public IDataReader CreateDataReader(
ITopicDescription topic,
DataReaderQos qos,
IDataReaderListener listener,
StatusKind mask)
{
ReturnCode result = DDS.ReturnCode.AlreadyDeleted;
DataReader dataReader = null;
ITopicDescriptionImpl topicObj = topic as ITopicDescriptionImpl;
ReportStack.Start();
lock (this)
{
if (this.rlReq_isAlive)
{
if (topicObj == null)
{
result = DDS.ReturnCode.BadParameter;
ReportStack.Report(result, "TopicDescription is invalid (null), or not of type " +
"DDS::OpenSplice::TopicDescription.");
}
else
{
result = QosManager.checkQos(qos);
}
if (result == DDS.ReturnCode.Ok)
{
lock (topicObj)
{
if ((topicObj as SacsSuperClass).rlReq_isAlive)
{
TypeSupport ts = topicObj.rlReq_TypeSupport;
if (ts != null)
{
DatabaseMarshaler marshaler = DatabaseMarshaler.GetMarshaler(participant, ts.TypeSpec);
dataReader = ts.CreateDataReader(marshaler);
result = dataReader.init(this, qos, topicObj, "reader <" + topicObj.Name + ">");
if (result == ReturnCode.Ok)
{
dataReader.wlReq_ListenerDispatcher = this.wlReq_ListenerDispatcher;
result = dataReader.SetListener(listener, mask);
}
else
{
dataReader = null;
}
if (result == DDS.ReturnCode.Ok)
{
readerList.Add(dataReader);
if (rlReq_AutoEnableCreatedEntities && this.IsEnabled())
{
result = dataReader.Enable();
}
}
}
else
{
ReportStack.Report(DDS.ReturnCode.PreconditionNotMet, "Were not able to locate TypeSupport belonging to topic " + topic.Name + ".");
}
}
else
{
// ALREADY_DELETED may only apply to the Subscriber in this context,
// so for a deleted TopicDescription use BAD_PARAMETER instead.
result = DDS.ReturnCode.BadParameter;
}
}
if (result != ReturnCode.Ok && dataReader != null)
{
// Ignore result because we prefer the original error.
DeleteDataReader(dataReader);
dataReader = null;
}
}
}
}
ReportStack.Flush(this, result != ReturnCode.Ok);
return(dataReader);
}
