private UnaryPipe <TKey, TPayload, TPayload> GetPipe(IStreamObserver <TKey, TPayload> observer)
{
var lookupKey = CacheKey.Create();
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => PointAtEndTemplate.Generate(this));
Func <PlanNode, IQueryObject, PlanNode> planNode = ((PlanNode p, IQueryObject o) => new PointAtEndPlanNode(p, o, typeof(TKey), typeof(TPayload), true, generatedPipeType.Item2, false));
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, planNode);
var returnValue = (UnaryPipe <TKey, TPayload, TPayload>)instance;
return(returnValue);
}
/// <summary>
/// Generate a batch class definition to be used as a Beat pipe.
/// Compile the definition, dynamically load the assembly containing it, and return the Type representing the
/// union pipe class.
/// </summary>
/// <typeparam name="TKey">The key type for both sides.</typeparam>
/// <typeparam name="TPayload">The payload type.</typeparam>
/// <returns>
/// A type that is defined to be a subtype of UnaryPipe<<typeparamref name="TKey"/>,<typeparamref name="TPayload"/>, <typeparamref name="TPayload"/>>.
/// </returns>
internal static Tuple <Type, string> Generate <TKey, TPayload>(PointAtEndStreamable <TKey, TPayload> stream)
{
Contract.Requires(stream != null);
Contract.Ensures(Contract.Result <Tuple <Type, string> >() == null || typeof(UnaryPipe <TKey, TPayload, TPayload>).GetTypeInfo().IsAssignableFrom(Contract.Result <Tuple <Type, string> >().Item1));
#if CODEGEN_TIMING
Stopwatch sw = new Stopwatch();
sw.Start();
#endif
var template = new PointAtEndTemplate(
string.Format("GeneratedPointAtEnd_{0}", PointAtEndSequenceNumber++),
typeof(TKey), typeof(TPayload));
return(template.Generate <TKey, TPayload>(typeof(IStreamable <,>)));
}
protected override bool CanGenerateColumnar()
{
var typeOfTKey = typeof(TKey);
var typeOfTPayload = typeof(TPayload);
if (typeOfTKey.GetPartitionType() != null)
{
return(false);
}
if (!typeOfTPayload.CanRepresentAsColumnar())
{
return(false);
}
var lookupKey = CacheKey.Create();
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => PointAtEndTemplate.Generate(this));
this.errorMessages = generatedPipeType.Item2;
return(generatedPipeType.Item1 != null);
}
