private bool Validate(UserState userState, byte[] input)
{
try {
return (bool)userState.MethodValidate.Invoke(null, new object[] { input });
} catch {
return false;
}
}
public UserDefinedTimestampState(UserState us)
: base(us)
{
}
public UserDefinedState(UserState us)
{
UserStateObj = us;
}
private DateTime GetDateTime(UserState userState, byte[] input)
{
try {
return (DateTime)userState.MethodDatetime.Invoke(null, new object[] { input });
} catch {
// Timestamp that will be filtered out.
return new DateTime(1800, 1, 1);
}
}
private static UserState ParseStateMachine(XElement xState)
{
string name = RequiredAttribute(xState, "name");
Viterbi.MachineList type = UserState.GetMachineType(RequiredAttribute(xState, "type"));
string lib = RequiredAttribute(xState, "lib");
string classname = RequiredAttribute(xState, "class");
string format = RequiredAttribute(xState, "format");
string validate = RequiredAttribute(xState, "validate");
string datetime = null;
if (type == Viterbi.MachineList.TimeStamp_User) {
datetime = RequiredAttribute(xState, "datetime");
}
List<UserByte> bytes = new List<UserByte>();
foreach (XElement xByte in xState.Elements("byte")) {
UserByte ub = new UserByte();
foreach (XElement xVal in xByte.Elements()) {
ub.AddElement(xVal);
}
if (!ub.IsValid()) {
throw new UserStatesException("Invalid byte in state machine");
}
bytes.Add(ub);
}
if (bytes.Count < 2) {
throw new UserStatesException("State machine has last than two bytes defined");
}
UserState uState = new UserState(type, name, bytes, lib, classname, format, validate, datetime);
uState.LoadMethods();
return uState;
}
/// <summary>
/// Gets the state machine for a user-defined timestamp.
/// </summary>
/// <param name="userState">Object representing the user-defined state machine.</param>
/// <param name="weight"></param>
/// <returns>The state machine.</returns>
public static StateMachine GetTimestamp_UserDefined(UserState userState, int weight)
{
StateMachine timestamp = new StateMachine { Name = userState.MachineType, _weight = weight };
State prevState = null;
// Have a minimum of 2 bytes.
for (int n = 0; n < userState.Bytes.Count - 1; n++)
{
string nm = String.Format("UserTimestampByte{0}", n);
State state = new State { Name = nm, ParentStateMachine = timestamp };
timestamp.AddState(state);
if (n == 0)
{
timestamp.StartingStates.Add(state);
}
else
{
AddTransition(prevState, state, 1d);
}
prevState = state;
UserDefinedByteProbabilities(state, userState.Bytes[n]);
}
UserDefinedTimestampState endState = new UserDefinedTimestampState(userState) { Name = "EndUserTimestampByte", ParentStateMachine = timestamp };
timestamp.AddState(endState);
UserDefinedByteProbabilities(endState, userState.Bytes[userState.Bytes.Count - 1]);
AddTransition(prevState, endState, 1d);
timestamp.EndingStates.Add(endState);
return timestamp;
}
/// <summary>
/// Called by the ExtractField() method of Viterbi class, to get a readable format of a Viterbi field
/// whose corresponding bytes are passed through input. This metohd is used with user-defined states.
/// </summary>
/// <param name="machineName">The state's machine name.</param>
/// <param name="input">The bytes to ne interpreted.</param>
/// <param name="uState">The UserState object, which references the method for interpreting the input.</param>
/// <returns>The string representation.</returns>
public static string GetUserField(MachineList machineName, byte[] input, UserState uState)
{
try {
if ((machineName == MachineList.PhoneNumber_User) || (machineName == MachineList.Text_User)) {
return (string)uState.MethodFormat.Invoke(null, new object[] { input });
} else {
// For timestamps get the DateTime and format it, rather than use the user's
// format method. This is for consistency.
DateTime dt = (DateTime)uState.MethodDatetime.Invoke(null, new object[] { input });
return dt.ToString();
}
} catch {
return "???";
}
}
