/// <summary>
/// Initializes a new instance of the <see cref="ObjectContent"/> class.
/// </summary>
/// <param name="type">The type of object this instance will contain.</param>
/// <param name="value">The value of the object this instance will contain.</param>
/// <param name="formatter">The formatter to use when serializing the value.</param>
/// <param name="mediaType">The authoritative value of the content's Content-Type header. Can be <c>null</c> in which case the
/// <paramref name="formatter">formatter's</paramref> default content type will be used.</param>
public ObjectContent(Type type, object value, MediaTypeFormatter formatter, MediaTypeHeaderValue mediaType)
{
if (type == null)
{
throw Error.ArgumentNull("type");
}
if (formatter == null)
{
throw Error.ArgumentNull("formatter");
}
if (!formatter.CanWriteType(type))
{
throw Error.InvalidOperation(Properties.Resources.ObjectContent_FormatterCannotWriteType, formatter.GetType().FullName, type.Name);
}
_formatter = formatter;
ObjectType = type;
VerifyAndSetObject(value);
_formatter.SetDefaultContentHeaders(type, Headers, mediaType);
}
public virtual object WriteSampleObjectUsingFormatter(MediaTypeFormatter formatter, object value, Type type, MediaTypeHeaderValue mediaType)
{
if (formatter == null)
{
throw new ArgumentNullException("formatter");
}
if (mediaType == null)
{
throw new ArgumentNullException("mediaType");
}
object sample = String.Empty;
MemoryStream ms = null;
HttpContent content = null;
try
{
if (formatter.CanWriteType(type))
{
ms = new MemoryStream();
content = new ObjectContent(type, value, formatter, mediaType);
formatter.WriteToStreamAsync(type, value, ms, content, null).Wait();
ms.Position = 0;
StreamReader reader = new StreamReader(ms);
string serializedSampleString = reader.ReadToEnd();
if (mediaType.MediaType.ToUpperInvariant().Contains("XML"))
{
serializedSampleString = TryFormatXml(serializedSampleString);
}
else if (mediaType.MediaType.ToUpperInvariant().Contains("JSON"))
{
serializedSampleString = TryFormatJson(serializedSampleString);
}
sample = new TextSample(serializedSampleString);
}
else
{
sample = new InvalidSample(String.Format(
CultureInfo.CurrentCulture,
"Failed to generate the sample for media type '{0}'. Cannot use formatter '{1}' to write type '{2}'.",
mediaType,
formatter.GetType().Name,
type.Name));
}
}
catch (Exception e)
{
sample = new InvalidSample(String.Format(
CultureInfo.CurrentCulture,
"An exception has occurred while using the formatter '{0}' to generate sample for media type '{1}'. Exception message: {2}",
formatter.GetType().Name,
mediaType.MediaType,
UnwrapException(e).Message));
}
finally
{
if (ms != null)
{
ms.Dispose();
}
if (content != null)
{
content.Dispose();
}
}
return(sample);
}