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<?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;
}
}
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