private static void ProcessModifiedEntity(List <ModifiedObjectMetadata> modifyObjectsMetada, InternalEntityEntry entityEntry, ChangeTracker changeTracker)
{
ModifiedObjectMetadata modifyObjectMetada = GetOrCreateMetaData(modifyObjectsMetada, entityEntry.Entity);
IEnumerable <PropertyEntry> properties = entityEntry.GetProperties();
ProcessProperties(entityEntry.Entity, modifyObjectMetada, properties);
ProcessNavigations(entityEntry, modifyObjectsMetada, modifyObjectMetada, properties, changeTracker);
}
private static ModifiedObjectMetadata GetOrCreateMetaData(List <ModifiedObjectMetadata> modifiedObjectMetadataList, object targetObject)
{
ModifiedObjectMetadata modifiedObjectMetadata = modifiedObjectMetadataList.FirstOrDefault(p => Equals(p.Object, targetObject));
if (modifiedObjectMetadata == null)
{
modifiedObjectMetadata = new ModifiedObjectMetadata(targetObject);
modifiedObjectMetadataList.Add(modifiedObjectMetadata);
}
return(modifiedObjectMetadata);
}
private static void ProcessPrincipalEntity(InternalEntityEntry entityEntry, List <ModifiedObjectMetadata> modifyObjectsMetada, IForeignKey foreignKey, InternalEntityEntry principaEntityEntry)
{
ModifiedObjectMetadata modifyObjectMetadaNavigation = GetOrCreateMetaData(modifyObjectsMetada, principaEntityEntry.Entity);
IEnumerable <INavigation> findNavigationsTo = foreignKey.FindNavigationsFrom(principaEntityEntry.EntityType);
foreach (var entityNavigation in findNavigationsTo)
{
if (!modifyObjectMetadaNavigation.NavigationProperties.Contains(entityNavigation.Name))
{
modifyObjectMetadaNavigation.NavigationProperties.Add(entityNavigation.Name);
}
}
}
private static void ProcessProperties(object targetObject, ModifiedObjectMetadata modifiedObjectMetadata, IEnumerable <PropertyEntry> properties)
{
foreach (PropertyEntry propertyEntry in properties)
{
if (propertyEntry.IsModified)
{
if (propertyEntry.Metadata.IsKeyOrForeignKey())
{
continue;
}
modifiedObjectMetadata.Properties.Add(propertyEntry.Metadata.Name, propertyEntry.CurrentValue);
}
}
}
private static void ProcessNavigations(InternalEntityEntry entityEntry, List <ModifiedObjectMetadata> modifyObjectsMetada, ModifiedObjectMetadata modifyObjectMetada, IEnumerable <PropertyEntry> properties, ChangeTracker changeTracker)
{
IEnumerable <IForeignKey> foreignKeys = entityEntry.EntityType.GetForeignKeys();
foreach (IForeignKey foreignKey in foreignKeys)
{
for (int i = 0; i < foreignKey.Properties.Count(); i++)
{
PropertyEntry propertyEntry = properties.First(p => p.Metadata.Name == foreignKey.Properties[0].Name);
if (!propertyEntry.IsModified && entityEntry.EntityState != EntityState.Added)
{
continue;
}
modifyObjectMetada.ForeignKeys.Add(propertyEntry.Metadata.Name, propertyEntry.CurrentValue);
IEnumerable <INavigation> findNavigationsToForeign = foreignKey.FindNavigationsFrom(entityEntry.EntityType);
foreach (INavigation nav in findNavigationsToForeign)
{
modifyObjectMetada.NavigationProperties.Add(nav.Name);
}
InternalEntityEntry principaEntityEntryOriginalValue = changeTracker.GetPrincipaEntityEntryOriginalValue(entityEntry, foreignKey);
if (principaEntityEntryOriginalValue != null)
{
ProcessPrincipalEntity(entityEntry, modifyObjectsMetada, foreignKey, principaEntityEntryOriginalValue);
}
InternalEntityEntry principaEntityEntryCurrentValue = changeTracker.GetPrincipalEntityEntryCurrentValue(entityEntry, foreignKey);
if (principaEntityEntryCurrentValue != null)
{
ProcessPrincipalEntity(entityEntry, modifyObjectsMetada, foreignKey, principaEntityEntryCurrentValue);
}
}
}
}
