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<?php |
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namespace SMW\DataModel; |
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use RuntimeException; |
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use SMW\SemanticData; |
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use SMW\DIWikiPage; |
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use SMW\Exception\DataItemException; |
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/** |
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* Subclass of SemanticData that is used to store the data in SMWDIContainer |
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* objects. It is special since the subject that the stored property-value pairs |
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* refer may or may not be specified explicitly. This can be tested with |
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* hasAnonymousSubject(). When trying to access the subject in anonymous state, |
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* an Exception will be thrown. |
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* |
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* Anonymous container data items are used when no |
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* page context is available, e.g. when specifying such a value in a search form |
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* where the parent page is not known. |
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* |
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* Besides this change, the subclass mainly is needed to restore the disabled |
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* serialization of SemanticData. |
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* |
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* See also the documentation of SMWDIContainer. |
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* |
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* @license GNU GPL v2+ |
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* @since 1.6 |
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* |
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* @author Markus Krötzsch |
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* @author mwjames |
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*/ |
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class ContainerSemanticData extends SemanticData { |
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/** |
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* @var boolean |
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*/ |
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private $skipAnonymousCheck = false; |
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/** |
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* Construct a data container that refers to an anonymous subject. See |
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* the documentation of the class for details. |
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* |
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* @since 1.7 |
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* |
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* @param boolean $noDuplicates stating if duplicate data should be avoided |
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*/ |
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public static function makeAnonymousContainer( $noDuplicates = true, $skipAnonymousCheck = false ) { |
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$containerSemanticData = new ContainerSemanticData( |
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new DIWikiPage( 'SMWInternalObject', NS_SPECIAL, '', 'int' ), |
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$noDuplicates |
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); |
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if ( $skipAnonymousCheck ) { |
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$containerSemanticData->skipAnonymousCheck(); |
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} |
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return $containerSemanticData; |
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} |
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/** |
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* Restore complete serialization which is disabled in SemanticData. |
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*/ |
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public function __sleep() { |
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return array( |
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'mSubject', |
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'mProperties', |
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'mPropVals', |
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'mHasVisibleProps', |
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'mHasVisibleSpecs', |
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'mNoDuplicates', |
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'skipAnonymousCheck' |
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); |
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} |
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/** |
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* Skip the check as it is required for some "search pattern match" activity |
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* to temporarily to access the container without raising an exception. |
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* |
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* @since 2.4 |
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*/ |
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public function skipAnonymousCheck() { |
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$this->skipAnonymousCheck = true; |
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} |
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/** |
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* Check if the subject of this container is an anonymous object. |
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* See the documenation of the class for details. |
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* |
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* @return boolean |
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*/ |
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public function hasAnonymousSubject() { |
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if ( $this->mSubject->getNamespace() == NS_SPECIAL && |
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$this->mSubject->getDBkey() == 'SMWInternalObject' && |
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$this->mSubject->getInterwiki() === '' && |
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$this->mSubject->getSubobjectName() === 'int' ) { |
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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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* Return subject to which the stored semantic annotation refer to, or |
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* throw an exception if the subject is anonymous (if the data has not |
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* been contextualized with setMasterPage() yet). |
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* |
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* @return DIWikiPage subject |
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* @throws DataItemException |
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*/ |
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public function getSubject() { |
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$error = "This container has been classified as anonymous and by trying to access" . |
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" its subject (that has not been given any) an exception is raised to inform about" . |
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" the incorrect usage. An anonymous container can only be used for a search pattern match."; |
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if ( !$this->skipAnonymousCheck && $this->hasAnonymousSubject() ) { |
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throw new DataItemException( $error ); |
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} |
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return $this->mSubject; |
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} |
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/** |
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* Change the object to become an exact copy of the given |
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* SemanticData object. This is used to make other types of |
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* SemanticData into an SMWContainerSemanticData. To copy objects of |
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* the same type, PHP clone() should be used. |
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* |
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* @since 1.7 |
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* |
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* @param $semanticData SemanticData object to copy from |
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*/ |
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public function copyDataFrom( SemanticData $semanticData ) { |
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$this->mSubject = $semanticData->getSubject(); |
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$this->mProperties = $semanticData->getProperties(); |
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$this->mPropVals = array(); |
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foreach ( $this->mProperties as $property ) { |
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$this->mPropVals[$property->getKey()] = $semanticData->getPropertyValues( $property ); |
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} |
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$this->mHasVisibleProps = $semanticData->hasVisibleProperties(); |
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$this->mHasVisibleSpecs = $semanticData->hasVisibleSpecialProperties(); |
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$this->mNoDuplicates = $semanticData->mNoDuplicates; |
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} |
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} |
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SemanticMediaWiki /
SemanticMediaWiki
