void OrderByFieldsImpl(string[] fieldNames, Func <string, bool> orderFn)
{
var getters = new List <GetMemberDelegate>();
var orderAscs = new List <bool>();
var fields = new List <string>();
foreach (var fieldName in fieldNames)
{
if (string.IsNullOrEmpty(fieldName))
{
continue;
}
var getter = TypeProperties <T> .Instance.GetPublicGetter(fieldName.TrimStart('-'));
if (getter == null)
{
continue;
}
var orderAsc = orderFn(fieldName);
fields.Add(fieldName);
getters.Add(getter);
orderAscs.Add(orderAsc);
}
if (getters.Count > 0)
{
OrderBy = new OrderByExpression(fields.ToArray(), getters.ToArray(), orderAscs.ToArray());
}
}
public virtual IEnumerable <T> ApplySorting(IEnumerable <T> source, OrderByExpression orderBy)
{
return(orderBy != null?orderBy.Apply(source) : source);
}
public virtual void OrderByPrimaryKey()
{
OrderBy = new OrderByExpression(PrimaryKey.Name, TypeProperties <T> .Instance.GetPublicGetter(PrimaryKey));
}
