public static PipeOutputPackage Infer(PipeOutputPackage basedOffPackage, Type inputType, Type outputType,
PipeCallback processCallbackFunc)
{
int weight = basedOffPackage.NextChainingWeight();
return(new PipeOutputPackage(weight, inputType, outputType, processCallbackFunc));
}
public IEnumerable <PipeOutputPackage> PipePackageInstalled(PipeOutputPackage package)
{
if (package.InputType.IsEnumerable() || package.OutputType.IsEnumerable())
{
yield break;
}
MethodInfo castingMethodInfo = GenericCastingMethodInfo.MakeGenericMethod(package.OutputType);
Type inputType = typeof(IEnumerable <>).MakeGenericType(package.InputType);
Type outputType = typeof(IEnumerable <>).MakeGenericType(package.OutputType);
PipeCallback processCallbackFunc = (rawInputStream, broker) =>
{
var inputEnumerable = (IEnumerable)rawInputStream;
var pipe =
from input in inputEnumerable.Cast <object>()
select package.ProcessInput(input, broker);
return(Task.Factory.ContinueWhenAll(pipe.ToArray(), tasks => tasks.Select(t => t.Result))
.ContinueWith(resultTask =>
{
object results = resultTask.Result;
return castingMethodInfo.Invoke(results, new[] { results });
}));
};
yield return(PipeOutputPackage.Infer(package, inputType, outputType, processCallbackFunc));
}
public void GivenCallbackWhichReturnsNull_WhenLegallyCalled_ItShouldThrowUnexpectedPipePackageOperationException
()
{
PipeCallback processCallbackFunc = (input, broker) => null;
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(string), typeof(string),
processCallbackFunc);
Assert.Throws <UnexpectedPipePackageOperationException>(
async() => await pipePackageOption.ProcessInput("abc", null));
}
public async Task GivenEchoCallback_WhenItIsCalledWithInput_ItShouldReturnTheInput()
{
PipeCallback processCallbackFunc = (input, broker) => Task.FromResult(input);
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(string), typeof(string),
processCallbackFunc);
object output = await pipePackageOption.ProcessInput("abc", null);
Assert.AreEqual("abc", output);
}
GivenProcessorWhichReturnsString_WhenProcesCallbackReturnsInteger_ItShouldThrowUnexpectedPipePackageOperationException
()
{
PipeCallback processCallbackFunc = (input, broker) => Task.FromResult((object)2);
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(string), typeof(string),
processCallbackFunc);
Assert.Throws <UnexpectedPipePackageOperationException>(
async() => await pipePackageOption.ProcessInput("abc", null));
}
public void GivenPackageInstance_WhenNullPassedIntoInputParameter_ItShouldThrowArgumentNullException()
{
PipeCallback processCallbackFunc = (input, broker) => null;
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(string), typeof(string),
processCallbackFunc);
var argumentNullException =
Assert.Throws <ArgumentNullException>(async() => await pipePackageOption.ProcessInput(null, null));
Assert.AreEqual("input", argumentNullException.ParamName);
}
public void GivenPackageWhichProcessesIntegers_WhenInputParameterIsStringType_ItShouldThrowNotArgumentException()
{
PipeCallback processCallbackFunc = (input, broker) => Task.FromResult((object)"abc");
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(int), typeof(string),
processCallbackFunc);
var argumentException =
Assert.Throws <ArgumentException>(async() => await pipePackageOption.ProcessInput("abc", null));
Assert.AreEqual("input", argumentException.ParamName);
}
private static PipeOutputPackage CreatePipeOutputPackage <TSource, TDestination>(
Func <TSource, ISemanticBroker, TDestination> processCallback)
{
PipeCallback wrappedProcessCallback = (input, broker) =>
{
var castedInput = (TSource)input;
object result = processCallback(castedInput, broker);
return(result.IntoTaskResult());
};
return(PipeOutputPackage.Direct(typeof(TSource), typeof(TDestination), wrappedProcessCallback));
}
private PipeOutputPackage ConvertToDataType(Type inputType, PipeOutputPackage basedOffPackage)
{
PipeCallback processCallbackFunc = (input, broker) =>
{
Array array = Array.CreateInstance(inputType, 1);
array.SetValue(input, 0);
return(((object)array).IntoTaskResult());
};
Type outputType = typeof(IEnumerable <>).MakeGenericType(inputType);
return(PipeOutputPackage.Infer(basedOffPackage, inputType, outputType, processCallbackFunc));
}
public void Ctor_WhenNullToOutputTypeParameter_ItShouldThrowArgumentNullExcpetion()
{
var argumentNullException = Assert.Throws <ArgumentNullException>(() =>
{
PipeCallback processCallbackFunc = (input, broker) => null;
PipeOutputPackage pipePackageOption = PipeOutputPackage.Direct(typeof(string), null,
processCallbackFunc);
Assert.Fail();
});
Assert.AreEqual("outputType", argumentNullException.ParamName);
}
private static PipeOutputPackage CreateAsyncPipeOutputPackage <TSource, TDestination>(
Func <TSource, ISemanticBroker, Task <TDestination> > processCallback)
{
PipeCallback wrappedProcessCallback = (input, broker) =>
{
var castedInput = (TSource)input;
return
(processCallback(castedInput, broker)
.ContinueWith(task => (object)task.Result));
};
return(PipeOutputPackage.Direct(typeof(TSource), typeof(TDestination), wrappedProcessCallback));
}
private static PipeOutputPackage SimplifyInput(PipeOutputPackage package)
{
Type newInputType = DetermineNewInterestType(package.InputType);
if (newInputType == package.InputType)
{
return(package);
}
PipeCallback processCallbackFunc = (input, broker) =>
{
Func <object, object> transformFunc =
TransformerFactory.ConvertFor(newInputType, package.InputType);
object revisedInput = transformFunc(input);
return(package.ProcessInput(revisedInput, broker));
};
return(PipeOutputPackage.Direct(newInputType, package.OutputType, processCallbackFunc));
}
private PipeOutputPackage(int weight, Type inputType, Type outputType, PipeCallback processCallbackFunc)
{
if (inputType == null)
{
throw new ArgumentNullException("inputType");
}
if (outputType == null)
{
throw new ArgumentNullException("outputType");
}
if (processCallbackFunc == null)
{
throw new ArgumentNullException("processCallbackFunc");
}
_processCallbackFunc = processCallbackFunc;
InputType = inputType;
OutputType = outputType;
Weight = weight;
}
private PipeOutputPackage(int weight, Type inputType, Type outputType, PipeCallback processCallbackFunc)
{
if (inputType == null)
{
throw new ArgumentNullException("inputType");
}
if (outputType == null)
{
throw new ArgumentNullException("outputType");
}
if (processCallbackFunc == null)
{
throw new ArgumentNullException("processCallbackFunc");
}
_processCallbackFunc = processCallbackFunc;
InputType = inputType;
OutputType = outputType;
Weight = weight;
}
public static PipeOutputPackage Bridge(PipeOutputPackage startPackage, PipeOutputPackage endPackage)
{
if (startPackage.OutputType != endPackage.InputType)
{
throw new NotSupportedException();
}
Type sourceType = startPackage.InputType;
Type destinationType = endPackage.OutputType;
int weight = startPackage.Weight + endPackage.Weight;
PipeCallback processCallbackFunc =
(input, broker) =>
startPackage.ProcessInput(input, broker)
.ContinueWith(startTask =>
{
object intermediate = startTask.Result;
return(endPackage.ProcessInput(intermediate, broker));
}).Unwrap();
return(new PipeOutputPackage(weight, sourceType, destinationType, processCallbackFunc));
}
public static PipeOutputPackage Infer(PipeOutputPackage basedOffPackage, Type inputType, Type outputType,
PipeCallback processCallbackFunc)
{
int weight = basedOffPackage.NextChainingWeight();
return new PipeOutputPackage(weight, inputType, outputType, processCallbackFunc);
}
public static PipeOutputPackage Direct(Type inputType, Type outputType, PipeCallback processCallbackFunc)
{
const int weight = 1;
return(new PipeOutputPackage(weight, inputType, outputType, processCallbackFunc));
}
public static PipeOutputPackage Direct(Type inputType, Type outputType, PipeCallback processCallbackFunc)
{
const int weight = 1;
return new PipeOutputPackage(weight, inputType, outputType, processCallbackFunc);
}