Ejemplo n.º 1
0
        /// <summary>
        /// Asynchronously loads a <see cref="JConstructor"/> from a <see cref="JsonReader"/>.
        /// </summary>
        /// <param name="reader">A <see cref="JsonReader"/> that will be read for the content of the <see cref="JConstructor"/>.</param>
        /// <param name="settings">The <see cref="JsonLoadSettings"/> used to load the JSON.
        /// If this is <c>null</c>, default load settings will be used.</param>
        /// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="CancellationToken.None"/>.</param>
        /// <returns>
        /// A <see cref="Task{TResult}"/> that represents the asynchronous load. The <see cref="Task{TResult}.Result"/>
        /// property returns a <see cref="JConstructor"/> that contains the JSON that was read from the specified <see cref="JsonReader"/>.</returns>
        public new static async Task <JConstructor> LoadAsync(JsonReader reader, JsonLoadSettings settings, CancellationToken cancellationToken = default)
        {
            if (reader.TokenType == JsonToken.None)
            {
                if (!await reader.ReadAsync(cancellationToken).ConfigureAwait(false))
                {
                    throw JsonReaderException.Create(reader, "Error reading JConstructor from JsonReader.");
                }
            }

            await reader.MoveToContentAsync(cancellationToken).ConfigureAwait(false);

            if (reader.TokenType != JsonToken.StartConstructor)
            {
                throw JsonReaderException.Create(reader, "Error reading JConstructor from JsonReader. Current JsonReader item is not a constructor: {0}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
            }

            JConstructor c = new JConstructor((string)reader.Value);

            c.SetLineInfo(reader as IJsonLineInfo, settings);

            await c.ReadTokenFromAsync(reader, settings, cancellationToken).ConfigureAwait(false);

            return(c);
        }
Ejemplo n.º 2
0
        private async Task ReadContentFromAsync(JsonReader reader, JsonLoadSettings settings, CancellationToken cancellationToken = default)
        {
            IJsonLineInfo lineInfo = reader as IJsonLineInfo;

            JContainer parent = this;

            do
            {
                if (parent is JProperty p && p.Value != null)
                {
                    if (parent == this)
                    {
                        return;
                    }

                    parent = parent.Parent;
                }

                switch (reader.TokenType)
                {
                case JsonToken.None:
                    // new reader. move to actual content
                    break;

                case JsonToken.StartArray:
                    JArray a = new JArray();
                    a.SetLineInfo(lineInfo, settings);
                    parent.Add(a);
                    parent = a;
                    break;

                case JsonToken.EndArray:
                    if (parent == this)
                    {
                        return;
                    }

                    parent = parent.Parent;
                    break;

                case JsonToken.StartObject:
                    JObject o = new JObject();
                    o.SetLineInfo(lineInfo, settings);
                    parent.Add(o);
                    parent = o;
                    break;

                case JsonToken.EndObject:
                    if (parent == this)
                    {
                        return;
                    }

                    parent = parent.Parent;
                    break;

                case JsonToken.StartConstructor:
                    JConstructor constructor = new JConstructor(reader.Value.ToString());
                    constructor.SetLineInfo(lineInfo, settings);
                    parent.Add(constructor);
                    parent = constructor;
                    break;

                case JsonToken.EndConstructor:
                    if (parent == this)
                    {
                        return;
                    }

                    parent = parent.Parent;
                    break;

                case JsonToken.String:
                case JsonToken.Integer:
                case JsonToken.Float:
                case JsonToken.Date:
                case JsonToken.Boolean:
                case JsonToken.Bytes:
                    JValue v = new JValue(reader.Value);
                    v.SetLineInfo(lineInfo, settings);
                    parent.Add(v);
                    break;

                case JsonToken.Comment:
                    if (settings != null && settings.CommentHandling == CommentHandling.Load)
                    {
                        v = JValue.CreateComment(reader.Value.ToString());
                        v.SetLineInfo(lineInfo, settings);
                        parent.Add(v);
                    }
                    break;

                case JsonToken.Null:
                    v = JValue.CreateNull();
                    v.SetLineInfo(lineInfo, settings);
                    parent.Add(v);
                    break;

                case JsonToken.Undefined:
                    v = JValue.CreateUndefined();
                    v.SetLineInfo(lineInfo, settings);
                    parent.Add(v);
                    break;

                case JsonToken.PropertyName:
                    JProperty property = ReadProperty(reader, settings, lineInfo, parent);
                    if (property != null)
                    {
                        parent = property;
                    }
                    else
                    {
                        await reader.SkipAsync();
                    }
                    break;

                default:
                    throw new InvalidOperationException("The JsonReader should not be on a token of type {0}.".FormatWith(CultureInfo.InvariantCulture, reader.TokenType));
                }
            } while (await reader.ReadAsync(cancellationToken).ConfigureAwait(false));
        }