/// <summary>
/// Adds a middleware to the front of the pipeline.
/// </summary>
/// <param name="middleware">The middleware to add.</param>
public void InsertFirst(ITiffImageDecoderMiddleware middleware)
{
if (middleware is null)
{
throw new ArgumentNullException(nameof(middleware));
}
_middlewares.Insert(0, middleware);
}
/// <summary>
/// Adds a middleware to the end of the pipeline.
/// </summary>
/// <param name="middleware">The middleware to add.</param>
public void Add(ITiffImageDecoderMiddleware middleware)
{
if (middleware is null)
{
throw new ArgumentNullException(nameof(middleware));
}
_middlewares.Add(middleware);
}
public ValueTask RunAsync(TiffImageDecoderContext context)
{
ITiffImageDecoderMiddleware middleware = Middleware;
ITiffImageDecoderPipelineNode?next = Next;
context.CancellationToken.ThrowIfCancellationRequested();
if (next is null)
{
return(middleware.InvokeAsync(context, EmptyImplementation.Instance));
}
else
{
return(middleware.InvokeAsync(context, next));
}
}
public TiffImageDecoderPipelineNode(ITiffImageDecoderMiddleware middleware)
{
Middleware = middleware;
}
