/// <summary>
/// Generate a batch class definition to be used as a Union 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 BinaryPipe<<typeparamref name="TKey"/>,<typeparamref name="TPayload"/>, <typeparamref name="TPayload"/>, <typeparamref name="TKey"/>, <typeparamref name="TPayload"/>>.
/// </returns>
internal static Tuple <Type, string> GenerateUnionPipeClass <TKey, TPayload>(
UnionStreamable <TKey, TPayload> stream)
{
Contract.Requires(stream != null);
Contract.Ensures(Contract.Result <Tuple <Type, string> >() == null || typeof(BinaryPipe <TKey, TPayload, TPayload, TPayload>).GetTypeInfo().IsAssignableFrom(Contract.Result <Tuple <Type, string> >().Item1));
#if CODEGEN_TIMING
Stopwatch sw = new Stopwatch();
sw.Start();
#endif
var template = new UnionTemplate($"GeneratedUnion_{UnionSequenceNumber++}", typeof(TKey), typeof(TPayload));
var gps = template.tm.GenericTypeVariables(template.keyType, template.resultType);
template.genericParameters = gps.BracketedCommaSeparatedString();
var resultRepresentation = new ColumnarRepresentation(template.resultType);
var batchGeneratedFrom_TKey_TPayload = Transformer.GetBatchClassName(template.keyType, template.resultType);
var keyAndPayloadGenericParameters = template.tm.GenericTypeVariables(template.keyType, template.resultType).BracketedCommaSeparatedString();
template.GeneratedBatchName = batchGeneratedFrom_TKey_TPayload + keyAndPayloadGenericParameters;
template.fields = resultRepresentation.AllFields;
return(template.Generate <TKey, TPayload>());
}
private BinaryPipe <TKey, TPayload, TPayload, TPayload> GetPipe(IStreamObserver <TKey, TPayload> observer)
{
var lookupKey = CacheKey.Create();
var generatedPipeType = cachedPipes.GetOrAdd(lookupKey, key => UnionTemplate.GenerateUnionPipeClass(this));
Func <PlanNode, PlanNode, IBinaryObserver, BinaryPlanNode> planNode = ((PlanNode left, PlanNode right, IBinaryObserver o) =>
{
var node = new UnionPlanNode(
left, right, o, typeof(TKey), typeof(TPayload), false, true, this.ErrorMessages);
return(node);
});
var instance = Activator.CreateInstance(generatedPipeType.Item1, this, observer, planNode);
var returnValue = (BinaryPipe <TKey, TPayload, TPayload, TPayload>)instance;
return(returnValue);
}
/// <summary>
/// Generate a batch class definition to be used as a Union 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 BinaryPipe<<typeparamref name="TKey"/>,<typeparamref name="TPayload"/>, <typeparamref name="TPayload"/>, <typeparamref name="TKey"/>, <typeparamref name="TPayload"/>>.
/// </returns>
internal static Tuple <Type, string> GenerateUnionPipeClass <TKey, TPayload>(
UnionStreamable <TKey, TPayload> stream)
{
Contract.Requires(stream != null);
Contract.Ensures(Contract.Result <Tuple <Type, string> >() == null || typeof(BinaryPipe <TKey, TPayload, TPayload, TPayload>).GetTypeInfo().IsAssignableFrom(Contract.Result <Tuple <Type, string> >().Item1));
#if CODEGEN_TIMING
Stopwatch sw = new Stopwatch();
sw.Start();
#endif
string errorMessages = null;
try
{
var template = new UnionTemplate();
var keyType = template.keyType = typeof(TKey);
var payloadType = template.payloadType = typeof(TPayload);
var tm = new TypeMapper(keyType, payloadType);
template.TKey = tm.CSharpNameFor(keyType);
template.TPayload = tm.CSharpNameFor(payloadType);
var gps = tm.GenericTypeVariables(keyType, payloadType);
template.genericParameters = gps.BracketedCommaSeparatedString();
template.className = string.Format("GeneratedUnion_{0}", UnionSequenceNumber++);
var resultRepresentation = new ColumnarRepresentation(payloadType);
var batchGeneratedFrom_TKey_TPayload = Transformer.GetBatchClassName(keyType, payloadType);
var keyAndPayloadGenericParameters = tm.GenericTypeVariables(keyType, payloadType).BracketedCommaSeparatedString();
template.GeneratedBatchName = batchGeneratedFrom_TKey_TPayload + keyAndPayloadGenericParameters;
template.fields = resultRepresentation.AllFields;
template.staticCtor = Transformer.StaticCtor(template.className);
var expandedCode = template.TransformText();
var assemblyReferences = Transformer.AssemblyReferencesNeededFor(typeof(TKey), typeof(TPayload));
assemblyReferences.Add(typeof(IStreamable <,>).GetTypeInfo().Assembly);
assemblyReferences.Add(Transformer.GeneratedStreamMessageAssembly <TKey, TPayload>());
var a = Transformer.CompileSourceCode(expandedCode, assemblyReferences, out errorMessages);
var realClassName = template.className.AddNumberOfNecessaryGenericArguments(keyType, payloadType);
var t = a.GetType(realClassName);
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));
}
}
catch
{
if (Config.CodegenOptions.DontFallBackToRowBasedExecution)
{
throw new InvalidOperationException("Code Generation failed when it wasn't supposed to!");
}
return(Tuple.Create((Type)null, errorMessages));
}
}