/// <inheritdoc />
public Task <IEnumerable <T> > FetchAsync <T>(Cql cql)
{
//Use ExecuteAsyncAndAdapt with a delegate to handle the adaptation from RowSet to IEnumerable<T>
_cqlGenerator.AddSelect <T>(cql);
return(ExecuteAsyncAndAdapt(cql, (s, rs) =>
{
var mapper = _mapperFactory.GetMapper <T>(cql.Statement, rs);
return rs.Select(mapper);
}));
}
/// <summary>
/// Adapts a LWT RowSet and returns a new AppliedInfo
/// </summary>
internal static AppliedInfo <T> FromRowSet(MapperFactory mapperFactory, string cql, RowSet rs)
{
var row = rs.FirstOrDefault();
const string appliedColumn = "[applied]";
if (row == null || row.GetColumn(appliedColumn) == null || row.GetValue <bool>(appliedColumn))
{
//The change was applied correctly
return(new AppliedInfo <T>(true));
}
if (rs.Columns.Length == 1)
{
//There isn't more information on why it was not applied
return(new AppliedInfo <T>(false));
}
//It was not applied, map the information returned
var mapper = mapperFactory.GetMapper <T>(cql, rs);
return(new AppliedInfo <T>(mapper(row)));
}
