protected sealed override IEnumerable ToEnumerable(Object state, ClientObjectResolveContext context)
{
if (state == null)
{
throw Logger.Fatal.ArgumentNull(nameof(state));
}
if (context == null)
{
throw Logger.Fatal.ArgumentNull(nameof(context));
}
var enumerables = (state as IEnumerable <TQueryResult>[]);
if (enumerables == null)
{
throw Logger.Fatal.ArgumentNotAssignableTo(
nameof(state),
state,
typeof(IEnumerable <TQueryResult>[])
);
}
return(enumerables.SelectMany(
enumerable => TransformQueryResults(enumerable, context)
));
}
protected virtual IEnumerable <TResult> TransformQueryResults(
IEnumerable <TQueryResult> results,
ClientObjectResolveContext context
)
{
throw Logger.Fatal.NotImplemented();
}
protected sealed override Object Initialize(ClientObjectResolveContext context)
{
var queries = CreateQueries(context);
if (queries == null)
{
return(Enumerable.Empty <TQueryResult>());
}
var collections = queries
.OfType <ClientObjectCollection>()
.ToArray();
if (collections.Any())
{
throw Logger.Fatal.InvalidOperationFormat(
SR.ClientObjectQueryResolveBuilder_CollectionQuery,
GetType(),
nameof(CreateQueries),
typeof(ClientObjectCollection)
);
}
return(queries
.Select(context.LoadQuery)
.ToArray());
}
protected override IEnumerable <T> CreateObjects(ClientObjectResolveContext context)
{
if (context == null)
{
throw Logger.Fatal.ArgumentNull(nameof(context));
}
return(context.ProvisionerContext.GetState <T>());
}
protected sealed override void InitializeContextBeforeParent(ClientObjectResolveContext context)
{
if (context == null)
{
throw Logger.Fatal.ArgumentNull(nameof(context));
}
context.Include(ChildrenExpression);
base.InitializeContextBeforeParent(context);
}
protected sealed override Object Initialize(ClientObjectResolveContext context)
{
if (context == null)
{
throw Logger.Fatal.ArgumentNull(nameof(context));
}
var objects = CreateObjects(context) ?? new TResult[0];
if (objects != null)
{
foreach (var clientObj in objects)
{
context.Load(clientObj);
}
}
return(objects.ToImmutableArray());
}
protected virtual IQueryable <TQueryResult>[] CreateQueries(
ClientObjectResolveContext context
)
=> new[] { CreateQuery(context) };
protected virtual IQueryable <TQueryResult> CreateQuery(
ClientObjectResolveContext context
)
{
throw Logger.Fatal.NotImplemented();
}
protected abstract IEnumerable <TResult> CreateObjects(ClientObjectResolveContext context);
protected sealed override IEnumerable ToEnumerable(Object state, ClientObjectResolveContext context) => (IEnumerable)(state);
protected sealed override IEnumerable <TResult> TransformQueryResults(IEnumerable <TResult> results, ClientObjectResolveContext context) => results;