private string TryToRecoverTheVersion(string messageString)
{
String version = null;
String wholeField12;
try
{
String[] fields = PipeParser.Split(messageString.Substring(0, (Math.Max(messageString.IndexOf("\r"), messageString.Length)) - (0)),
Convert.ToString(enchars.FieldSeparator));
wholeField12 = fields[11];
//message structure is component 3 but we'll accept a composite of 1 and 2 if there is no component 3 ...
// if component 1 is ACK, then the structure is ACK regardless of component 2
String[] comps = PipeParser.Split(wholeField12, Convert.ToString(enchars.ComponentSeparator));
if (comps.Length > 0)
{
//messageStructure = comps[2];
version = comps[0];
}
else
{
StringBuilder buf = new StringBuilder("Can't determine message version from MSH-12: ");
throw new HL7Exception(buf.ToString(), HL7Exception.UNSUPPORTED_VERSION_ID);
}
}
catch (IndexOutOfRangeException e)
{
throw new HL7Exception("Can't find message structure (MSH-9-3): " + e.Message, HL7Exception.UNSUPPORTED_MESSAGE_TYPE);
}
return(ParserBase.ValidVersion(version) ? version : null);
}
private string TryTorecoverTheMessageType(string messageString)
{
EncodingCharacters ec = new EncodingCharacters('|', null);
String messageStructure = null;
bool explicityDefined = true;
String wholeFieldNine;
try
{
String[] fields = PipeParser.Split(messageString.Substring(0, (Math.Max(messageString.IndexOf("\r"), messageString.Length)) - (0)),
Convert.ToString(ec.FieldSeparator));
wholeFieldNine = fields[8];
//message structure is component 3 but we'll accept a composite of 1 and 2 if there is no component 3 ...
// if component 1 is ACK, then the structure is ACK regardless of component 2
String[] comps = PipeParser.Split(wholeFieldNine, Convert.ToString(ec.ComponentSeparator));
if (comps.Length >= 3)
{
//messageStructure = comps[2];
messageStructure = comps[0] + "_" + comps[1];
}
else if (comps.Length > 0 && comps[0] != null && comps[0].Equals("ACK"))
{
messageStructure = "ACK";
}
else if (comps.Length == 2)
{
explicityDefined = false;
messageStructure = comps[0] + "_" + comps[1];
}
/*else if (comps.length == 1 && comps[0] != null && comps[0].equals("ACK")) {
* messageStructure = "ACK"; //it's common for people to only populate component 1 in an ACK msg
* }*/
else
{
StringBuilder buf = new StringBuilder("Can't determine message structure from MSH-9: ");
buf.Append(wholeFieldNine);
if (comps.Length < 3)
{
buf.Append(" HINT: there are only ");
buf.Append(comps.Length);
buf.Append(" of 3 components present");
}
throw new HL7Exception(buf.ToString(), HL7Exception.UNSUPPORTED_MESSAGE_TYPE);
}
}
catch (IndexOutOfRangeException e)
{
throw new HL7Exception("Can't find message structure (MSH-9-3): " + e.Message, HL7Exception.UNSUPPORTED_MESSAGE_TYPE);
}
return(messageStructure);
}
private ISegment TryToRecoverCriticalDataFromMessage(string message)
{
ISegment msh = null;
if (!message.StartsWith("MSH|"))
{
return(null);
}
//try to get MSH segment
int locStartMSH = message.IndexOf("MSH");
if (locStartMSH < 0)
{
return(null);
}
int locEndMSH = message.IndexOf('\r', locStartMSH + 1);
if (locEndMSH < 0)
{
locEndMSH = message.Length;
}
String mshString = message.Substring(locStartMSH, (locEndMSH) - (locStartMSH));
//find out what the field separator is
char fieldSep = mshString[3];
//get field array
String[] fields = PipeParser.Split(mshString, Convert.ToString(fieldSep));
try
{
//parse required fields
String encChars = fields[1];
char compSep = encChars[0];
String messControlID = fields[9];
String[] procIDComps = PipeParser.Split(fields[10], Convert.ToString(compSep));
//fill MSH segment
String version = NHapi.Model.V251.Constants.VERSION; //default
try
{
version = contextParser.GetVersion(message);
}
catch (Exception)
{
/* use the default */
}
//IModelClassFactory factory = parser.Factory;
//msh = new MSH(new NHapiBugsFixing.V251(factory), factory);
//msh = new GenericSegment(new NHapiBugsFixing.GenericMessageVersion(version), "MSH");
Terser.Set(msh, 1, 0, 1, 1, Convert.ToString(fieldSep));
Terser.Set(msh, 2, 0, 1, 1, encChars);
Terser.Set(msh, 10, 0, 1, 1, messControlID);
Terser.Set(msh, 12, 0, 1, 1, version);
string messageType = TryTorecoverTheMessageType(message);
if (!string.IsNullOrEmpty(messageType))
{
Terser.Set(msh, 9, 0, 1, 1, messageType.Split('_')[0]);
if (messageType.Split('_').Length > 0)
{
Terser.Set(msh, 9, 0, 2, 1, messageType.Split('_')[1]);
}
}
//Terser.Set(msh, 11, 0, 1, 1, procIDComps[0]);
}
catch (HL7Exception he)
{
_errorMessage.AppendLine(he.Message);
return(null);
}
catch (System.Exception se)
{
_errorMessage.AppendLine(se.Message);
return(null);
}
return(msh);
}