public async ValueTask <IShape> CreateAsync(string shapeType, Func <ValueTask <IShape> > shapeFactory)
{
var shapeTable = _shapeTableManager.GetShapeTable();
var descriptors = shapeTable.Descriptors;
var creatingContext = new ShapeCreatingContext
{
ServiceProvider = _serviceProvider,
New = this,
ShapeFactory = this,
ShapeType = shapeType,
OnCreated = new List <Func <ShapeCreatedContext, Task> >(),
CreateAsync = shapeFactory
};
if (descriptors.TryGetValue(shapeType, out var shapeDescriptor))
{
// "Creating" events may add behaviors and alter base type.
foreach (var ev in shapeDescriptor.CreatingAsync)
{
await ev(creatingContext);
}
}
// Create the new instance.
var createdContext = new ShapeCreatedContext(
_serviceProvider,
creatingContext.New,
creatingContext.ShapeFactory,
creatingContext.ShapeType,
await creatingContext.CreateAsync());
var shape = createdContext.Shape;
if (shape == null)
{
throw new InvalidOperationException(
$"Invalid base type for shape: {createdContext.Shape.GetType()}");
}
var shapeMetadata = shape.Metadata;
shapeMetadata.Type = shapeType;
if (shapeDescriptor != null)
{
foreach (var ev in shapeDescriptor.CreatedAsync)
{
await ev(createdContext);
}
}
foreach (var ev in creatingContext.OnCreated)
{
await ev(createdContext);
}
return(shape);
}
public void Creating(ShapeCreatingContext context)
{
}
public void Creating(ShapeCreatingContext context)
{
}
public override void Creating(ShapeCreatingContext context)
{
context.Behaviors.Add(new Behavior());
}