public CollectionSnapshotLookup TakeCollectionSnapshots(object entity)
{
CollectionSnapshotLookup snapshots = new CollectionSnapshotLookup();
foreach (var configuration in collections.Values)
{
if (configuration.IsValueSource(entity))
{
object collection = configuration.GetCollectionCopy(entity);
snapshots.Add(configuration.Property, collection);
}
}
return(snapshots);
}
internal ICollectionChange <TElement> GetCollectionChanges <TElement>(Expression <Func <TEntity, ICollection <TElement> > > accessor, CollectionSnapshotLookup original, TEntity updated, ElementState state)
{
PropertyInfo property = ChangeDetector.GetProperty(accessor);
return(detector.GetCollectionChanges <TElement>(property, original, updated, state));
}
public ICollectionChange <TElement> GetCollectionChanges <TElement>(PropertyInfo property, CollectionSnapshotLookup original, object updated, ElementState state)
{
ICollectionConfiguration configuration;
if (!collections.TryGetValue(property, out configuration))
{
return(null);
}
var typedConfiguration = (CollectionConfiguration <TElement>)configuration;
var originalCollection = original.GetSnapshot <TElement>(property);
var updatedCollection = typedConfiguration.GetCollection(updated);
CollectionChangeDetector <TElement> detector = new CollectionChangeDetector <TElement>(typedConfiguration.Comparer);
var changeCollection = detector.GetChanges(originalCollection, updatedCollection, state);
return(new CollectionChange <TElement>(property, typedConfiguration.DiplayName, changeCollection));
}
