1 files changed, 74 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/Query/Language/ConceptDescription.php b/www/wiki/extensions/SemanticMediaWiki/src/Query/Language/ConceptDescription.php
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+++ b/www/wiki/extensions/SemanticMediaWiki/src/Query/Language/ConceptDescription.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace SMW\Query\Language;
+
+use SMW\DataValueFactory;
+use SMW\DIWikiPage;
+
+/**
+ * Description of a single class as described by a concept page in the wiki.
+ * Corresponds to classes in (the EL fragment of) OWL DL, and to some extent to
+ * tree-shaped queries in SPARQL.
+ *
+ * @license GNU GPL v2+
+ * @since 1.6
+ *
+ * @author Markus Krötzsch
+ */
+class ConceptDescription extends Description {
+
+	/**
+	 * @var DIWikiPage
+	 */
+	private $concept;
+
+	/**
+	 * @param DIWikiPage $concept
+	 */
+	public function __construct( DIWikiPage $concept ) {
+		$this->concept = $concept;
+	}
+
+	/**
+	 * @see Description::getFingerprint
+	 * @since 2.5
+	 *
+	 * @return string
+	 */
+	public function getFingerprint() {
+		return 'Co:' . md5( $this->concept->getHash() );
+	}
+
+	/**
+	 * @return DIWikiPage
+	 */
+	public function getConcept() {
+		return $this->concept;
+	}
+
+	public function getQueryString( $asValue = false ) {
+
+		$pageValue = DataValueFactory::getInstance()->newDataValueByItem( $this->concept, null );
+		$result = '[[' . $pageValue->getPrefixedText() . ']]';
+
+		if ( $asValue ) {
+			return ' <q>' . $result . '</q> ';
+		}
+
+		return $result;
+	}
+
+	public function isSingleton() {
+		return false;
+	}
+
+	public function getQueryFeatures() {
+		return SMW_CONCEPT_QUERY;
+	}
+
+	///NOTE: getSize and getDepth /could/ query the store to find the real size
+	/// of the concept. But it is not clear if this is desirable anyway, given that
+	/// caching structures may be established for retrieving concepts more quickly.
+	/// Inspecting those would require future requests to the store, and be very
+	/// store specific.
+}