public static Expression BuildPlan(Expression provider, QueryableTranslation translation)
{
Expression executor = Expression.Call(
provider,
"ExecuteModel",
null,
Expression.Constant(translation.Model, typeof(QueryableExecutionModel)));
executor = Expression.Convert(
executor,
typeof(IAsyncCursor<>).MakeGenericType(translation.Model.OutputType));
// we have an IAsyncCursor at this point... need to change it into an IEnumerable
executor = Expression.Call(
typeof(IAsyncCursorExtensions),
nameof(IAsyncCursorExtensions.ToEnumerable),
new Type[] { translation.Model.OutputType },
executor,
Expression.Constant(CancellationToken.None));
if (translation.ResultTransformer != null)
{
var lambda = translation.ResultTransformer.CreateAggregator(translation.Model.OutputType);
executor = Expression.Invoke(
lambda,
executor);
}
return executor;
}
public static Expression BuildPlan(Expression provider, QueryableTranslation translation)
{
Expression executor = Expression.Call(
provider,
"ExecuteModel",
null,
Expression.Constant(translation.Model, typeof(QueryableExecutionModel)));
executor = Expression.Convert(
executor,
typeof(IAsyncCursor <>).MakeGenericType(translation.Model.OutputType));
// we have an IAsyncCursor at this point... need to change it into an IEnumerable
executor = Expression.Call(
typeof(IAsyncCursorExtensions),
nameof(IAsyncCursorExtensions.ToEnumerable),
new Type[] { translation.Model.OutputType },
executor,
Expression.Constant(CancellationToken.None));
if (translation.ResultTransformer != null)
{
var lambda = translation.ResultTransformer.CreateAggregator(translation.Model.OutputType);
executor = Expression.Invoke(
lambda,
executor);
}
return(executor);
}
public static Expression BuildPlan(Expression provider, QueryableTranslation translation)
{
Expression executor = Expression.Call(
provider,
"ExecuteModel",
null,
Expression.Constant(translation.Model, typeof(QueryableExecutionModel)));
if (translation.ResultTransformer != null)
{
var lambda = translation.ResultTransformer.CreateAggregator(translation.Model.OutputType);
executor = Expression.Invoke(
lambda,
Expression.Convert(executor, lambda.Parameters[0].Type));
}
return(executor);
}
public static Expression BuildPlan(Expression provider, QueryableTranslation translation)
{
Expression executor = Expression.Call(
provider,
"ExecuteModel",
null,
Expression.Constant(translation.Model, typeof(QueryableExecutionModel)));
if (translation.ResultTransformer != null)
{
var lambda = translation.ResultTransformer.CreateAggregator(translation.Model.OutputType);
executor = Expression.Invoke(
lambda,
Expression.Convert(executor, lambda.Parameters[0].Type));
}
return executor;
}