public static Db.OeAsyncEnumerator ApplyBoundFunction(OeQueryContext queryContext)
{
if (queryContext.ODataUri.Path.LastSegment is OperationSegment operationSegment)
{
var edmFunction = (IEdmFunction)operationSegment.Operations.First();
MethodInfo methodInfo = queryContext.EdmModel.GetMethodInfo(edmFunction);
IReadOnlyList <KeyValuePair <String, Object> > parameterList = OeOperationHelper.GetParameters(
queryContext.EdmModel, operationSegment, queryContext.ODataUri.ParameterAliasNodes);
Db.OeBoundFunctionParameter boundFunctionParameter = OeOperationHelper.CreateBoundFunctionParameter(queryContext);
var parameters = new Object[parameterList.Count + 1];
parameters[0] = boundFunctionParameter;
for (int i = 1; i < parameters.Length; i++)
{
parameters[i] = parameterList[i - 1].Value;
}
Object result = methodInfo.Invoke(null, parameters);
queryContext.EntryFactory = boundFunctionParameter.CreateEntryFactory();
if (result is IEnumerable enumerable)
{
return(new Db.OeAsyncEnumeratorAdapter(enumerable, CancellationToken.None));
}
return(new Db.OeScalarAsyncEnumeratorAdapter(Task.FromResult(result), CancellationToken.None));
}
throw new InvalidOperationException("Path last segment not OperationSegment");
}
public static IEnumerable <Order> BoundFunction(Db.OeBoundFunctionParameter <Customer, Order> boundParameter, IEnumerable <String> orderNames)
{
OrderContext orderContext = boundParameter.CreateDataContext <OrderContext>();
IQueryable <Customer> customers = boundParameter.ApplyFilter(orderContext.Customers, orderContext);
IQueryable <Order> orders = customers.SelectMany(c => c.Orders).Where(o => orderNames.Contains(o.Name));
IQueryable result = boundParameter.ApplySelect(orders, orderContext);
List <Order> orderList = boundParameter.Materialize(result).ToList().GetAwaiter().GetResult();
boundParameter.CloseDataContext(orderContext);
return(orderList);
}
public static IEnumerable <Order> BoundFunction(Db.OeBoundFunctionParameter <Customer, Order> boundParameter, IEnumerable <String> orderNames)
{
using (var orderContext = new OdataToEntityDB())
{
IQueryable <Customer> customers = boundParameter.ApplyFilter(orderContext.Customers, orderContext);
IQueryable <Order> orders = customers.SelectMany(c => c.Orders).Where(o => orderNames.Contains(o.Name));
IQueryable result = boundParameter.ApplySelect(orders, orderContext);
List <Order> orderList = boundParameter.Materialize(result).ToListAsync().GetAwaiter().GetResult();
return(orderList);
}
}
