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<?php |
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namespace SG; |
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use SMW\Store; |
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use SMW\SemanticData; |
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use SMW\DIProperty; |
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/** |
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* @ingroup SG |
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* @ingroup SemanticGlossary |
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* |
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* @license GNU GPL v2+ |
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* @since 1.0 |
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* |
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* @author Stephan Gambke |
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*/ |
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class SemanticDataComparator { |
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/** |
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* @var Store |
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*/ |
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private $store = null; |
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/** |
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* @var SemanticData |
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*/ |
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private $semanticData = null; |
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/** |
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* @since 1.0 |
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* |
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* @param Store $store |
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* @param SemanticData $semanticData |
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*/ |
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public function __construct( Store $store, SemanticData $semanticData ) { |
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$this->store = $store; |
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$this->semanticData = $semanticData; |
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} |
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/** |
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* @since 1.0 |
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* |
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* @param string $propertyId |
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* |
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* @return boolean |
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*/ |
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public function compareForProperty( $propertyId ) { |
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list( $newEntries, $oldEntries ) = $this->lookupPropertyValues( $propertyId ); |
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if ( $this->hasNotSamePropertyValuesCount( $newEntries, $oldEntries ) ) { |
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return true; |
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} |
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if ( $this->hasUnmatchPropertyValue( $newEntries, $oldEntries ) ) { |
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return true; |
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} |
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return false; |
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} |
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private function lookupPropertyValues( $propertyId ) { |
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$properties = $this->semanticData->getProperties(); |
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if ( array_key_exists( $propertyId, $properties ) ) { |
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$newEntries = $this->semanticData->getPropertyValues( $properties[$propertyId] ); |
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$oldEntries = $this->store->getPropertyValues( |
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$this->semanticData->getSubject(), |
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$properties[$propertyId] |
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); |
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return array( |
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$newEntries, |
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$oldEntries |
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); |
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} |
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$newEntries = array(); |
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$oldEntries = array(); |
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try{ |
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$property = new DIProperty( $propertyId ); |
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} catch ( \Exception $e ) { |
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return array( |
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$newEntries, |
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$oldEntries |
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); |
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} |
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$oldEntries = $this->store->getPropertyValues( |
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$this->semanticData->getSubject(), |
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$property |
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); |
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return array( |
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$newEntries, |
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$oldEntries |
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); |
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} |
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private function hasNotSamePropertyValuesCount( $newEntries, $oldEntries ) { |
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return count( $newEntries ) !== count( $oldEntries ); |
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} |
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private function hasUnmatchPropertyValue( $newEntries, $oldEntries ) { |
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foreach ( $newEntries as $newDi ) { |
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$found = false; |
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foreach ( $oldEntries as $oldKey => $oldDi ) { |
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if ( $newDi->getHash() === $oldDi->getHash() ) { |
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$found = true; |
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unset( $oldEntries[$oldKey] ); |
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break; |
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} |
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} |
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// If no match was possible... |
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if ( !$found ) { |
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return true; |
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} |
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} |
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// Are there unmatched old entries left? |
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if ( count( $oldEntries ) > 0 ) { |
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return true; |
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} |
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return false; |
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} |
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} |
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