public void ValidateConsistency()
{
IList <TOuterSourceItem> outerSource = _outerSourceScalar.getValue(_outerSource, new ObservableCollection <TOuterSourceItem>()) as IList <TOuterSourceItem>;
IList <TInnerSourceItem> innerSource = _innerSourceScalar.getValue(_innerSource, new ObservableCollection <TInnerSourceItem>()) as IList <TInnerSourceItem>;
int index = 0;
// ReSharper disable once PossibleNullReferenceException
for (int index1 = 0; index1 < outerSource.Count; index1++)
{
TOuterSourceItem sourceOuterItem = outerSource[index1];
// ReSharper disable once PossibleNullReferenceException
for (int index2 = 0; index2 < innerSource.Count; index2++)
{
TInnerSourceItem sourceInnerItem = innerSource[index2];
JoinPair <TOuterSourceItem, TInnerSourceItem> joinPair = this[index];
if (!EqualityComparer <TOuterSourceItem> .Default.Equals(joinPair.OuterItem, sourceOuterItem))
{
throw new ObservableComputationsException(this, "Consistency violation: Crossing.1");
}
if (!EqualityComparer <TInnerSourceItem> .Default.Equals(joinPair.InnerItem, sourceInnerItem))
{
throw new ObservableComputationsException(this, "Consistency violation: Crossing.2");
}
index++;
}
}
// ReSharper disable once PossibleNullReferenceException
if (Count != outerSource.Count * innerSource.Count)
{
throw new ObservableComputationsException(this, "Consistency violation: Crossing.3");
}
}
private void handleInnerSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
checkConsistent(sender, e);
_handledEventSender = sender;
_handledEventArgs = e;
if (_innerSourceIndexerPropertyChangedEventRaised || _lastProcessedInnerSourceChangeMarker != _innerSourceAsObservableCollectionWithChangeMarker.ChangeMarkerField)
{
_innerSourceIndexerPropertyChangedEventRaised = false;
_lastProcessedInnerSourceChangeMarker = !_lastProcessedInnerSourceChangeMarker;
_isConsistent = false;
int newIndex;
int oldIndex;
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
//if (e.NewItems.Count > 1) throw new ObservableComputationsException(this, "Adding of multiple items is not supported");
newIndex = e.NewStartingIndex;
TInnerSourceItem sourceInnerItem = _innerSourceAsList[newIndex];
int index1 = newIndex;
int outerSourceCount1 = _outerSourceAsList.Count;
int innerSourceCount1 = _innerSourceAsList.Count;
for (int outerSourceIndex = 0; outerSourceIndex < outerSourceCount1; outerSourceIndex++)
{
TOuterSourceItem sourceOuterItem = _outerSourceAsList[outerSourceIndex];
JoinPair <TOuterSourceItem, TInnerSourceItem> joinPair = new JoinPair <TOuterSourceItem, TInnerSourceItem>(
sourceOuterItem, sourceInnerItem);
baseInsertItem(index1, joinPair);
index1 = index1 + innerSourceCount1;
}
break;
case NotifyCollectionChangedAction.Remove:
//if (e.OldItems.Count > 1) throw new ObservableComputationsException(this, "Removing of multiple items is not supported");
oldIndex = e.OldStartingIndex;
int outerSourceCount3 = _outerSourceAsList.Count;
int oldInnerSourceCount = _innerSourceAsList.Count + 1;
int baseIndex = (outerSourceCount3 - 1) * oldInnerSourceCount;
for (int outerSourceIndex = outerSourceCount3 - 1; outerSourceIndex >= 0; outerSourceIndex--)
{
baseRemoveItem(baseIndex + oldIndex);
baseIndex = baseIndex - oldInnerSourceCount;
}
break;
case NotifyCollectionChangedAction.Replace:
//if (e.NewItems.Count > 1) throw new ObservableComputationsException(this, "Replacing of multiple items is not supported");
newIndex = e.NewStartingIndex;
TInnerSourceItem sourceItem3 = _innerSourceAsList[newIndex];
int index2 = newIndex;
int outerSourceCount2 = _outerSourceAsList.Count;
int innerSourceCount2 = _innerSourceAsList.Count;
for (int outerSourceIndex = 0; outerSourceIndex < outerSourceCount2; outerSourceIndex++)
{
this[index2].setInnerItem(sourceItem3);
index2 = index2 + innerSourceCount2;
}
break;
case NotifyCollectionChangedAction.Move:
newIndex = e.NewStartingIndex;
oldIndex = e.OldStartingIndex;
if (newIndex != oldIndex)
{
int index = 0;
int outerSourceCount = _outerSourceAsList.Count;
int innerSourceCount = _innerSourceAsList.Count;
for (int outerSourceIndex = 0; outerSourceIndex < outerSourceCount; outerSourceIndex++)
{
baseMoveItem(index + oldIndex, index + newIndex);
index = index + innerSourceCount;
}
}
break;
case NotifyCollectionChangedAction.Reset:
initializeFromSources();
break;
}
_isConsistent = true;
raiseConsistencyRestored();
}
_handledEventSender = null;
_handledEventArgs = null;
}
private void initializeFromSources()
{
if (_outerSourceNotifyCollectionChangedEventHandler != null)
{
_outerSource.CollectionChanged -= _outerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_outerSourceNotifyCollectionChangedEventHandler = null;
_outerSourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_innerSourceNotifyCollectionChangedEventHandler != null)
{
_innerSource.CollectionChanged -= _innerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_innerSourceNotifyCollectionChangedEventHandler = null;
_innerSourceWeakNotifyCollectionChangedEventHandler = null;
}
if (_innerSourceAsINotifyPropertyChanged != null)
{
_innerSourceAsINotifyPropertyChanged.PropertyChanged -=
_innerSourceWeakPropertyChangedEventHandler.Handle;
_innerSourceAsINotifyPropertyChanged = null;
_innerSourcePropertyChangedEventHandler = null;
_innerSourceWeakPropertyChangedEventHandler = null;
}
if (_outerSourceAsINotifyPropertyChanged != null)
{
_outerSourceAsINotifyPropertyChanged.PropertyChanged -=
_outerSourceWeakPropertyChangedEventHandler.Handle;
_outerSourceAsINotifyPropertyChanged = null;
_outerSourcePropertyChangedEventHandler = null;
_outerSourceWeakPropertyChangedEventHandler = null;
}
if (_outerSource != null || _innerSource != null)
{
baseClearItems();
}
if (_outerSourceScalar != null)
{
_outerSource = _outerSourceScalar.Value;
}
_outerSourceAsList = (IList <TOuterSourceItem>)_outerSource;
if (_innerSourceScalar != null)
{
_innerSource = _innerSourceScalar.Value;
}
_innerSourceAsList = (IList <TInnerSourceItem>)_innerSource;
if (_outerSource != null && _innerSource != null)
{
_outerSourceAsObservableCollectionWithChangeMarker = _outerSourceAsList as ObservableCollectionWithChangeMarker <TOuterSourceItem>;
if (_outerSourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedOuterSourceChangeMarker = _outerSourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_outerSourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_outerSource;
_outerSourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_outerSourceIndexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_outerSourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_outerSourcePropertyChangedEventHandler);
_outerSourceAsINotifyPropertyChanged.PropertyChanged +=
_outerSourceWeakPropertyChangedEventHandler.Handle;
}
_innerSourceAsObservableCollectionWithChangeMarker = _innerSourceAsList as ObservableCollectionWithChangeMarker <TInnerSourceItem>;
if (_innerSourceAsObservableCollectionWithChangeMarker != null)
{
_lastProcessedInnerSourceChangeMarker = _innerSourceAsObservableCollectionWithChangeMarker.ChangeMarkerField;
}
else
{
_innerSourceAsINotifyPropertyChanged = (INotifyPropertyChanged)_innerSource;
_innerSourcePropertyChangedEventHandler = (sender, args) =>
{
if (args.PropertyName == "Item[]")
{
_innerSourceIndexerPropertyChangedEventRaised = true; // ObservableCollection raises this before CollectionChanged event raising
}
};
_innerSourceWeakPropertyChangedEventHandler =
new WeakPropertyChangedEventHandler(_innerSourcePropertyChangedEventHandler);
_innerSourceAsINotifyPropertyChanged.PropertyChanged +=
_innerSourceWeakPropertyChangedEventHandler.Handle;
}
// ReSharper disable once PossibleNullReferenceException
int outerSourceCount = _outerSourceAsList.Count;
// ReSharper disable once PossibleNullReferenceException
int innerSourceCount = _innerSourceAsList.Count;
int baseIndex = 0;
for (int outerSourceIndex = 0; outerSourceIndex < outerSourceCount; outerSourceIndex++)
{
TOuterSourceItem sourceOuterItem = _outerSourceAsList[outerSourceIndex];
for (int innerSourceIndex = 0; innerSourceIndex < innerSourceCount; innerSourceIndex++)
{
TInnerSourceItem sourceInnerItem = _innerSourceAsList[innerSourceIndex];
JoinPair <TOuterSourceItem, TInnerSourceItem> joinPair = new JoinPair <TOuterSourceItem, TInnerSourceItem>(
sourceOuterItem, sourceInnerItem);
baseInsertItem(baseIndex + innerSourceIndex, joinPair);
}
baseIndex = baseIndex + innerSourceCount;
}
_outerSourceNotifyCollectionChangedEventHandler = handleOuterSourceCollectionChanged;
_outerSourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_outerSourceNotifyCollectionChangedEventHandler);
_outerSource.CollectionChanged += _outerSourceWeakNotifyCollectionChangedEventHandler.Handle;
_innerSourceNotifyCollectionChangedEventHandler = handleInnerSourceCollectionChanged;
_innerSourceWeakNotifyCollectionChangedEventHandler =
new WeakNotifyCollectionChangedEventHandler(_innerSourceNotifyCollectionChangedEventHandler);
_innerSource.CollectionChanged += _innerSourceWeakNotifyCollectionChangedEventHandler.Handle;
}
}
