/// <summary>
/// Asynchronous. An extension method for the <see cref="IDataRowProvider"/>. Used to perform a lookup with the <see cref="IDataRowProvider"/> interface. If the lookup produces no results, the operation is deemed a failure with the <see cref="DataAccess.EmptyResultSetException"/> Exception. If the operation fails, the incoming Type, and method name will added to Exception.
/// </summary>
/// <typeparam name="T">The type of object to return.</typeparam>
/// <typeparam name="T2">Derived type of T.</typeparam>
/// <param name="dataRowProvider">The <see cref="IDataRowProvider"/> used to submit query.</param>
/// <param name="dataOrder">The information for the query.</param>
/// <param name="converter">A callback used to convert the combination of the <see cref="DataRow"/>, and the <see cref="IAliasedCommandTypeDataOrder"/> into an object of type T.</param>
/// <param name="declaringTypeCallback">The callback to define the type to be added to the <see cref="Utilities.OperationResult{T}"/> if faulted.</param>
/// <param name="callingMethod">The callback to define the type to be added to the <see cref="Utilities.OperationResult{T}"/> if faulted.</param>
/// <returns>A <see cref='Task'/> with a result of <see cref="Utilities.OperationResult{T}"/> containing result upon success, and Exceptions upon failure.</returns>
public async static Task <OperationResult <T> > LookupAsync <T, T2>(this IDataRowProvider dataRowProvider, IAliasedCommandTypeDataOrder dataOrder, Func <IAliasedCommandTypeDataOrder, DataRow, T2> converter, Func <Type> declaringTypeCallback, string callingMethod) where T2 : T
{
OperationResult <List <DataRow> > operation = await dataRowProvider.GetTableAsync(dataOrder, r => r, declaringTypeCallback, callingMethod);
return(operation.HadErrors ?
new OperationResult <T>(operation.Exceptions) :
operation.Result.Any() == false ?
new OperationResult <T>(false, default(T)) :
new OperationResult <T>(await Task.Run(() => converter(dataOrder, operation.Result[0]))));
}
/// <summary>
/// Asynchronous. An extension method for the <see cref="IDataRowProvider"/>. Used to produce a list of objects.
/// </summary>
/// <typeparam name="T">The type of object represented by the lookup.</typeparam>
/// <param name="dataRowProvider">The <see cref="IDataRowProvider"/> used to submit query.</param>
/// <param name="dataOrder">The information for the query.</param>
/// <param name="converter">A callback used to convert the <see cref="DataRow"/>into an object of type T.</param>
/// <returns>A <see cref='Task'/> with a result of <see cref="Utilities.OperationResult{T}"/> containing result upon success, and Exceptions upon failure.</returns>
public static Task <OperationResult <List <T> > > GetTableAsync <T>(this IDataRowProvider dataRowProvider, IAliasedCommandTypeDataOrder dataOrder, Func <DataRow, T> converter) =>
dataRowProvider.GetTableAsync(dataOrder, (dO, row) => converter(row));
/// <summary>
/// Asynchronous. An extension method for the <see cref="IDataRowProvider"/>. Used to produce a list of objects. If the operation fails, the incoming Type, and method name will added to Exception.
/// </summary>
/// <typeparam name="T">The type of object represented by the lookup.</typeparam>
/// <param name="dataRowProvider">The <see cref="IDataRowProvider"/> used to submit query.</param>
/// <param name="dataOrder">The information for the query.</param>
/// <param name="converter">A callback used to convert the <see cref="DataRow"/>into an object of type T.</param>
/// <param name="declaringTypeCallback">The callback to define the type to be added to the <see cref="Utilities.OperationResult{T}"/> if faulted.</param>
/// <param name="callingMethod">The callback to define the type to be added to the <see cref="Utilities.OperationResult{T}"/> if faulted.</param>
/// <returns>A <see cref='Task'/> with a result of <see cref="Utilities.OperationResult{T}"/> containing result upon success, and Exceptions upon failure.</returns>
public static Task <OperationResult <List <T> > > GetTableAsync <T>(this IDataRowProvider dataRowProvider, IAliasedCommandTypeDataOrder dataOrder, Func <DataRow, T> converter, Func <Type> declaringTypeCallback, string callingMethod) =>
dataRowProvider.GetTableAsync(dataOrder, (dO, row) => converter(row), declaringTypeCallback, callingMethod);