1 files changed, 86 insertions, 0 deletions
diff --git a/www/wiki/extensions/SemanticMediaWiki/src/SPARQLStore/Exception/BadHttpEndpointResponseException.php b/www/wiki/extensions/SemanticMediaWiki/src/SPARQLStore/Exception/BadHttpEndpointResponseException.php
new file mode 100644
index 00000000..5686fc03
--- /dev/null
+++ b/www/wiki/extensions/SemanticMediaWiki/src/SPARQLStore/Exception/BadHttpEndpointResponseException.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace SMW\SPARQLStore\Exception;
+
+/**
+ * Class to escalate SPARQL query errors to the interface. We only do this for
+ * malformed queries, permission issues, etc. Connection problems are usually
+ * ignored so as to keep the wiki running even if the SPARQL backend is down.
+ *
+ * @ingroup Sparql
+ *
+ * @license GNU GPL v2+
+ * @since 1.6
+ *
+ * @author Markus Krötzsch
+ */
+class BadHttpEndpointResponseException extends \Exception {
+
+	/// Error code: malformed query
+	const ERROR_MALFORMED      = 1;
+	/// Error code: service refused to handle the request
+	const ERROR_REFUSED        = 2;
+	/// Error code: the query required a graph that does not exist
+	const ERROR_GRAPH_NOEXISTS = 3;
+	/// Error code: some existing graph should not exist to run this query
+	const ERROR_GRAPH_EXISTS   = 4;
+	/// Error code: unknown error
+	const ERROR_OTHER          = 5;
+	/// Error code: required service not known
+	const ERROR_NOSERVICE      = 6;
+
+	/**
+	 * SPARQL query that caused the problem.
+	 * @var string
+	 */
+	public $queryText;
+
+	/**
+	 * Error code
+	 * @var integer
+	 */
+	public $errorCode;
+
+	/**
+	 * Constructor that creates an error message based on the given data.
+	 *
+	 * @param $errorCode integer error code as defined in this class
+	 * @param $queryText string with the original SPARQL query/update
+	 * @param $endpoint string URL of the endpoint
+	 * @param $httpCode mixed integer HTTP error code or some string to print there
+	 */
+	function __construct( $errorCode, $queryText, $endpoint, $httpCode = '<not given>' ) {
+
+		switch ( $errorCode ) {
+			case self::ERROR_MALFORMED:
+				$errorName = 'Malformed query';
+				break;
+			case self::ERROR_REFUSED:
+				$errorName = 'Query refused';
+				break;
+			case self::ERROR_GRAPH_NOEXISTS:
+				$errorName = 'Graph not existing';
+				break;
+			case self::ERROR_GRAPH_EXISTS:
+				$errorName = 'Graph already exists';
+				break;
+			case self::ERROR_NOSERVICE:
+				$errorName = 'Required service has not been defined';
+				break;
+			default:
+				$errorCode = self::ERROR_OTHER;
+				$errorName = 'Unkown error';
+		}
+
+		$message = "A SPARQL query error has occurred\n" .
+		  "Query: $queryText\n" .
+		  "Error: $errorName\n" .
+		  "Endpoint: $endpoint\n" .
+		  "HTTP response code: $httpCode\n";
+
+		parent::__construct( $message, $errorCode );
+		$this->errorCode = $errorCode;
+		$this->queryText = $queryText;
+	}
+
+}