public override MList <S> GetValue(MappingContext <MList <S> > ctx)
{
using (HeavyProfiler.LogNoStackTrace("GetValue", () => "MListMapping<{0}>".FormatWith(typeof(S).TypeName())))
{
if (ctx.Empty())
{
return(ctx.None());
}
IMListPrivate <S> mlistPriv = ctx.Value;
var dic = mlistPriv == null ? new Dictionary <PrimaryKey, MList <S> .RowIdElement>() :
mlistPriv.InnerList.Where(a => a.RowId.HasValue).ToDictionary(a => a.RowId.Value, a => a);
var newList = new List <MList <S> .RowIdElement>();
foreach (MappingContext <S> itemCtx in GenerateItemContexts(ctx))
{
Debug.Assert(!itemCtx.Empty());
string rowIdString = (itemCtx.Inputs.ContainsKey(EntityListBaseKeys.RowId)? itemCtx.Inputs[EntityListBaseKeys.RowId]:null);
if (rowIdString.HasText())
{
var rowId = new PrimaryKey((IComparable)ReflectionTools.Parse(rowIdString, GetRowIdType(ctx)));
var oldValue = dic.GetOrThrow(rowId, "No RowID {0} found");
itemCtx.Value = oldValue.Element;
itemCtx.Value = ElementMapping(itemCtx);
ctx.AddChild(itemCtx);
if (itemCtx.Value != null)
{
var val = itemCtx.SupressChange ? oldValue.Element : itemCtx.Value;
if (oldValue.Element.Equals(val))
{
newList.Add(new MList <S> .RowIdElement(val, rowId, oldValue.OldIndex));
}
else
{
newList.Add(new MList <S> .RowIdElement(val));
}
}
}
else
{
itemCtx.Value = ElementMapping(itemCtx);
ctx.AddChild(itemCtx);
if (itemCtx.Value != null && !itemCtx.SupressChange)
{
newList.Add(new MList <S> .RowIdElement(itemCtx.Value));
}
}
}
if (!AreEqual(newList, mlistPriv == null ? null : mlistPriv.InnerList))
{
Signum.Web.Mapping.AssertCanChange(ctx.PropertyRoute);
if (ctx.Value == null)
{
mlistPriv = ctx.Value = new MList <S>();
}
var added = newList.Select(a => a.Element).Except(mlistPriv.InnerList.Select(a => a.Element)).ToList();
var removed = mlistPriv.InnerList.Select(a => a.Element).Except(newList.Select(a => a.Element)).ToList();
mlistPriv.InnerList.Clear();
mlistPriv.InnerList.AddRange(newList);
mlistPriv.InnerListModified(added, removed);
}
return(ctx.Value);
}
}
public abstract T GetValue(MappingContext <T> mapping);
private static bool AnyNonSpecialImput(MappingContext <Lite <S> > ctx)
{
return(ctx.Inputs.Keys.Except(Mapping.specialProperties).Any());
}