More GTS Questions: Best "pattern" or approach to build up GTS type.
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gboutwell
#1 Posted : Wednesday, May 22, 2013 4:21:56 PM(UTC)
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I'm wondering what the best pattern or approach would be to 'building-up' GTS in 'steps' or portions..

before any loop I declare GTS:

Code:
GTS frequency = new GTS();


Then I have 2 loops in a program in the first loop

I want to add:

Code:
PIVL<TS> Daily = new PIVL<TS>(new IVL<TS>(today), new PQ(1, "d"));
frequency.Hull = Daily;


then on the 2nd loop I would like to merge/add to the existing frequency.Hull:

Code:
EIVL<TS> atMeals = new EIVL<TS>(DomainTimingEventType.Meal, new IVL<PQ>(new PQ(-1, "h"), new PQ(1, "h")));

// psuedo code.
frequency.Hull.Add(atMeals);

// or
frequency = ????.Insect(frequency.Hull, atMeals);


Any thoughts or suggestions on how this could be done...

Thanks...
George
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justin.fyfe1
#2 Posted : Monday, May 27, 2013 8:13:01 AM(UTC)

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Hmm... That is a good question.

For building up a GTS I would probably use an SXPR hull with an extension method. First the extension method would add the new component to the GTS:

Code:

public static class GTSExtensions
{
    public static void AddExpression(this GTS me, SXCM<TS> component)
    {
        if (!(me.Hull is SXPR<TS>))
            return; // can't do expressions

        // Cast hull to express
        SXPR<TS> hull = me.Hull as SXPR<TS>;

        // Typically new components are intersected, let's do that unless otherwise specified
        if (!component.Operator.HasValue)
            component.Operator = SetOperator.Intersect;

        hull.Add(component);

    }
}


Then the main code could just call this extension method:

Code:

GTS frequency = new GTS(new SXPR<TS>());
TS today = new TS(DateTime.Today, DatePrecision.Day);

// Your code
PIVL<TS> Daily = new PIVL<TS>(new IVL<TS>(today), new PQ(1, "d"));
frequency.AddExpression(Daily);
EIVL<TS> atMeals = new EIVL<TS>(DomainTimingEventType.Meal, new IVL<PQ>(new PQ(-1, "h"), new PQ(1, "h")));
frequency.AddExpression(atMeals);


Finally we can check this output by doing some scaffolding:

Code:

// Output for a sample
DatatypeFormatter formatter = new DatatypeFormatter();
using (XmlStateWriter writer = new XmlStateWriter(XmlWriter.Create(Console.OpenStandardOutput(), new XmlWriterSettings() { Indent = true })))
{
    writer.WriteStartElement("gtsTest", "urn:hl7-org:v3");
    formatter.Graph(writer, frequency);
    writer.WriteEndElement();
}
Console.ReadKey();


Which results in this:

Code:

<gtsTest xsi:type="SXPR_TS" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
" xmlns="urn:hl7-org:v3">
  <comp xsi:type="PIVL_TS">
    <phase value="20130527" />
    <period unit="d" value="1" />
  </comp>
  <comp xsi:type="EIVL_TS" operator="A">
    <event code="C" />
    <offset>
      <low unit="h" value="-1" />
      <high unit="h" value="1" />
    </offset>
  </comp>
</gtsTest>


Hope that helps!
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1 user thanked justin.fyfe1 for this useful post.
gboutwell on 6/3/2013(UTC)
gboutwell
#3 Posted : Monday, June 3, 2013 10:01:20 AM(UTC)
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Jsutin,

Again, thank you. This is very nice/clean looking code when going to use it. I appreaciate the help and thoughtful suggestions.

George
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