/// <summary>
/// Reads the regular expressions and weights that form the handler.
/// </summary>
/// <param name="reader">Data source being processed.</param>
/// <param name="handler">Handler being created.</param>
private static void ReadRegexSegmentHandler(BinaryReader reader, RegexSegmentHandler handler)
{
int count = reader.ReadInt16();
for (int i = 0; i < count; i++)
{
handler.Segments.Add(new RegexSegmentHandler.RegexSegment(
reader.ReadString(), reader.ReadInt32()));
}
}
/// <summary>
/// Adds the segments to the regular expression handler.
/// </summary>
/// <param name="handler">Regular expression handler.</param>
/// <param name="reader">The XML stream reader.</param>
private static void ProcessRegexSegments(RegexSegmentHandler handler, XmlReader reader)
{
while (reader.Read())
{
if (reader.Depth > 0)
{
string pattern = reader.GetAttribute("pattern");
int weight = 0;
if (String.IsNullOrEmpty(pattern) == false &&
int.TryParse(reader.GetAttribute("weight"), out weight))
handler.AddSegment(pattern, weight);
}
}
}
/// <summary>
/// Creates the handler for the current provider.
/// </summary>
/// <param name="reader">Data source being processed.</param>
/// <param name="provider">Provider the new handler should be assigned to.</param>
/// <returns>An instance of the new handler.</returns>
private static Handler CreateHandler(BinaryReader reader, Provider provider)
{
HandlerTypes type = (HandlerTypes)reader.ReadByte();
byte confidence = reader.ReadByte();
string name = reader.ReadString();
bool checkUAProfs = reader.ReadBoolean();
string defaultDeviceId = String.Empty;
switch (type)
{
case HandlerTypes.EditDistance:
return new Handlers.EditDistanceHandler(
provider, name, defaultDeviceId, confidence, checkUAProfs);
case HandlerTypes.ReducedInitialString:
return new Handlers.ReducedInitialStringHandler(
provider, name, defaultDeviceId, confidence, checkUAProfs, reader.ReadString());
case HandlerTypes.RegexSegment:
var handler = new Handlers.RegexSegmentHandler(
provider, name, defaultDeviceId, confidence, checkUAProfs);
ReadRegexSegmentHandler(reader, handler);
return handler;
}
throw new BinaryException(String.Format("Type '{0}' is not a recognised handler.", type));
}