/// <summary>
/// Creates an instance of a HL7 Message
/// </summary>
/// <param name="mesg"></param>
public HL7Message(string mesg)
{
if (mesg.Length < 8)
{
throw new ArgumentException("Not a complete HL7 message");
}
var mesgHeader = mesg.Substring(0, 8);
if (mesgHeader.Length < 8)
{
throw new ArgumentException("Not a valid HL7 message");
}
_segments = new HL7Element(mesg, '\r', ValidatedSeparators(mesgHeader), null);
}
/// <summary>
/// Creates an instance of a HL7 Message
/// </summary>
/// <param name="mesg"></param>
public HL7Message(string mesg)
{
if (mesg.Length < 8)
{
throw new ArgumentException("Not a complete HL7 message");
}
var mesgHeader = mesg.Substring(0, 8);
if (mesgHeader.Length < 8)
{
throw new ArgumentException("Not a valid HL7 message");
}
var lineEndings = mesg.LineEnding();
var separators = ValidatedSeparators(mesgHeader);
if (lineEndings.Length > 0)
{
separators = lineEndings[0] + separators.Substring(1);
}
_segments = new HL7Element(mesg, separators[0], separators, null);
}
public int SetField(int index, HL7Element value)
{
return(this.SetElement(value, index) - 1);
}
public HL7Segment(string data, char separator, string separators = Constants.Separators, HL7Element owner = null)
{
AddStringElements(data, separator, separators, owner);
}
/// <summary>
/// Returns a specific field based on selection Criteria
/// NOTE: Selection Criteria can be a string such as "MSH.1.16[2]" or an array of Selection Criteria Elements
/// </summary>
/// <param name="criteria"></param>
/// <returns></returns>
public HL7Element Element(SearchCriteria criteria)
{
var nullSegment = new HL7Element("", '|');
// Locate required Segment
if (criteria == null || criteria.Segment == null)
{
return(null);
}
var segmentElements = AllSegments(criteria.Segment);
var targetRow = (criteria.SegmentRepetition > 0) ? criteria.SegmentRepetition - 1 : 0;
if (targetRow > segmentElements.Count - 1)
{
return(nullSegment); // not found;
}
var result = segmentElements[targetRow];
//Field
// Does the position need a header Ajustment (Eg MSH,BHS, FSH)
if (!criteria.Field.Enabled)
{
return(segmentElements[targetRow]); //wants only the full segment
}
var headerAdjustment = (Constants.HeaderTypes.Any(h => h.Equals(criteria.Segment))) ? 1 : 0;
result = result[criteria.Field.Position - headerAdjustment];
if (criteria.Field.Repetition == -1)
{
return(result);
}
if (criteria.Field.Repetition > result.Count)
{
return(nullSegment);
}
var rep = ((criteria.Field.Repetition < 2) ? 1 : criteria.Field.Repetition) - 1;
if (rep < result.Count)
{
result = result[rep];
}
//Component
if (!criteria.Component.Enabled || criteria.Component.Repetition == -1 ||
(result.Count == 0 && criteria.Component.Position < 2))
{
return(result);
}
if (criteria.Component.Position > result.Count)
{
return(nullSegment);
}
result = result[criteria.Component.Position - 1];
//SubComponent
if (!criteria.Subcomponent.Enabled || criteria.Subcomponent.Repetition == -1 ||
(criteria.Subcomponent.Position < 2 && result.Count == 0))
{
return(result);
}
if (criteria.Subcomponent.Position > 1 && criteria.Component.Position > result.Count)
{
return(nullSegment);
}
result = result[criteria.Subcomponent.Position - 1];
return(result);
}