private static UpdateAction <ManageableUnstructuredMarketDataSnapshot> PrepareUpdateFrom(MarketDataValueSpecification currSpec, IDictionary <string, ValueSnapshot> currValues, MarketDataValueSpecification newSpec, IDictionary <string, ValueSnapshot> newValues)
{
var actions = currValues.ProjectStructure(newValues,
(k, a, b) =>
{
var newMarketValue = b.MarketValue;
return(new UpdateAction <ManageableUnstructuredMarketDataSnapshot>(delegate(ManageableUnstructuredMarketDataSnapshot s)
{
s._values[currSpec][k].MarketValue = newMarketValue;
}));
},
(k, v) => PrepareRemoveAction(currSpec, k, v),
(k, v) =>
{
var valueSnapshot = v.Clone();
return(new UpdateAction <ManageableUnstructuredMarketDataSnapshot>(
delegate(ManageableUnstructuredMarketDataSnapshot s)
{
s._values[currSpec].Add(k, valueSnapshot.Clone());
s.InvokePropertyChanged("Values");
}));
});
UpdateAction <ManageableUnstructuredMarketDataSnapshot> ret = UpdateAction <ManageableUnstructuredMarketDataSnapshot> .Create(actions);
if (!currSpec.Equals(newSpec))
{//we need to update the key, since we used a non standard comparer
ret = ret.Concat(
new UpdateAction <ManageableUnstructuredMarketDataSnapshot>(delegate(ManageableUnstructuredMarketDataSnapshot s)
{
var prevValue = s._values[currSpec];
s.Values[newSpec] = prevValue;
s._values.Remove(currSpec);
s.InvokePropertyChanged("Values");
})
);
}
return(ret);
}