summaryrefslogtreecommitdiff
path: root/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php
diff options
context:
space:
mode:
Diffstat (limited to 'www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php')
-rw-r--r--www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php128
1 files changed, 128 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php
new file mode 100644
index 00000000..74dcfd07
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/SQLStore/EntityStore/DIHandlers/DIGeoCoordinateHandler.php
@@ -0,0 +1,128 @@
+<?php
+
+namespace SMW\SQLStore\EntityStore\DIHandlers;
+
+use SMW\SQLStore\EntityStore\DataItemHandler;
+use SMW\SQLStore\EntityStore\Exception\DataItemHandlerException;
+use SMW\SQLStore\TableBuilder\FieldType;
+use SMWDataItem as DataItem;
+use SMWDIGeoCoord as DIGeoCoord;
+
+/**
+ * This class implements store access to DIGeoCoord data items.
+ *
+ * @note The table layout and behavior of this class is not coherent with the
+ * way that other DIs work. This is because of the unfortunate use of the
+ * concept table to store extra cache data, but also due to the design of
+ * concept DIs. This will be cleaned up at some point.
+ *
+ * @license GNU GPL v2+
+ * @since 1.8
+ *
+ * @author Nischay Nahata
+ */
+class DIGeoCoordinateHandler extends DataItemHandler {
+
+ /**
+ * Coordinates have three fields: a string version to keep the
+ * serialized value (exact), and two floating point columns for
+ * latitude and longitude (inexact, useful for bounding box selects).
+ * Altitude is not stored in an extra column since no operation uses
+ * this for anything so far.
+ *
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getTableFields() {
+ return [
+ 'o_serialized' => FieldType::FIELD_TITLE,
+ 'o_lat' => FieldType::TYPE_DOUBLE,
+ 'o_lon' => FieldType::TYPE_DOUBLE
+ ];
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getFetchFields() {
+ return [
+ 'o_serialized' => FieldType::FIELD_TITLE
+ ];
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getTableIndexes() {
+ return [
+ 'p_id,o_serialized',
+ 'o_lat,o_lon'
+ ];
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getWhereConds( DataItem $dataItem ) {
+ return [
+ 'o_serialized' => $dataItem->getSerialization()
+ ];
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getInsertValues( DataItem $dataItem ) {
+ return [
+ 'o_serialized' => $dataItem->getSerialization(),
+ 'o_lat' => (string)$dataItem->getLatitude(),
+ 'o_lon' => (string)$dataItem->getLongitude()
+ ];
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getIndexField() {
+ return 'o_serialized';
+ }
+
+ /**
+ * Coordinates do not have a general string version that
+ * could be used for string search, so this method returns
+ * no label column (empty string).
+ *
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function getLabelField() {
+ return '';
+ }
+
+ /**
+ * @since 1.8
+ *
+ * {@inheritDoc}
+ */
+ public function dataItemFromDBKeys( $dbkeys ) {
+
+ if ( is_string( $dbkeys ) ) {
+ return DIGeoCoord::doUnserialize( $dbkeys );
+ }
+
+ throw new DataItemHandlerException( 'Failed to create data item from DB keys.' );
+ }
+
+}