1 files changed, 74 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Number.php b/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Number.php
new file mode 100644
index 00000000..7105f31c
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Number.php
@@ -0,0 +1,74 @@
+<?php
+/**
+ * @ingroup SMWDataItems
+ */
+
+use SMW\Exception\DataItemException;
+
+/**
+ * This class implements number data items.
+ *
+ * @since 1.6
+ *
+ * @author Markus Krötzsch
+ * @ingroup SMWDataItems
+ */
+class SMWDINumber extends SMWDataItem {
+
+	/**
+	 * Internal value.
+	 * @var float|int
+	 */
+	protected $m_number;
+
+	public function __construct( $number ) {
+		if ( !is_numeric( $number ) ) {
+			throw new DataItemException( "Initialization value '$number' is not a number." );
+		}
+		$this->m_number = $number;
+	}
+
+	public function getDIType() {
+		return SMWDataItem::TYPE_NUMBER;
+	}
+
+	public function getNumber() {
+		return $this->m_number;
+	}
+
+	public function getSortKey() {
+		return $this->m_number;
+	}
+
+	/**
+	 * @see SMWDataItem::getSortKeyDataItem()
+	 * @return SMWDataItem
+	 */
+	public function getSortKeyDataItem() {
+		return $this;
+	}
+
+	public function getSerialization() {
+		return strval( $this->m_number );
+	}
+
+	/**
+	 * Create a data item from the provided serialization string and type
+	 * ID.
+	 * @note PHP can convert any string to some number, so we do not do
+	 * validation here (because this would require less efficient parsing).
+	 * @return SMWDINumber
+	 */
+	public static function doUnserialize( $serialization ) {
+		return new SMWDINumber( floatval( $serialization ) );
+	}
+
+	public function equals( SMWDataItem $di ) {
+		if ( $di->getDIType() !== SMWDataItem::TYPE_NUMBER ) {
+			return false;
+		}
+
+		return $di->getNumber() === $this->m_number;
+	}
+
+}