1 files changed, 69 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Bool.php b/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Bool.php
new file mode 100644
index 00000000..8bddf9fb
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/includes/dataitems/SMW_DI_Bool.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * @ingroup SMWDataItems
+ */
+
+use SMW\Exception\DataItemException;
+
+/**
+ * This class implements Boolean data items.
+ *
+ * @since 1.6
+ *
+ * @author Markus Krötzsch
+ * @ingroup SMWDataItems
+ */
+class SMWDIBoolean extends SMWDataItem {
+
+	/**
+	 * Internal value.
+	 * @var bool
+	 */
+	protected $m_boolean;
+
+	public function __construct( $boolean ) {
+		if ( !is_bool( $boolean ) ) {
+			throw new DataItemException( "Initialization value '$boolean' is not a boolean." );
+		}
+
+		$this->m_boolean = ( $boolean == true );
+	}
+
+	public function getDIType() {
+		return SMWDataItem::TYPE_BOOLEAN;
+	}
+
+	public function getBoolean() {
+		return $this->m_boolean;
+	}
+
+	public function getSerialization() {
+		return $this->m_boolean ? 't' : 'f';
+	}
+
+	public function getSortKey() {
+		return $this->m_boolean ? 1 : 0;
+	}
+
+	/**
+	 * Create a data item from the provided serialization string and type
+	 * ID.
+	 * @return SMWDIBoolean
+	 */
+	public static function doUnserialize( $serialization ) {
+		if ( $serialization == 't' ) {
+			return new SMWDIBoolean( true );
+		} elseif  ( $serialization == 'f' ) {
+			return new SMWDIBoolean( false );
+		} else {
+			throw new DataItemException( "Boolean data item unserialised from illegal value '$serialization'" );
+		}
+	}
+
+	public function equals( SMWDataItem $di ) {
+		if ( $di->getDIType() !== SMWDataItem::TYPE_BOOLEAN ) {
+			return false;
+		}
+		return $di->getBoolean() === $this->m_boolean;
+	}
+}