private void BackupProposedValueIfNeeded(DataProperty property, Object oldValue)
{
if (_preproposedValuesMap == null)
{
_preproposedValuesMap = new BackupValuesMap();
}
else
{
if (_preproposedValuesMap.ContainsKey(property.Name))
{
return;
}
}
_preproposedValuesMap.Add(property.Name, oldValue);
}
private void BackupOriginalValueIfNeeded(DataProperty property, Object oldValue)
{
if (_originalValuesMap == null)
{
_originalValuesMap = new BackupValuesMap();
}
else
{
if (_originalValuesMap.ContainsKey(property.Name))
{
return;
}
}
// reference copy of complex object is deliberate - actual original values will be stored in the co itself.
_originalValuesMap.Add(property.Name, oldValue);
}
private ReadOnlyDictionary <String, Object> HandleNull(BackupValuesMap map)
{
return((map ?? BackupValuesMap.Empty).ReadOnlyDictionary);
}