/// <summary>
/// <see cref="ChangeSet(Of T)"/> の内容を整形します。
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="self"></param>
/// <param name="prepare"></param>
public static void Prepare <T>(this ChangeSet <T> self, Func <ChangeSetItem <T>, ChangeSetItem <T> > prepare) where T : class
{
Contract.NotNull(prepare, "prepare");
var items = new List <ChangeSetItem <T> >();
if (self.Created != null)
{
foreach (var item in self.Created)
{
var state = new ChangeSetItem <T>(item, EntityState.Added);
var newState = prepare(state);
CheckPreparedState(state, newState, items);
}
self.Created.Clear();
}
if (self.Updated != null)
{
foreach (var item in self.Updated)
{
var state = new ChangeSetItem <T>(item, EntityState.Modified);
var newState = prepare(state);
CheckPreparedState(state, newState, items);
}
self.Updated.Clear();
}
if (self.Deleted != null)
{
foreach (var item in self.Deleted)
{
var state = new ChangeSetItem <T>(item, EntityState.Deleted);
var newState = prepare(state);
CheckPreparedState(state, newState, items);
}
self.Deleted.Clear();
}
foreach (var item in items)
{
if (item.State == EntityState.Added)
{
if (self.Created == null)
{
self.Created = new List <T>();
}
self.Created.Add(item.Value);
}
if (item.State == EntityState.Modified)
{
if (self.Updated == null)
{
self.Updated = new List <T>();
}
self.Updated.Add(item.Value);
}
if (item.State == EntityState.Deleted)
{
if (self.Deleted == null)
{
self.Deleted = new List <T>();
}
self.Deleted.Add(item.Value);
}
}
}
