/// <summary>
/// Base implementation to save an instance hierarchy.
/// </summary>
/// <param name="uow">An open unit of work</param>
/// <param name="productInstance">The instance to save</param>
/// <returns>The instance entity.</returns>
private ProductInstanceEntity SaveInstance(IUnitOfWork uow, ProductInstance productInstance)
{
// Check if this type is persisted
var strategy = InstanceStrategies[productInstance.GetType().Name];
if (strategy.SkipInstances)
{
return(null);
}
// Save to entity
var archived = uow.GetEntity <ProductInstanceEntity>(productInstance);
archived.ProductId = productInstance.Type.Id;
strategy.SaveInstance(productInstance, archived);
// Save its parts if the have a dedicated archive
var partsContainer = ReflectionTool.GetReferences <ProductInstance>(productInstance);
foreach (var partGroup in partsContainer)
{
foreach (var part in partGroup)
{
var partEntity = SaveInstance(uow, part);
if (partEntity == null) // Parts are null when they are skipped
{
continue;
}
partEntity.Parent = archived;
partEntity.PartLinkId = part.PartLink.Id;
}
}
return(archived);
}
/// <summary>
/// Recursive function to transform entities into objects
/// </summary>
private void TransformInstance(IUnitOfWork uow, ProductInstanceEntity entity, ProductInstance productInstance)
{
// Transform the instance if it has a dedicated storage
var product = productInstance.Type;
// Check if instances of this type are persisted
var strategy = InstanceStrategies[productInstance.GetType().Name];
if (strategy.SkipInstances)
{
return;
}
// Transfrom entity to instance
strategy.LoadInstance(entity, productInstance);
// Group all parts of the instance by the property they belong to
var partLinks = ReflectionTool.GetReferences <IProductPartLink>(product)
.SelectMany(g => g).ToList();
var partGroups = ReflectionTool.GetReferences <ProductInstance>(productInstance)
.ToDictionary(p => p.Key, p => p.ToList());
var partEntityGroups = entity.Parts.GroupBy(p => p.PartLink.PropertyName)
.ToDictionary(p => p.Key, p => p.ToList());
// Load and populate parts
foreach (var partGroup in partGroups)
{
var linkStrategy = LinkStrategies[product.GetType().Name][partGroup.Key.Name];
if (linkStrategy.PartCreation == PartSourceStrategy.FromPartlink && partEntityGroups.ContainsKey(partGroup.Key.Name))
{
// Update all parts that are also present as entities
foreach (var partEntity in partEntityGroups[partGroup.Key.Name])
{
var part = partGroup.Value.First(p => p.PartLink.Id == partEntity.PartLinkId);
TransformInstance(uow, partEntity, part);
}
}
else if (linkStrategy.PartCreation == PartSourceStrategy.FromEntities)
{
// Load part using the entity and assign PartLink afterwards
var partCollection = partEntityGroups[partGroup.Key.Name].ToList();
var partArticles = TransformArticles(uow, partCollection);
for (var index = 0; index < partArticles.Length; index++)
{
partArticles[index].PartLink = partLinks.Find(pl => pl?.Id == partCollection[index].PartLinkId.Value);
}
if (typeof(ProductInstance).IsAssignableFrom(partGroup.Key.PropertyType) && partArticles.Length == 0)
{
partGroup.Key.SetValue(productInstance, partArticles[0]);
}
else
{
var elementType = partGroup.Key.PropertyType.GetGenericArguments()[0];
var listType = typeof(List <>).MakeGenericType(elementType);
var list = (IList)Activator.CreateInstance(listType);
foreach (var partArticle in partArticles)
{
list.Add(partArticle);
}
}
}
}
}