/// <summary>
/// Convenient method to set the content type.
/// Set first content type 1, if this is set (not empty), then set the second, etc.
/// </summary>
/// <param name="contentType">The content type to set.</param>
/// <returns>This class.</returns>
public Message SetContentType(Content contentType)
{
for (int i = 0, reference = 0; i < ContentTypeLength; i++)
{
if (ContentTypes[i] == Content.Empty) // TODO check if this works as expected (cf. java tests for null)
{
if (contentType == Content.PublicKeySignature && i != 0)
{
throw new InvalidOperationException("The public key needs to be the first to be set.");
}
ContentTypes[i] = contentType;
ContentReferences.Enqueue(new MessageContentIndex(reference, contentType));
return(this);
}
if (ContentTypes[i] == contentType)
{
reference++;
}
else if (ContentTypes[i] == Content.PublicKeySignature || ContentTypes[i] == Content.PublicKey)
{
// special handling for public key, as we store both in the same list
if (contentType == Content.PublicKeySignature || contentType == Content.PublicKey)
{
reference++;
}
}
}
throw new InvalidOperationException("Already set 8 content types.");
}
// TODO check comment, if only vs. only if
/// <summary>
/// Restore the content references if only the content types array is
/// present. The content references are removed when decoding a message. That
/// means if a message was received it cannot be used a second time as the
/// content references are not there anymore. This method restores the
/// content references based on the content types of the message.
/// </summary>
public void RestoreContentReferences()
{
IDictionary <Content, int> references = new Dictionary <Content, int>(ContentTypes.Count() * 2);
foreach (var contentType in ContentTypes)
{
// TODO what about Content.Undefined
if (contentType == Content.Empty)
{
return;
}
int index = 0;
if (contentType == Content.PublicKeySignature || contentType == Content.PublicKey)
{
int j = references[Content.PublicKeySignature];
if (j != default(int))
{
index = j;
}
else
{
j = references[Content.PublicKey];
if (j != default(int))
{
index = j;
}
}
}
if (!references.ContainsKey(contentType))
{
references.Add(contentType, index);
}
else
{
index = references[contentType];
}
ContentReferences.Enqueue(new MessageContentIndex(index, contentType));
references.Add(contentType, index + 1);
}
}