/// <summary>
/// Listen to entity change using a custom listener implementation.
/// </summary>
public static void Listen(IEntity entity, EntityIdListener listener)
{
// If id is already set, take a shortcut and assign directly
if (entity.Id > 0)
{
listener.AssignId(entity.Id);
}
else
{
entity.IdChanged += listener.IdChanged;
}
}
/// <summary>
/// Get or create an entity for a business object
/// </summary>
/// <param name="unitOfWork">An open database unit of work</param>
/// <param name="obj">The business object</param>
/// <typeparam name="TEntity">The entity type to use</typeparam>
public static TEntity GetEntity <TEntity>(this IUnitOfWork unitOfWork, IPersistentObject obj)
where TEntity : class, IEntity
{
var repository = unitOfWork.GetRepository <IRepository <TEntity> >();
var entity = repository.GetByKey(obj.Id);
if (entity == null)
{
entity = repository.Create();
EntityIdListener.Listen(entity, obj);
}
return(entity);
}
/// <summary>
/// Get or create an entity for a business object
/// </summary>
/// <param name="dbSet">An open database set</param>
/// <param name="obj">The business object</param>
/// <typeparam name="TEntity">The entity type to use</typeparam>
public static TEntity GetEntity <TEntity>(this IDbSet <TEntity> dbSet, IPersistentObject obj)
where TEntity : class, IEntity
{
var entity = dbSet.FirstOrDefault(e => e.Id == obj.Id);
if (entity != null)
{
return(entity);
}
entity = dbSet.Create();
dbSet.Add(entity);
EntityIdListener.Listen(entity, obj);
return(entity);
}