protected override async Task <IVh <StreamInfo> > GetSourceStreamAsync(ISubjectLoadContext ctx)
{
ctx.EnsureNotNull(nameof(ctx));
//
await Task.CompletedTask;
//
Stream sourceStream = default;
try {
sourceStream = ResourceUtilities.RequireManifestResourceStream(uri: ctx.BaseUri.ArgProp($"{nameof(ctx)}.{nameof(ctx.BaseUri)}"), resourceName: out var resourceName);
string mediaType;
if (resourceName.EndsWith(value: DescriptionPackageConstants.PackageXmlFormatFileExtension, comparisonType: StringComparison.OrdinalIgnoreCase))
{
mediaType = MediaTypeNameUtilities.AppXml;
}
else if (resourceName.EndsWith(value: DescriptionPackageConstants.PackageJsonFormatFileExtension, comparisonType: StringComparison.OrdinalIgnoreCase))
{
mediaType = MediaTypeNameUtilities.AppJson;
}
else
{
mediaType = default;
}
return(new StreamInfo(stream: sourceStream, ownsStream: true, contentMediaType: mediaType).ToValueHolder(ownsValue: true));
}
catch {
sourceStream?.Dispose();
throw;
}
}
// TODO: Put strings into the resources.
//
protected virtual async Task <TSubject> DoMaterializeAsync(ISubjectLoadContext ctx, StreamInfo stream)
{
ctx.EnsureNotNull(nameof(ctx));
stream.EnsureNotNull(nameof(stream));
//
await Task.CompletedTask;
TSubject subject;
var deserializedObjectAsIDisposable = default(IDisposable);
try {
object deserializedObject;
if (IsJsonMediaType(mediaTypeName: stream.ContentMediaType))
{
// JSON.
//
var jsonSerializer = ctx.CreateJsonSerializer();
using (var textReader = new StreamReader(stream.Stream, Encoding.UTF8, true, TextReaderWriterUtilities.DefaultBufferSize, true))
using (var jsonReader = new JsonTextReader(textReader))
deserializedObjectAsIDisposable = (deserializedObject = jsonSerializer.Deserialize(jsonReader)) as IDisposable;
}
else if (IsXmlMediaType(mediaTypeName: stream.ContentMediaType))
{
// XML.
//
var xmlObjectSerializer = ctx.CreateXmlObjectSerializer(type: typeof(object));
using (var xmlReader = XmlReader.Create(input: stream.Stream, settings: ctx.CreateXmlReaderSettings().CopyWith(closeInput: false)))
deserializedObjectAsIDisposable = (deserializedObject = xmlObjectSerializer.ReadObject(xmlReader, false)) as IDisposable;
}
else
{
throw new NotSupportedException($"Медиа-тип содержимого потока не поддерживается.{Environment.NewLine}\tМедиа-тип:{stream.ContentMediaType.FmtStr().GNLI2()}");
}
//
subject = deserializedObject as TSubject;
if (subject is null && !(deserializedObject is null))
{
throw new EonException(message: $"Десериализованный объект имеет тип, не совместимый с требуемым.{Environment.NewLine}\tТип десериализованного объекта:{deserializedObject.GetType().FmtStr().GNLI2()}{Environment.NewLine}\tТребуемый тип:{typeof(TSubject).FmtStr().GI2()}.");
}
//
return(subject);
}
catch (Exception exception) {
DisposeMany(exception: exception, disposables: deserializedObjectAsIDisposable);
throw;
}
}