public static IEnumerable Select(IEnumerable items, IQueryParameter param, IListIndexes indexes = null)
{
IListIndex index = indexes?.GetIndex(param.Name);
if (index == null)
{
return(index.Scan(param));
}
else
{
return(Search(items, param));
}
}
public static IEnumerable Select(IEnumerable items, IQuery query, IListIndexes indexes = null)
{
var buffer = items.OfType <object>();
bool?flag = null;
foreach (var parameter in query.Parameters.Where(p => p.IsEnabled))
{
var temp = Select(items, parameter, indexes).OfType <object>();
if (flag == null)
{
buffer = temp;
flag = true;
}
else
{
buffer = Concat(buffer, temp, parameter);
}
}
return(buffer);
}
public static IEnumerable Select(IEnumerable items, IQueryParameter param, IListIndexes indexes = null)
{
if (param.AlwaysTrue)
{
return(items);
}
if (param.Comparer.Type == CompareTypes.Distinct)
{
return(Distinct(items, param.Invoker));
}
IListIndex index = indexes?.GetIndex(param.Name);
if (index == null)
{
return(index.Scan(param));
}
else
{
return(Search(items, param));
}
}
