public ICommitContext Fill(IValueSource valueSource, Func <IValueSource, MappedObjectKeys> getKeyFunction, Func <T> createObject)
{
lock (_cache)
{
Init(true);
CommitContext commitContext = new CommitContext(this);
while (valueSource.Next())
{
MappedObjectKeys keys = getKeyFunction(valueSource);
if (_cache._itemsByKey.ContainsKey(keys))
{
IFillAbleObject item = _cache._itemsByKey[keys].Value;
if (item == null)
{
_cache._itemsByKey[keys] = new WeakReference <IFillAbleObject>(item = (IFillAbleObject)createObject());
((System.ComponentModel.INotifyPropertyChanged)item).PropertyChanged += _cache.EntryValuePropertyChanged;
}
item.Fill(valueSource);
commitContext.AddEntryToCommit((T)item);
}
else
{
IFillAbleObject newObject = (IFillAbleObject)createObject();
newObject.Fill(valueSource);
_cache._itemsByKey.Add(keys, new WeakReference <IFillAbleObject>(newObject));
commitContext.AddEntryToCommit((T)newObject);
((System.ComponentModel.INotifyPropertyChanged)newObject).PropertyChanged += _cache.EntryValuePropertyChanged;
}
}
return(commitContext);
}
}
private void AppendEntry(T item)
{
Init(false);
IFillAbleObject fillableObject = (IFillAbleObject)item;
if (fillableObject.State == State.Deleted)
{
lock (_deletedItems)
{
if (_deletedItems.Contains(item))
{
return;
}
_deletedItems.Add(item);
}
((System.ComponentModel.INotifyPropertyChanged)item).PropertyChanged += ItemsNotifyPropertyChanged;
}
else
{
lock (_items)
{
if (_items.Contains(item))
{
return;
}
((System.ComponentModel.INotifyPropertyChanged)item).PropertyChanged += ItemsNotifyPropertyChanged;
if (_context.OrderExpressions == null || _context.OrderExpressions.Count == 0)
{
InsertAt(_items.Count, item);
}
else
{
#region Ordered Insert
if (_items.Count == 0)
{
InsertAt(0, item);
_expectedNextInsertIndex = 1;
}
else if (
(_items.Count == _expectedNextInsertIndex && _context.Compare(item, _items[_expectedNextInsertIndex - 1]) >= 0) ||
(_expectedNextInsertIndex == 0 && _context.Compare(item, _items[0]) <= 0) ||
(_expectedNextInsertIndex < _items.Count && _expectedNextInsertIndex > 0 &&
_context.Compare(item, _items[_expectedNextInsertIndex]) <= 0 &&
_context.Compare(item, _items[_expectedNextInsertIndex - 1]) >= 0)
)
{
InsertAt(_expectedNextInsertIndex++, item);
}
else
{
void binarySearch(int min, int max)
{
int spread = max - min;
if (spread == 0)
{
InsertAt(_expectedNextInsertIndex = (_context.Compare(item, _items[min]) < 0 ? min : ++min), item);
}
else if (spread == 1)
{
InsertAt(_expectedNextInsertIndex = (_context.Compare(item, _items[min]) < 0 ? min : _context.Compare(item, _items[max]) < 0 ? max : ++max), item);
}
else
{
int mid = min + (spread / 2);
int compare = _context.Compare(item, _items[mid]);
if (compare == 0)
{
InsertAt(_expectedNextInsertIndex = mid, item);
}
else if (compare > 0)
{
binarySearch(mid, max);
}
else
{
binarySearch(min, mid);
}
}
}
binarySearch(0, _items.Count - 1);
}
#endregion
}
}
}
}
public void ReportEntryValueChanged(IFillAbleObject item)
{
if (_disableReportEntryValueChanged)
{
return;
}
Init(false);
T obj = (T)item;
bool match;
try
{
match = _context.GetPredicateCompiled()(obj);
}
#if DEBUG && !NETCOREAPP1_0
catch (Exception ex)
{
if (!_isWeakCacheExceptionSent)
{
_isWeakCacheExceptionSent = true;
System.Diagnostics.Trace.TraceError("Error while evaluating Predicate in PropertyChanged event. Predicate: {0}\nException:\n{1}", _context.GetPredicate(), ex);
}
else
{
throw;
}
#else
catch
{
#endif
match = false;
}
bool contains = item.State == State.Deleted ? _deletedItems.Contains(obj) : _items.Contains(obj);
if (match && !contains)
{
AppendEntry(obj);
}
else if (!match && contains)
{
if (((IFillAbleObject)item).State == State.Deleted)
{
if (_deletedItems.Remove(obj))
{
((System.ComponentModel.INotifyPropertyChanged)item).PropertyChanged -= ItemsNotifyPropertyChanged;
}
return;
}
else
{
int index = _items.IndexOf(obj);
if (index == -1)
{
return;
}
_items.RemoveAt(index);
((System.ComponentModel.INotifyPropertyChanged)item).PropertyChanged -= ItemsNotifyPropertyChanged;
OnCollectionChanged(new System.Collections.Specialized.NotifyCollectionChangedEventArgs(System.Collections.Specialized.NotifyCollectionChangedAction.Remove, item, index));
}
}
}
