public override bool OnReceiveRequest(DicomServer server, ServerAssociationParameters association,
byte presentationID, DicomMessage message)
{
if (message.CommandField == DicomCommandField.CCancelRequest)
{
Platform.Log(LogLevel.Info, "Received Worklist-CANCEL-RQ message.");
_cancelReceived = true;
return true;
}
if (message.AffectedSopClassUid.Equals(SopClass.ModalityWorklistInformationModelFindUid))
{
// We use the ThreadPool to process the thread requests. This is so that we return back
// to the main message loop, and continue to look for cancel request messages coming
// in. There's a small chance this may cause delays in responding to query requests if
// the .NET Thread pool fills up.
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveMWLQuery(server, presentationID, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x, "Unexpected exception in OnReceiveStudyLevelQuery.");
}
});
return true;
}
// no supported message type, send a failure status
server.SendCFindResponse(presentationID, message.MessageId, new DicomMessage(),
DicomStatuses.QueryRetrieveIdentifierDoesNotMatchSOPClass);
return true;
}
private void OnReceiveMWLQuery(DicomServer server, byte presentationId, DicomMessage message)
{
var tagList = new List<DicomTag>();
string specificCharacterSet = string.Empty;
foreach (var attrib in message.DataSet)
{
tagList.Add(attrib.Tag);
if (!attrib.IsNull)
{
switch (attrib.Tag.TagValue)
{
case DicomTags.SpecificCharacterSet:
specificCharacterSet = message.DataSet[DicomTags.SpecificCharacterSet];
break;
#region Case Scheduled Procedure Step Seq
case DicomTags.ScheduledProcedureStepSequence:
DicomAttributeSQ sequence = attrib as DicomAttributeSQ;
DicomSequenceItem sqSubItems = sequence[0];
foreach (var sqSubItem in sqSubItems)
{
if(sqSubItem.IsNull)
continue;
tagList.Add(sqSubItem.Tag);
switch (sqSubItem.Tag.TagValue)
{
case DicomTags.ScheduledStationName:
break;
case DicomTags.Modality:
break;
case DicomTags.ScheduledPerformingPhysiciansName:
break;
case DicomTags.ScheduledProcedureStepStartDate:
break;
case DicomTags.ScheduledProcedureStepStartTime:
break;
// Optional Matching keys
case DicomTags.ScheduledProcedureStepLocation:
break;
case DicomTags.ScheduledProcedureStepDescription:
break;
case DicomTags.RequestedProcedureId:
break;
case DicomTags.ScheduledProcedureStepId:
break;
default:
break;
}
}
break;
#endregion
case DicomTags.PatientId:
break;
case DicomTags.PatientsName:
break;
//Optional Matching Keys
case DicomTags.AccessionNumber:
break;
case DicomTags.ReferringPhysiciansName:
break;
default:
break;
}
}
}
// Populate result Information from Db
List<DicomMessage> results = new List<DicomMessage>();
var msg = new DicomMessage();
msg.DataSet.SpecificCharacterSet = specificCharacterSet;
ModalityWorklistIod iod = new ModalityWorklistIod(msg.DataSet);
iod.SetCommonTags();
iod.PatientIdentificationModule.PatientId = "1402001111";
iod.PatientIdentificationModule.PatientsName = new PersonName("测试");
iod.PatientIdentificationModule.PatientsSex = PatientsSex.M;
iod.PatientIdentificationModule.PatientsBirthDate = new DateTime(2011, 11, 19);
var spssIod = new ScheduledProcedureStepSequenceIod();
spssIod.SetCommonTags();
spssIod.DicomAttributeProvider[DicomTags.ScheduledProcedureStepStartDate].SetString(0, "20141119");
spssIod.DicomAttributeProvider[DicomTags.ScheduledProcedureStepStartTime].SetString(0, "143806");
iod.ScheduledProcedureStepModule.ScheduledProcedureStepSequenceList.Clear();
iod.ScheduledProcedureStepModule.ScheduledProcedureStepSequenceList.Add(spssIod);
results.Add(msg);
try
{
foreach (var dicomMessage in results)
{
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
server.SendCFindResponse(presentationId, message.MessageId, dicomMessage,
DicomStatuses.Pending);
}
}
catch (Exception)
{
if (_cancelReceived)
{
var errorResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, errorResponse,
DicomStatuses.Cancel);
}
return;
}
var finalResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, finalResponse, DicomStatuses.Success);
}
private void SendBufferedResponses(DicomServer server, byte presentationId, DicomMessage requestMessage)
{
while (_responseQueue.Count > 0)
{
DicomMessage response = _responseQueue.Dequeue();
server.SendCFindResponse(presentationId, requestMessage.MessageId, response, DicomStatuses.Pending);
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
if (!server.NetworkActive)
throw new DicomException("Association is no longer valid.");
}
}
public override bool OnReceiveRequest(DicomServer server, ServerAssociationParameters association,
byte presentationId, DicomMessage message)
{
string level = message.DataSet[DicomTags.QueryRetrieveLevel].GetString(0, string.Empty);
if (message.CommandField == DicomCommandField.CCancelRequest)
{
Platform.Log(LogLevel.Info, "Received C-FIND-CANCEL-RQ message.");
_cancelReceived = true;
return true;
}
if (message.AffectedSopClassUid.Equals(SopClass.StudyRootQueryRetrieveInformationModelFindUid))
{
switch (level)
{
case "STUDY":
// We use the ThreadPool to process the thread requests. This is so that we return back
// to the main message loop, and continue to look for cancel request messages coming
// in. There's a small chance this may cause delays in responding to query requests if
// the .NET Thread pool fills up.
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveStudyLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x, "Unexpected exception in OnReceiveStudyLevelQuery.");
}
});
return true;
case "SERIES":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveSeriesLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceiveSeriesLevelQuery.");
}
});
return true;
case "IMAGE":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveImageLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceiveImageLevelQuery.");
}
});
return true;
default:
{
Platform.Log(LogLevel.Error, "Unexpected Study Root Query/Retrieve level: {0}", level);
server.SendCFindResponse(presentationId, message.MessageId, new DicomMessage(),
DicomStatuses.QueryRetrieveIdentifierDoesNotMatchSOPClass);
return true;
}
}
}
if (message.AffectedSopClassUid.Equals(SopClass.PatientRootQueryRetrieveInformationModelFindUid))
{
switch (level)
{
case "PATIENT":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceivePatientQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceivePatientQuery.");
}
});
return true;
case "STUDY":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveStudyLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceiveStudyLevelQuery.");
}
});
return true;
case "SERIES":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveSeriesLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceiveSeriesLevelQuery.");
}
});
return true;
case "IMAGE":
ThreadPool.QueueUserWorkItem(delegate
{
try
{
OnReceiveImageLevelQuery(server, presentationId, message);
}
catch (Exception x)
{
Platform.Log(LogLevel.Error, x,
"Unexpected exception in OnReceiveImageLevelQuery.");
}
});
return true;
default:
{
Platform.Log(LogLevel.Error, "Unexpected Patient Root Query/Retrieve level: {0}", level);
server.SendCFindResponse(presentationId, message.MessageId, new DicomMessage(),
DicomStatuses.QueryRetrieveIdentifierDoesNotMatchSOPClass);
return true;
}
}
}
// no supported message type, send a failure status
server.SendCFindResponse(presentationId, message.MessageId, new DicomMessage(),
DicomStatuses.QueryRetrieveIdentifierDoesNotMatchSOPClass);
return true;
}
// what is the scenario about image level query
// TODO add support in Image Level Query
private void OnReceiveImageLevelQuery(DicomServer server, byte presentationId, DicomMessage message)
{
var tagList = new List<DicomTag>();
using (var pacsContext = new PacsContext())
{
var adapter = (IObjectContextAdapter)pacsContext;
var query = new ObjectQuery<Instance>("Instances", adapter.ObjectContext);
DicomAttributeCollection data = message.DataSet;
string studyInstanceUid = data[DicomTags.StudyInstanceUid].GetString(0, String.Empty);
string seriesInstanceUid = data[DicomTags.SeriesInstanceUid].GetString(0, String.Empty);
foreach (DicomAttribute attrib in data)
{
if (attrib.Tag.TagValue.Equals(DicomTags.SpecificCharacterSet)
|| attrib.Tag.TagValue.Equals(DicomTags.QueryRetrieveLevel))
continue;
tagList.Add(attrib.Tag);
if (!attrib.IsNull)
{
switch (attrib.Tag.TagValue)
{
}
}
}
int resultCount = 0;
try
{
foreach (Instance instance in query)
{
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
resultCount++;
if (DicomSetting.Default.MaxQueryResponses != -1 &&
DicomSetting.Default.MaxQueryResponses < resultCount)
{
SendBufferedResponses(server, presentationId, message);
throw new DicomException("Maximum Configured Query Responses Exceeded: " + resultCount);
}
var response = new DicomMessage();
PopuldateInstance(message, response, tagList, instance);
_responseQueue.Enqueue(response);
if (_responseQueue.Count >= DicomSetting.Default.BufferedQueryResponses)
{
SendBufferedResponses(server, presentationId, message);
}
}
SendBufferedResponses(server, presentationId, message);
}
catch (Exception e)
{
if (_cancelReceived)
{
var errorResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, errorResponse,
DicomStatuses.Cancel);
}
}
}
var finalResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, finalResponse, DicomStatuses.Success);
}
private void OnReceiveSeriesLevelQuery(DicomServer server, byte presentationId, DicomMessage message)
{
var tagList = new List<DicomTag>();
using (var pacsContext = new PacsContext())
{
var adapter = (IObjectContextAdapter)pacsContext;
var query = new ObjectQuery<Series>("Series", adapter.ObjectContext);
DicomAttributeCollection data = message.DataSet;
foreach (DicomAttribute attrib in data)
{
tagList.Add(attrib.Tag);
if (!attrib.IsNull)
{
switch (attrib.Tag.TagValue)
{
case DicomTags.StudyInstanceUid:
{
var uids = data[DicomTags.StudyInstanceUid].GetString(0, string.Empty);
IQueryable<int> studyQuery = from s in pacsContext.Studies
where uids.Contains(s.StudyUid)
select s.Id;
var result = studyQuery.ToArray();
if (result.Length == 0)
{
server.SendCFindResponse(presentationId, message.MessageId, new DicomMessage(),
DicomStatuses.Success);
return;
}
query = query.Where(QueryHelper.SetIntArrayCondition("StudyForeignKey", result));
}
break;
case DicomTags.SeriesInstanceUid:
{
var cond = QueryHelper.SetStringArrayCondition("SeriesUid",
(string[])
data[DicomTags.SeriesInstanceUid]
.Values);
query = query.Where(cond);
}
break;
case DicomTags.Modality:
{
var cond = QueryHelper.SetStringCondition("Modality",
data[DicomTags.Modality].GetString(0,
string
.Empty));
query = query.Where(cond);
}
break;
case DicomTags.SeriesNumber:
{
var cond = QueryHelper.SetStringCondition("SeriesNumber",
data[DicomTags.SeriesNumber].GetString(0,
string
.Empty));
query = query.Where(cond);
}
break;
case DicomTags.SeriesDescription:
{
var cond = QueryHelper.SetStringCondition("SeriesDescription",
data[DicomTags.StudyDescription].GetString
(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.PerformedProcedureStepStartDate:
{
var cond = QueryHelper.SetRangeCondition("PerformedProcedureStepStartDate",
data[
DicomTags
.PerformedProcedureStepStartDate]
.GetString(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.PerformedProcedureStepStartTime:
{
var cond = QueryHelper.SetRangeCondition("PerformedProcedureStepStartTime",
data[
DicomTags
.PerformedProcedureStepStartTime]
.GetString(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.RequestAttributesSequence: // todo
break;
default:
break;
}
}
}
int resultCount = 0;
try
{
foreach (Series series in query)
{
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
resultCount++;
if (DicomSetting.Default.MaxQueryResponses != -1 &&
DicomSetting.Default.MaxQueryResponses < resultCount)
{
SendBufferedResponses(server, presentationId, message);
throw new DicomException("Maximum Configured Query Responses Exceeded: " + resultCount);
}
var response = new DicomMessage();
PopulateSeries(message, response, tagList, series);
_responseQueue.Enqueue(response);
if (_responseQueue.Count >= DicomSetting.Default.BufferedQueryResponses)
{
SendBufferedResponses(server, presentationId, message);
}
}
SendBufferedResponses(server, presentationId, message);
}
catch (Exception e)
{
if (_cancelReceived)
{
var errorResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, errorResponse,
DicomStatuses.Cancel);
}
}
}
var finalResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, finalResponse, DicomStatuses.Success);
}
private void OnReceiveStudyLevelQuery(DicomServer server, byte presentationId, DicomMessage message)
{
var tagList = new List<DicomTag>();
using (var pacsContext = new PacsContext())
{
var adapter = (IObjectContextAdapter)pacsContext;
var query = new ObjectQuery<Study>("Studies", adapter.ObjectContext);
DicomAttributeCollection data = message.DataSet;
foreach (DicomAttribute attrib in message.DataSet)
{
tagList.Add(attrib.Tag);
if (!attrib.IsNull)
{
switch (attrib.Tag.TagValue)
{
case DicomTags.StudyInstanceUid:
{
var cond = QueryHelper.SetStringArrayCondition("StudyInstanceUid",
(string[])data[DicomTags.StudyInstanceUid].Values);
if (!string.IsNullOrEmpty(cond))
{
query = query.Where(cond);
}
}
break;
case DicomTags.PatientsName:
{
var cond = QueryHelper.SetStringCondition("PatientName",
data[DicomTags.PatientsName].GetString(0,
string
.Empty));
if (!string.IsNullOrEmpty(cond))
{
query = query.Where(cond);
}
break;
}
case DicomTags.PatientId:
{
var cond = QueryHelper.SetStringCondition("PatientId",
data[DicomTags.PatientId].GetString(0,
string
.Empty));
break;
}
case DicomTags.PatientsBirthDate:
{
var cond = QueryHelper.SetRangeCondition("PatientBirthDate",
data[DicomTags.PatientsBirthDate].GetString
(0, string.Empty));
query = query.Where(cond);
break;
}
case DicomTags.PatientsSex:
{
var cond = QueryHelper.SetStringCondition("PatientSex",
data[DicomTags.PatientsSex].GetString(0,
string
.Empty));
query = query.Where(cond);
}
break;
case DicomTags.StudyDate:
{
var cond = QueryHelper.SetRangeCondition("StudyDate",
data[DicomTags.StudyDate].GetString(0,
string
.Empty));
query = query.Where(cond);
}
break;
case DicomTags.StudyTime:
{
var cond = QueryHelper.SetRangeCondition("StudyTime",
data[DicomTags.StudyTime].GetString(0,
string
.Empty));
query = query.Where(cond);
}
break;
case DicomTags.AccessionNumber:
{
var cond = QueryHelper.SetStringCondition("AccessionNumber",
data[DicomTags.AccessionNumber].GetString(
0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.StudyId:
{
var cond = QueryHelper.SetStringCondition("StudyId",
data[DicomTags.StudyId].GetString(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.StudyDescription:
{
var cond = QueryHelper.SetStringCondition("StudyDescription",
data[DicomTags.StudyDescription].GetString(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.ReferringPhysiciansName:
{
var cond = QueryHelper.SetStringCondition("RefPhysician",
data[DicomTags.ReferringPhysiciansName]
.GetString(0, string.Empty));
query = query.Where(cond);
}
break;
case DicomTags.ModalitiesInStudy:
break;
default:
break;
}
}
}
int resultCount = 0;
try
{
foreach (Study study in query)
{
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
resultCount++;
if (DicomSetting.Default.MaxQueryResponses != -1 &&
DicomSetting.Default.MaxQueryResponses < resultCount)
{
SendBufferedResponses(server, presentationId, message);
throw new DicomException("Maximum Configured Query Responses Exceeded: " + resultCount);
}
var response = new DicomMessage();
PopulateStudy(response, tagList, study);
_responseQueue.Enqueue(response);
if (_responseQueue.Count >= DicomSetting.Default.BufferedQueryResponses)
{
SendBufferedResponses(server, presentationId, message);
}
}
SendBufferedResponses(server, presentationId, message);
}
catch (Exception e)
{
if (_cancelReceived)
{
var errorResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, errorResponse,
DicomStatuses.Cancel);
}
return;
}
}
var finalResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, finalResponse, DicomStatuses.Success);
}
private void OnReceivePatientQuery(DicomServer server, byte presentationId, DicomMessage message)
{
var tagList = new List<DicomTag>();
using (var pacsContext = new PacsContext())
{
var adapter = (IObjectContextAdapter)pacsContext;
var query = new ObjectQuery<Patient>("Patients", adapter.ObjectContext);
DicomAttributeCollection data = message.DataSet;
foreach (DicomAttribute attribute in data)
{
tagList.Add(attribute.Tag);
if (!attribute.IsNull)
{
switch (attribute.Tag.TagValue)
{
case DicomTags.PatientsName:
{
var cond = QueryHelper.SetStringCondition("PatientName",
data[DicomTags.PatientsName].GetString(0, string.Empty));
query = query.Where(cond);
break;
}
case DicomTags.PatientId:
{
var cond = QueryHelper.SetStringCondition("PatientId",
data[DicomTags.PatientId].GetString(0, string.Empty));
query = query.Where(cond);
break;
}
case DicomTags.IssuerOfPatientId:
{
var cond = QueryHelper.SetStringCondition("Issuer",
data[DicomTags.IssuerOfPatientId]
.GetString(0, string.Empty));
}
break;
case DicomTags.PatientsSex:
break;
case DicomTags.PatientsBirthDate:
{
var cond = QueryHelper.SetStringArrayCondition("PatientBirthDate",
(string[])
data[DicomTags.PatientsBirthDate]
.Values);
query = query.Where(cond);
}
break;
default:
break;
}
}
}
int resultCount = 0;
try
{
foreach (Patient patient in query)
{
if (_cancelReceived)
{
throw new DicomException("DICOM C-Cancel Received");
}
resultCount++;
if (DicomSetting.Default.MaxQueryResponses != -1 &&
DicomSetting.Default.MaxQueryResponses < resultCount)
{
SendBufferedResponses(server, presentationId, message);
throw new DicomException("Maximum Configured Query Responses Exceeded: " + resultCount);
}
var response = new DicomMessage();
PopulatePatient(response, tagList, patient);
_responseQueue.Enqueue(response);
if (_responseQueue.Count >= DicomSetting.Default.BufferedQueryResponses)
{
SendBufferedResponses(server, presentationId, message);
}
}
SendBufferedResponses(server, presentationId, message);
}
catch (Exception e)
{
if (_cancelReceived)
{
var errorResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, errorResponse,
DicomStatuses.Cancel);
}
}
}
var finalResponse = new DicomMessage();
server.SendCFindResponse(presentationId, message.MessageId, finalResponse, DicomStatuses.Success);
}
public override bool OnReceiveRequest(DicomServer server, ServerAssociationParameters association,
byte presentationID, DicomMessage message)
{
#region MPPS NCreate Request
if (message.CommandField == DicomCommandField.NCreateRequest)
{
ModalityPerformedProcedureStepIod mppsIod = new ModalityPerformedProcedureStepIod(message.DataSet);
bool conform = CheckNCreateDataSetConformance(server, association, presentationID, mppsIod, true);
if (!conform)
{
server.SendNCreateResponse(presentationID, message.MessageId, new DicomMessage(), DicomStatuses.InvalidAttributeValue);
Platform.Log(LogLevel.Error, "Sending Invalid Attributes Response.");
return true;
}
// wrong status
if (mppsIod.PerformedProcedureStepInformation.PerformedProcedureStepStatus != PerformedProcedureStepStatus.InProgress)
{
server.SendNCreateResponse(presentationID, message.MessageId, new DicomMessage(), DicomStatuses.InvalidAttributeValue);
Platform.Log(LogLevel.Error, "Received N-Create Request with bad status.");
return true;
}
if (!ProcessNCreateRequest(server, presentationID, message))
{
server.SendNCreateResponse(presentationID, message.MessageId, new DicomMessage(), DicomStatuses.ProcessingFailure);
return true;
}
server.SendNCreateResponse(presentationID, message.MessageId, new DicomMessage(), DicomStatuses.Success);
}
#endregion
#region MPPS NSet Request
if (message.CommandField == DicomCommandField.NSetRequest)
{
ModalityPerformedProcedureStepIod mppsIod = new ModalityPerformedProcedureStepIod(message.DataSet);
string studyInstanceUID = mppsIod.
PerformedProcedureStepRelationship.
DicomAttributeProvider[DicomTags.StudyInstanceUid].
GetString(0, "");
// Get Cached
ModalityPerformedProcedureStepIod cachedMppsIod = new ModalityPerformedProcedureStepIod();
bool conform = CheckNSetDataSetConformance(server, association, presentationID, cachedMppsIod, mppsIod, true);
if (!conform)
{
server.SendNCreateResponse(presentationID, message.MessageId, new DicomMessage(), DicomStatuses.InvalidAttributeValue);
Platform.Log(LogLevel.Error, "Sending Failure Response.");
return true;
}
bool success = true;
if (mppsIod.PerformedProcedureStepInformation.PerformedProcedureStepStatus
== PerformedProcedureStepStatus.Completed)
{
success = ProcessNSetRequestForCompleted(server, presentationID, message);
}
if (mppsIod.PerformedProcedureStepInformation.PerformedProcedureStepStatus
== PerformedProcedureStepStatus.Discontinued)
{
success = ProcessNSetRequestForDiscontinued(server, presentationID, message);
}
server.SendNSetResponse(presentationID, message.MessageId, new DicomMessage(),
success ? DicomStatuses.Success : DicomStatuses.ProcessingFailure);
}
#endregion
// no supported message type, send a failure status
server.SendCFindResponse(presentationID, message.MessageId, new DicomMessage(),
DicomStatuses.QueryRetrieveIdentifierDoesNotMatchSOPClass);
return true;
}