/// <summary>
/// Adds the specified item to the data store.
/// </summary>
/// <param name="item">The data item to add.</param>
/// <param name="identity">Optional, the item's identity.</param>
/// <param name="token">A token with which the task may be cancelled.</param>
/// <returns>The identity value which the item has, after it was added.</returns>
/// <typeparam name="T">The item type.</typeparam>
public async Task <object> AddAsync <T>(T item, object identity = null, CancellationToken token = default(CancellationToken)) where T : class
{
if (identity != null)
{
return(await wrapped.AddAsync <T>(item, identity, token).ConfigureAwait(false));
}
if (item is IEntity entity)
{
identityGenerator.UpdateWithIdentity(entity);
return(await wrapped.AddAsync <T>((T)entity, entity.IdentityValue, token)
.ConfigureAwait(false));
}
return(await wrapped.AddAsync <T>(item, identity, token)
.ConfigureAwait(false));
}
async Task <IIdentity <TEntity> > AddInternalAsync <TEntity>(TEntity entity, CancellationToken token = default(CancellationToken)) where TEntity : class, IEntity
{
var currentIdentity = entity.GetIdentity();
var currentIdentityValue = (currentIdentity != null)? currentIdentity.Value : null;
var newIdentityValue = await persister.AddAsync(entity, currentIdentityValue, token)
.ConfigureAwait(false);
return((newIdentityValue is null) ? null : (IIdentity <TEntity>)idFactory.Create(typeof(TEntity), newIdentityValue));
}