#253 Hapi Terser issue to retrieve HL7 segments

[Supratim Paul]

I am having the following Demo HL7 script which I need to retrieve using Terser.

MSH||||||||||||||||||||||||||||||
EVN||||||||||||||||||||||||||||||
PID|||3214^^^^|||||||||||||||||||
PV1||||||||||||||||||||||||||||||
PV2||||||||||||||||||||||||||||||
IN1|1|^Test IN1(1)|||||||||||||||
IN2|||^Test IN2^^^|||||||||||||||
IN1|2|^Test IN1(2)|||||||||||||||
IN2|||^Test IN2^^^|||||||||||||||
ROL|||^Test ROL^^^|||||||||||||||
DG1|||^Test DG1^^^|||||||||||||||
OBX||CWE|||||||||||||||||||||||||
GT1||123456^^^90XXXX^SS^^||||||||
NK1||^Test NK1^^^||||||||||||||||
ACC||^Test ACC^^^||||||||||||||||
ZAR|Test Z1||||||||||||||||||||||
ZSH|Test Z|||||||||||||||||||||||
ZAR|Test Z2||||||||||||||||||||||
ZSH|Test Z|||||||||||||||||||||||

I am having following issues. Please help.

1. When I am retrieving the following - terser.get("/PID-3-1") - I am getting the expected result i.e. 3214.
   But the following result is giving NULL - terser.get("/ROL-3-2"), terser.get("/DG1-3-1"), terser.get("/OBX-2"), terser.get("/GT1-2-1"), terser.get("/NK1-2-2"), terser.get("/ACC-2-2").
   Please help me to retrieve ROL, DG1, OBX, GT1, NK1 and ACC segments.

2. Also if I retrieve terser.get("/IN1-2-2"), I am having the expected result. But I am not able to retrieve the repetition of IN1. I have tried ("/IN1(1)-2-2"), ("/.INSURANCE(1)/.IN1-2-2") but didn't help.

3. When I am retrieving external segment ("/ZAR-1"), it is returning my result. But I am not able to retrieve ("/ZAR(1)-1"), it's giving NULL. However if the 2nd ZAR segment comes after the 1st ZAR without any ZSH segment then I can retrieve the repetition of ZAR using ("/ZAR(1)-1").

I am waiting for your responses.

[Christian Ohr]

Please provide details about the MSH segment. The Terser paths depend on the event type and the HL7 version.

[Supratim Paul]

Segment - MSH|^~\&|||||||ADT^A01|P|2.8.1||1
Event Type is A01 and HL7 version is 2.8.1.

[Christian Ohr]

1. Use version HAPI version 2.3
2. You need to specify the segments in the order they are defined in the message definition! - your example is completely mixed up
3. Custom Z segments appended to a message can never be in a group - how should the parser know that ZAR and ZSH supposed to form a group? If a segment is not immediately repeating, the second occurence gets a custom segment name (with a number appended to the segment name) to make it unique.

Here is a working example (should also work with 2.8.1):

    @Test
    public void test() {
        String hl7 = "MSH|^~\\&|||||||ADT^A01|4711|P|2.5||1\r" +
                "EVN||||||||||||||||||||||||||||||\r" +
                "PID|||3214^^^^|||||||||||||||||||\r" +
                "ROL|||^Test ROL^^^|||||||||||||||\r" +
                "NK1||^Test NK1^^^||||||||||||||||\r" +
                "PV1||||||||||||||||||||||||||||||\r" +
                "PV2||||||||||||||||||||||||||||||\r" +
                "OBX||CWE|||||||||||||||||||||||||\r" +
                "DG1|||^Test DG1^^^|||||||||||||||\r" +
                "GT1||123456^^^90XXXX^SS^^||||||||\r" +
                "IN1|1|^Test IN1(1)|||||||||||||||\r" +
                "IN2|||^Test IN2^^^|||||||||||||||\r" +
                "IN1|2|^Test IN1(2)|||||||||||||||\r" +
                "IN2|||^Test IN2^^^|||||||||||||||\r" +
                "ACC||^Test ACC^^^||||||||||||||||\r" +
                "ZAR|Test Z1||||||||||||||||||||||\r" +
                "ZSH|Test Z|||||||||||||||||||||||\r" +
                "ZAR|Test Z2||||||||||||||||||||||\r" +
                "ZSH|Test Z|||||||||||||||||||||||"
        HapiContext hapiContext = new DefaultHapiContext()
        def msg = hapiContext.pipeParser.parse(hl7)

        Terser terser = new Terser(msg)
        println(terser.get("/PID-3-1"))
        println(terser.get("/ROL-3-2"))
        println(terser.get("/DG1-3-2"))
        println(terser.get("/OBX-2"))
        println(terser.get("/GT1-2-1"))
        println(terser.get("/NK1-2-2"))
        println(terser.get("/ACC-2-2"))
        println(terser.get("/INSURANCE(0)/IN1-2-2"))
        println(terser.get("/INSURANCE(1)/IN1-2-2"))
        println(terser.get("/ZAR-1"))
        println(terser.get("/ZAR2-1"))
    }

And the output is

3214
Test ROL
Test DG1
CWE
123456
Test NK1
Test ACC
Test IN1(1)
Test IN1(2)
Test Z1
Test Z2

[Supratim Paul]

Thanks for your input. Can you specify the exact Hapi JAR name?