/// <summary>
/// Wraps this message part's original data stream in another stream returned by the <paramref name="wrapper"/>
/// delegate.
/// </summary>
/// <param name="messagePart">
/// The part whose original data stream is wrapped.
/// </param>
/// <param name="wrapper">
/// A delegate, or stream factory, that returns the stream wrapping the original one.
/// </param>
/// <param name="tracker">
/// Pipeline's resource tracker to which to report the newly created wrapping stream.
/// </param>
/// <returns>
/// The new wrapping <see cref="Stream"/> if it is not the same instance as the original one. The original <see
/// cref="Stream"/> otherwise.
/// </returns>
public static T WrapOriginalDataStream <T>(this IBaseMessagePart messagePart, Func <Stream, T> wrapper, IResourceTracker tracker) where T : Stream
{
// TODO ?consider providing an overload when there is no IResourceTracker as this is necessary only for unmanaged objects/resources?
if (messagePart == null)
{
throw new ArgumentNullException("messagePart");
}
if (wrapper == null)
{
throw new ArgumentNullException("wrapper");
}
if (tracker == null)
{
throw new ArgumentNullException("tracker");
}
var originalDataStream = messagePart.GetOriginalDataStream();
if (originalDataStream == null)
{
return(null);
}
var wrappingStream = wrapper(originalDataStream);
if (ReferenceEquals(originalDataStream, wrappingStream))
{
return((T)originalDataStream);
}
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Wrapping message part's original data stream in a '{0}' stream.", wrappingStream.GetType().FullName);
}
messagePart.SetDataStream(wrappingStream, tracker);
return(wrappingStream);
}
/// <summary>
/// Wraps this message part's original data stream in another stream returned by the <paramref name="wrapper"/>
/// delegate.
/// </summary>
/// <param name="messagePart">
/// The part whose original data stream is wrapped.
/// </param>
/// <param name="wrapper">
/// A delegate, or stream factory, that returns the stream wrapping the original one.
/// </param>
/// <param name="tracker">
/// Pipeline's resource tracker to which to report the newly created wrapping stream.
/// </param>
/// <returns>
/// The new wrapping <see cref="Stream"/> if it is not the same instance as the original one. The original <see
/// cref="Stream"/> otherwise.
/// </returns>
public static T WrapOriginalDataStream <T>(this IBaseMessagePart messagePart, Func <Stream, T> wrapper, IResourceTracker tracker) where T : Stream
{
if (messagePart == null)
{
throw new ArgumentNullException(nameof(messagePart));
}
if (wrapper == null)
{
throw new ArgumentNullException(nameof(wrapper));
}
if (tracker == null)
{
throw new ArgumentNullException(nameof(tracker));
}
var originalDataStream = messagePart.GetOriginalDataStream();
if (originalDataStream == null)
{
return(null);
}
var wrappingStream = wrapper(originalDataStream);
if (ReferenceEquals(originalDataStream, wrappingStream))
{
return((T)originalDataStream);
}
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Wrapping message part's original data stream in a '{0}' stream.", wrappingStream.GetType().FullName);
}
messagePart.SetDataStream(wrappingStream, tracker);
return(wrappingStream);
}
