> |
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*/ |
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class Endpoint implements EndpointInterface |
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{ |
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const AUTO = null; |
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/** |
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* @var Client |
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*/ |
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private $client; |
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/** |
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* @var string |
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*/ |
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private $granularity; |
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/** |
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* Build endpoint using URL and default settings |
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* |
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* @param string $url |
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* @return Endpoint |
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*/ |
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public static function build($url) |
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{ |
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return new Endpoint(new Client($url)); |
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} |
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/** |
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* Constructor |
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* |
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* @param ClientInterface $client Optional; will attempt to auto-build dependency if not passed |
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* @param string $granularity Optional; the OAI date format for fetching records, use constants from |
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* Granularity class |
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*/ |
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public function __construct(ClientInterface $client = null, $granularity = self::AUTO) |
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{ |
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$this->client = $client ?: new Client(); |
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$this->granularity = $granularity; |
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} |
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/** |
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* Identify the OAI-PMH Endpoint |
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* |
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* @return \SimpleXMLElement A XML document with attributes describing the repository |
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*/ |
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public function identify() |
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{ |
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$resp = $this->client->request('Identify'); |
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return $resp; |
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} |
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/** |
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* List Metadata Formats |
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* |
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* Return the list of supported metadata format for a particular record (if $identifier |
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* is provided), or the entire repository (if no arguments are provided) |
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* |
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* @param string $identifier If specified, will return only those metadata formats that a particular record supports |
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* @return RecordIteratorInterface |
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*/ |
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public function listMetadataFormats($identifier = null) |
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{ |
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$params = ($identifier) ? array('identifier' => $identifier) : array(); |
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return new RecordIterator($this->client, 'ListMetadataFormats', $params); |
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} |
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/** |
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* List Record Sets |
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* |
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* @return RecordIteratorInterface |
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*/ |
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public function listSets() |
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{ |
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return new RecordIterator($this->client, 'ListSets'); |
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} |
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/** |
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* Get a single record |
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* |
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* @param string $id Record Identifier |
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* @param string $metadataPrefix Required by OAI-PMH endpoint |
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* @return \SimpleXMLElement An XML document corresponding to the record |
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*/ |
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public function getRecord($id, $metadataPrefix) |
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{ |
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$params = array( |
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'identifier' => $id, |
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'metadataPrefix' => $metadataPrefix |
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); |
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return $this->client->request('GetRecord', $params); |
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} |
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/** |
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* List Record identifiers |
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* |
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* Corresponds to OAI Verb to list record identifiers |
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* |
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* @param string $metadataPrefix Required by OAI-PMH endpoint |
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* @param \DateTimeInterface $from An optional 'from' date for selective harvesting |
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* @param \DateTimeInterface $until An optional 'until' date for selective harvesting |
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* @param string $set An optional setSpec for selective harvesting |
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* @param string $resumptionToken An optional resumptionToken for selective harvesting |
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* @return RecordIteratorInterface |
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*/ |
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public function listIdentifiers($metadataPrefix, $from = null, $until = null, $set = null, $resumptionToken = null) |
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{ |
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return $this->createRecordIterator("ListIdentifiers", $metadataPrefix, $from, $until, $set, $resumptionToken); |
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} |
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/** |
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* List Records |
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* |
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* Corresponds to OAI Verb to list records |
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* |
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* @param string $metadataPrefix Required by OAI-PMH endpoint |
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* @param \DateTimeInterface $from An optional 'from' date for selective harvesting |
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* @param \DateTimeInterface $until An optional 'from' date for selective harvesting |
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* @param string $set An optional setSpec for selective harvesting |
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* @param string $resumptionToken An optional resumptionToken for selective harvesting |
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* @return RecordIteratorInterface |
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*/ |
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public function listRecords($metadataPrefix, $from = null, $until = null, $set = null, $resumptionToken = null) |
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{ |
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return $this->createRecordIterator("ListRecords", $metadataPrefix, $from, $until, $set, $resumptionToken); |
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} |
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/** |
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* Create a record iterator |
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* |
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* @param string $verb OAI Verb |
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* @param string $metadataPrefix Required by OAI-PMH endpoint |
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* @param \DateTimeInterface $from An optional 'from' date for selective harvesting |
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* @param \DateTimeInterface $until An optional 'from' date for selective harvesting |
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* @param string $set An optional setSpec for selective harvesting |
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* @param string $resumptionToken An optional resumptionToken for selective harvesting |
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* |
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* @return RecordIteratorInterface |
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*/ |
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private function createRecordIterator($verb, $metadataPrefix, $from, $until, $set = null, $resumptionToken = null) |
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{ |
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$params = array('metadataPrefix' => $metadataPrefix); |
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if ($from instanceof \DateTimeInterface) { |
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$params['from'] = Granularity::formatDate($from, $this->getGranularity()); |
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} elseif (null !== $from) { |
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throw new \InvalidArgumentException(sprintf( |
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'%s::%s $from parameter must be an instance of \DateTimeInterface', |
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get_called_class(), |
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'createRecordIterator' |
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)); |
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} |
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if ($until instanceof \DateTimeInterface) { |
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$params['until'] = Granularity::formatDate($until, $this->getGranularity()); |
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} elseif (null !== $until) { |
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throw new \InvalidArgumentException(sprintf( |
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'%s::%s $until parameter must be an instance of \DateTimeInterface', |
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get_called_class(), |
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'createRecordIterator' |
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)); |
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} |
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if ($set) { |
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$params['set'] = $set; |
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} |
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return new RecordIterator($this->client, $verb, $params, $resumptionToken); |
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} |
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/** |
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* Lazy load granularity from Identify, if not specified |
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* |
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* @return string |
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*/ |
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private function getGranularity() |
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{ |
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if ($this->granularity === null) { |
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$this->granularity = $this->fetchGranularity(); |
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} |
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return $this->granularity; |
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} |
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/** |
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* Attempt to fetch date format from Identify endpoint (or use default) |
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* |
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* @return string |
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*/ |
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private function fetchGranularity() |
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{ |
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$response = $this->identify(); |
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return (isset($response->Identify->granularity)) |
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? (string) $response->Identify->granularity |
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: Granularity::DATE; |
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} |
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} |
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Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a given class or a super-class is assigned to a property that is type hinted more strictly.
Either this assignment is in error or an instanceof check should be added for that assignment.