internal override IStreamObserver <TKey, TPayload> CreatePipe(IStreamObserver <TKey, TPayload> observer)
{
var lookupKey = CacheKey.Create();
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => ColumnToRowTemplate.Generate(this));
Func <PlanNode, IQueryObject, PlanNode> planNode = ((PlanNode p, IQueryObject o) => new ColumnToRowPlanNode(p, o, typeof(TKey), typeof(TPayload)));
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, planNode);
var returnValue = (UnaryPipe <TKey, TPayload, TPayload>)instance;
return(returnValue);
}
internal static Tuple <Type, string> Generate <TKey, TPayload>(ColumnToRowStreamable <TKey, TPayload> stream)
{
Contract.Requires(stream != null);
Contract.Ensures(Contract.Result <Tuple <Type, string> >() != null);
Contract.Ensures(typeof(UnaryPipe <TKey, TPayload, TPayload>).GetTypeInfo().IsAssignableFrom(Contract.Result <Tuple <Type, string> >().Item1));
var keyType = typeof(TKey);
var payloadType = typeof(TPayload);
var assemblyReferences = new List <Assembly>();
assemblyReferences.AddRange(Transformer.AssemblyReferencesNeededFor(keyType));
assemblyReferences.AddRange(Transformer.AssemblyReferencesNeededFor(payloadType));
var generatedClassName = string.Format(CultureInfo.InvariantCulture, "ColumnToRowUnaryPipeGeneratedFrom_{0}_{1}_{2}", keyType.GetValidIdentifier(), payloadType.GetValidIdentifier(), ColumnToRowSequenceNumber++);
var template = new ColumnToRowTemplate(generatedClassName, keyType, payloadType);
var expandedCode = template.TransformText();
assemblyReferences.Add(typeof(IStreamable <,>).GetTypeInfo().Assembly);
assemblyReferences.Add(Transformer.GeneratedStreamMessageAssembly <TKey, TPayload>());
generatedClassName = generatedClassName.AddNumberOfNecessaryGenericArguments(keyType, payloadType);
var a = Transformer.CompileSourceCode(expandedCode, assemblyReferences, out string errorMessages);
if (payloadType.IsAnonymousTypeName())
{
if (errorMessages == null)
{
errorMessages = string.Empty;
}
errorMessages += "\nCodegen Warning: The payload type for ColumnToRow is anonymous, causing the use of Activator.CreateInstance in an inner loop. This will lead to poor performance.\n";
}
var t = a.GetType(generatedClassName);
if (t.GetTypeInfo().IsGenericType)
{
var list = keyType.GetAnonymousTypes();
list.AddRange(payloadType.GetAnonymousTypes());
return(Tuple.Create(t.MakeGenericType(list.ToArray()), errorMessages));
}
else
{
return(Tuple.Create(t, errorMessages));
}
}
