public Element <TInputElement, TNextOutputElement>[] Cascade <TNextInputElement, TNextOutputElement>(TInputElement[] input, IDataProvider[] allDataProviders, IStep <TNextInputElement, TNextOutputElement> nextStep, Func <TOutputElement, TNextInputElement> connector)
{
var ret = input.Select(inp => new Element <TInputElement, TNextOutputElement>()
{
Input = inp
}).ToArray();
var myRet = CallDataProviders(allDataProviders, input);
var mySucceededIndecies = Enumerable
.Range(0, input.Length)
.Where(i => IsElementSucceeded(myRet[i] as TElement))
.ToArray();
var nextInput = mySucceededIndecies.Select(ind => connector(myRet[ind].Output)).ToArray();
var nextRet = nextStep.CallDataProviders(allDataProviders, nextInput);
for (int iNext = 0; iNext < nextInput.Length; iNext++)
{
if (nextStep.IsElementSucceeded(nextRet[iNext]))
{
ret[mySucceededIndecies[iNext]].Output = nextRet[iNext].Output;
}
else
{
ret[mySucceededIndecies[iNext]].PossibleErrorReason = nextRet[iNext].PossibleErrorReason;
}
}
return(ret);
}
Cascade <TInputElement, TOutputElement, TNextInputElement, TNextOutputElement>(
this Expression <Func <Element <TInputElement, TOutputElement>[]> > thisExpression,
IDataProvider[] allDataProviders,
IStep <TNextInputElement, TNextOutputElement> nextStep,
Func <TOutputElement, TNextInputElement> connector)
{
Func <Element <TInputElement, TNextOutputElement>[]> retFunc = () =>
{
// TODO: Replace with deferred execution
var myRet = thisExpression.Compile()().ToArray(); // CallDataProviders(allDataProviders, input);
var ret = myRet.Select(inp => new Element <TInputElement, TNextOutputElement>()
{
Input = inp.Input
}).ToArray();
var mySucceededIndecies = Enumerable
.Range(0, ret.Length)
.Where(i => myRet[i].Succeeded)
.ToArray();
var nextInput = mySucceededIndecies.Select(ind => connector(myRet[ind].Output)).ToArray();
var nextRet = nextStep.CallDataProviders(allDataProviders, nextInput);
for (int iNext = 0; iNext < nextInput.Length; iNext++)
{
if (nextStep.IsElementSucceeded(nextRet[iNext]))
{
ret[mySucceededIndecies[iNext]].Output = nextRet[iNext].Output;
}
else
{
ret[mySucceededIndecies[iNext]].PossibleErrorReason = nextRet[iNext].PossibleErrorReason;
}
}
return(ret);
};
return(() => retFunc());
}