/// <summary>
/// Read the <see cref="HttpContent"/> as OData resource set.
/// </summary>
/// <param name="content">The http content.</param>
/// <returns>The OData array.</returns>
public static async Task <ODataArray> ReadAsODataArrayAsync(this HttpContent content)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
Stream stream = await content.ReadAsStreamAsync();
using (JsonDocument doc = await JsonDocument.ParseAsync(stream))
{
JsonElement root = doc.RootElement;
// OData array is an object as:
// {
// "@odata.context":...
// "value" [ ... ]
// }
if (root.ValueKind != JsonValueKind.Object)
{
return(null);
}
if (!root.TryGetProperty("value", out JsonElement value) &&
value.ValueKind != JsonValueKind.Array)
{
return(null);
}
ODataArray odataArray = new ODataArray();
// value array
foreach (var item in value.EnumerateArray())
{
IODataValue itemValue = item.ParseAsODataValue();
odataArray.Add(itemValue);
}
// context uri
odataArray.ContextUri = ReadStringPropertyValue(root, "@odata.context", "@context");
// next link
odataArray.NextLink = ReadStringPropertyValue(root, "@odata.nextlink", "@nextlink");
// odata.count
odataArray.TotalCount = ReadIntPropertyValue(root, "@odata.count", "@count");
return(odataArray);
}
}
/// <summary>
/// Read <see cref="JsonElement"/> as OData value.
/// </summary>
/// <param name="node">The JSON element.</param>
/// <returns>The OData value.</returns>
public static IODataValue ParseAsODataValue(this JsonElement node)
{
switch (node.ValueKind)
{
case JsonValueKind.Object: // A JSON object.
ODataObject odataObject = new ODataObject();
foreach (JsonProperty property in node.EnumerateObject())
{
odataObject[property.Name] = ParseAsODataValue(property.Value);
}
return(odataObject);
case JsonValueKind.Array: // A JSON array.
ODataArray odataArray = new ODataArray();
foreach (JsonElement element in node.EnumerateArray())
{
odataArray.Add(ParseAsODataValue(element));
}
return(odataArray);
case JsonValueKind.String: // A JSON string.
return(new ODataString(node.GetString()));
case JsonValueKind.Number: // A JSON number.
return(ReadNumber(node));
case JsonValueKind.True: // A JSON true.
return(ODataBoolean.True);
case JsonValueKind.False: // A JSON false.
return(ODataBoolean.False);
case JsonValueKind.Null: // A JSON null.
return(ODataNull.Null);
case JsonValueKind.Undefined:
default:
throw new ODataException($"Found an Undefined JSON element '{node.GetRawText()}'!");
}
}
