CloudKit working with cursor

gistfile1.txt

    /**
    Generic query handling

    - parameter type: An object instance that will be used as the type of the records that will be returned
    - parameter query: The CloudKit query that will be executed
    - parameter completionHandler: The function that will be called with the result of the query
    - parameter errorHandler: The function that will be called when there was an error
    :return: No return value
    */
    internal func queryRecords<T:EVCloudKitDataObject>(type:T, query: CKQuery, completionHandler: (results: [T]) -> Bool, errorHandler:((error: NSError) -> Void)? = nil) {
        if !(query.sortDescriptors != nil) {
            query.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
        }
        let operation = CKQueryOperation(query: query)
        var results = [T]()
        operation.recordFetchedBlock = { record in
            if let parsed = self.fromCKRecord(record) as? T  {
                results.append(parsed)
            }
        }

        operation.queryCompletionBlock = { cursor, error in
            self.handleCallback(error, errorHandler: errorHandler, completionHandler: {
                if completionHandler(results: results) {
                    if cursor != nil {
                        self.queryRecords(cursor!, continueWithResults: results, completionHandler: completionHandler, errorHandler: errorHandler)
                    }
                }
            })
        }
        operation.resultsLimit = CKQueryOperationMaximumResults;
        database.addOperation(operation)
    }


    /**
    Generic query handling continue from cursor
    
    - parameter type: An object instance that will be used as the type of the records that will be returned
    - parameter cursor: the cursor to read from
    - parameter completionHandler: The function that will be called with the result of the query
    - parameter errorHandler: The function that will be called when there was an error
    :return: No return value
    */
    private func queryRecords<T:EVCloudKitDataObject>(cursor: CKQueryCursor, continueWithResults:[T], completionHandler: (results: [T]) -> Bool, errorHandler:((error: NSError) -> Void)? = nil) {
        var results = continueWithResults
        let operation = CKQueryOperation(cursor: cursor)
        operation.recordFetchedBlock = { record in
            if let parsed = self.fromCKRecord(record) as? T  {
                results.append(parsed)
            }
        }

        operation.queryCompletionBlock = { cursor, error in
            self.handleCallback(error, errorHandler: errorHandler, completionHandler: {
                if completionHandler(results: results) {
                    if cursor != nil {
                        self.queryRecords(cursor!, continueWithResults: results, completionHandler: completionHandler, errorHandler: errorHandler)
                    }
                }
            })
        }
        operation.resultsLimit = CKQueryOperationMaximumResults;
        database.addOperation(operation)
    }