ServerEngine.prototype._readSingleNode = function (nodeToRead, timestampsToReturn) {
var self = this;
var nodeId = nodeToRead.nodeId;
var attributeId = nodeToRead.attributeId;
var indexRange = nodeToRead.indexRange;
var dataEncoding = nodeToRead.dataEncoding;
assert(self.address_space instanceof AddressSpace); // initialize not called
if (timestampsToReturn === TimestampsToReturn.Invalid) {
return new DataValue({statusCode: StatusCodes.BadTimestampsToReturnInvalid});
}
timestampsToReturn = (_.isObject(timestampsToReturn)) ? timestampsToReturn : TimestampsToReturn.Neither;
var obj = self.__findObject(nodeId);
if (!obj) {
// may be return BadNodeIdUnknown in dataValue instead ?
// Object Not Found
return new DataValue({statusCode: StatusCodes.BadNodeIdUnknown});
} else {
// check access
// BadUserAccessDenied
// BadNotReadable
// invalid attributes : BadNodeAttributesInvalid
// invalid range : BadIndexRangeInvalid
var dataValue = obj.readAttribute(attributeId, indexRange, dataEncoding);
assert(dataValue.statusCode instanceof StatusCode);
assert(dataValue.isValid());
dataValue = apply_timestamps(dataValue, timestampsToReturn, attributeId);
return dataValue;
}
};
MonitoredItem.prototype._makeDataChangeNotification = function (dataValue) {
var self = this;
var attributeId = self.itemToMonitor.attributeId;
dataValue = apply_timestamps(dataValue, self.timestampsToReturn, attributeId);
return new subscription_service.MonitoredItemNotification({clientHandle: self.clientHandle, value: dataValue });
};