/// <summary>
/// Test a new media object to see if it can belong to this collection
/// (optionally a sequence can allow only a single <see cref="Type"/> of <see cref="Media"/>)
/// </summary>
/// <param name="proposedAddition">The media to test</param>
/// <returns></returns>
/// <exception cref="exception.MethodParameterIsNullException">
/// Thrown when the proposed addition is null
/// </exception>
public virtual bool CanAcceptMedia(Media proposedAddition)
{
if (proposedAddition == null)
{
throw new exception.MethodParameterIsNullException(
"The proposed addition is null");
}
if (mSequence.Count > 0 && !AllowMultipleTypes)
{
if (mSequence.Get(0).GetType() != proposedAddition.GetType())
{
return(false);
}
}
return(true);
}
private void XukInSequence(XmlReader source, IProgressHandler handler)
{
if (!source.IsEmptyElement)
{
while (source.Read())
{
if (source.NodeType == XmlNodeType.Element)
{
Media newMedia = Presentation.MediaFactory.Create(source.LocalName, source.NamespaceURI);
if (newMedia != null)
{
newMedia.XukIn(source, handler);
if (!CanAcceptMedia(newMedia))
{
throw new exception.XukException(
String.Format("Media type {0} is not supported by the sequence",
newMedia.GetType().FullName));
}
InsertItem(mSequence.Count, newMedia);
}
else if (!source.IsEmptyElement)
{
source.ReadSubtree().Close();
}
}
else if (source.NodeType == XmlNodeType.EndElement)
{
break;
}
if (source.EOF)
{
throw new exception.XukException("Unexpectedly reached EOF");
}
}
}
}