// Writes a single book volume to the output; it expects the writer returned by the
// Create method. After writing all book volumes the method Finalize must be called.
public void Write(BinaryWriter writer, Volume volume)
{
// The initial bool true will be recognized when deserializing the volumes. The
// method Finalize writes false as the end marker.
writer.Write(true);
volume.Write(writer);
}
// Parses a single book volume.
Volume ParseVolume(XmlReader reader)
{
var volume = new Volume();
var formats = new List<string>();
while (reader.Read())
if (reader.NodeType == XmlNodeType.Element)
switch (reader.LocalName) {
case "file":
volume.URL = ParseVolumeUrl(reader);
break;
case "format":
if (!reader.ReadToDescendant("value", RDF))
throw new ApplicationException("Missing format value.");
formats.Add(reader.ReadElementContentAsString());
break;
case "extent":
volume.Size = reader.ReadElementContentAsInt();
break;
case "modified":
if (!reader.ReadToDescendant("value", RDF))
throw new ApplicationException("Missing modified date value.");
volume.Uploaded = reader.ReadElementContentAsDate();
break;
case "isFormatOf":
volume.Number = int.Parse(reader.GetAttribute("resource", RDF).
Substring(6), CultureInfo.InvariantCulture);
break;
}
volume.Formats = formats.Count > 0 ? formats.ToArray() : null;
return volume;
}
// Gets volumes for the specified book number.
public bool TryGetVolumes(int number, out Volume[] volumes)
{
if (number >= 0 && number < VolumesByNumber.Length) {
volumes = VolumesByNumber[number];
return volumes != null;
}
volumes = null;
return false;
}
