public Expression GetResolvedOptionalElementSelector(ClauseGenerationContext clauseGenerationContext)
{
if (OptionalElementSelector == null)
{
return(null);
}
return
(_cachedElementSelector.GetOrCreate(
r => r.GetResolvedExpression(OptionalElementSelector.Body, OptionalElementSelector.Parameters[0], clauseGenerationContext)));
}
public Expression GetResolvedResultSelector(ClauseGenerationContext clauseGenerationContext)
{
// our result selector usually looks like this: (i, j) => new { i = i, j = j }
// with the data for i coming from the previous node and j identifying the data from this node
// we resolve the selector by first substituting j by a QuerySourceReferenceExpression pointing back to us, before asking the previous node
// to resolve i
return(_cachedResultSelector.GetOrCreate(
r => r.GetResolvedExpression(
QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(this, ResultSelector.Parameters[1], ResultSelector.Body, clauseGenerationContext),
ResultSelector.Parameters[0],
clauseGenerationContext)));
}
public LambdaExpression GetResolvedFunc(ClauseGenerationContext clauseGenerationContext)
{
// '(total, current) => total + current' becomes 'total => total + [current]'
return(_cachedFunc.GetOrCreate(
r => Expression.Lambda(r.GetResolvedExpression(Func.Body, Func.Parameters[1], clauseGenerationContext), Func.Parameters[0])));
}
public Expression GetResolvedPredicate(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedPredicate.GetOrCreate(r => r.GetResolvedExpression(Predicate.Body, Predicate.Parameters[0], clauseGenerationContext)));
}
public Expression GetResolvedKeySelector(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedKeySelector.GetOrCreate(r => r.GetResolvedExpression(KeySelector.Body, KeySelector.Parameters[0], clauseGenerationContext)));
}
public Expression GetResolvedResultSelector(ClauseGenerationContext clauseGenerationContext)
{
return(_cachedResultSelector.GetOrCreate(r => r.GetResolvedExpression(
QuerySourceExpressionNodeUtility.ReplaceParameterWithReference(this, ResultSelector.Parameters[1], ResultSelector.Body, clauseGenerationContext),
ResultSelector.Parameters[0], clauseGenerationContext)));
}
