public Db.OeAsyncEnumerator GetAsyncEnumerator(ODataUri odataUri, Stream requestStream, OeRequestHeaders headers, Object dataContext, out Type returnClrType)
{
var importSegment = (OperationImportSegment)odataUri.Path.LastSegment;
List <KeyValuePair <String, Object> > parameters = GetParameters(importSegment, requestStream, headers.ContentType);
IEdmOperationImport operationImport = importSegment.OperationImports.Single();
returnClrType = null;
if (operationImport.Operation.ReturnType != null)
{
IEdmTypeReference returnEdmTypeReference = operationImport.Operation.ReturnType;
if (returnEdmTypeReference is IEdmCollectionTypeReference)
{
returnEdmTypeReference = (returnEdmTypeReference.Definition as IEdmCollectionType).ElementType;
}
returnClrType = OeEdmClrHelper.GetClrType(_model, returnEdmTypeReference.Definition);
}
if (_model.IsDbFunction(operationImport.Operation))
{
return(_dataAdapter.OperationAdapter.ExecuteFunction(dataContext, operationImport.Name, parameters, returnClrType));
}
else
{
return(_dataAdapter.OperationAdapter.ExecuteProcedure(dataContext, operationImport.Name, parameters, returnClrType));
}
}
public async Task ExecuteAsync(ODataUri odataUri, Stream requestStream, OeRequestHeaders headers, Stream responseStream, CancellationToken cancellationToken)
{
var importSegment = (OperationImportSegment)odataUri.Path.LastSegment;
List <KeyValuePair <String, Object> > parameters = GetParameters(importSegment, requestStream, headers.ContentType);
Object dataContext = null;
try
{
dataContext = _dataAdapter.CreateDataContext();
var operation = (EdmOperation)importSegment.OperationImports.Single().Operation;
String procedureName;
if (String.IsNullOrEmpty(operation.Namespace))
{
procedureName = operation.Name;
}
else
{
procedureName = operation.Namespace + "." + operation.Name;
}
Type returnClrType = null;
if (operation.ReturnType != null)
{
IEdmTypeReference returnEdmTypeReference = operation.ReturnType;
if (returnEdmTypeReference is IEdmCollectionTypeReference)
{
returnEdmTypeReference = (returnEdmTypeReference.Definition as IEdmCollectionType).ElementType;
}
returnClrType = OeEdmClrHelper.GetClrType(_model, returnEdmTypeReference.Definition);
}
using (Db.OeEntityAsyncEnumerator asyncEnumerator = _dataAdapter.ExecuteProcedure(dataContext, procedureName, parameters, returnClrType))
{
if (returnClrType == null)
{
if (await asyncEnumerator.MoveNextAsync() && asyncEnumerator.Current != null)
{
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(asyncEnumerator.Current.ToString());
responseStream.Write(buffer, 0, buffer.Length);
}
}
else
{
String entitySetName = _dataAdapter.EntitySetMetaAdapters.FindByClrType(returnClrType).EntitySetName;
IEdmEntitySet entitySet = _model.FindDeclaredEntitySet(entitySetName);
Parsers.OePropertyAccessor[] accessors = Parsers.OePropertyAccessor.CreateFromType(returnClrType, entitySet);
Parsers.OeEntryFactory entryFactory = Parsers.OeEntryFactory.CreateEntryFactory(entitySet, accessors);
var parseUriContext = new Parsers.OeParseUriContext(_model, odataUri, entitySet, null, false)
{
EntryFactory = entryFactory,
Headers = headers
};
await Writers.OeGetWriter.SerializeAsync(_baseUri, parseUriContext, asyncEnumerator, responseStream).ConfigureAwait(false);
}
}
}
finally
{
if (dataContext != null)
{
_dataAdapter.CloseDataContext(dataContext);
}
}
await Task.CompletedTask;
}