Yes, isEmpty() has some issues. I think some of them were fixed,
unfortunately after the 2.1 release; but some corner cases like existing
but empty extra components were not considered. I'll look deeper into it as
soon as time permits.
Would you think, active nulls ("") should be considered an "empty" value?
Personally I don't think so....
Christian
2013/9/30 Ian Vowles <ian_vow...@health.qld.gov.au>
> Checking for nulls, empty strings, empty data types and active nulls
> makes for a lot of code in message transforms.
>
> The presence of .isEmpty() looks like a godsend, but how is it intended to
> work?
>
> The following code produces the results shown below. Is this the way it's
> supposed to work?
>
> Thanks
> Ian
>
> /*
> * To change this template, choose Tools | Templates
> * and open the template in the editor.
> */
> package hapiexamples;
>
> import ca.uhn.hl7v2.HL7Exception;
> import ca.uhn.hl7v2.model.v231.message.ADT_A08;
>
> /**
> *
> * @author vowlesi
> */
> public class CheckIsemptyFeatures {
>
> private static final String ACTIVE_NULL = "\"\"";
> private static ADT_A08 hl7In;
>
> public static void main(String[] args) throws HL7Exception {
> hl7In = new ADT_A08();
> hl7In.getMSH().getMsh1_FieldSeparator().setValue("|");
> hl7In.getMSH().getMsh2_EncodingCharacters().setValue("^~\\&");
> System.out.println("After construction with new() .isEmpty()
> returns '" + hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> hl7In.getPID().getPid19_SSNNumberPatient().parse("");
> System.out.println("After parsing '' (empty string) .isEmpty()
> returns '" + hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> hl7In.getPID().getPid19_SSNNumberPatient().parse("^^^^^");
> System.out.println("After parsing '^^^^^' unexpected components
> .isEmpty() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> hl7In.getPID().getPid19_SSNNumberPatient().parse(ACTIVE_NULL);
> System.out.println("After parsing '\"\"' (active null) .isEmpty()
> returns '" + hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> hl7In.getPID().getPid19_SSNNumberPatient().parse(ACTIVE_NULL +
> "^^^^");
> System.out.println("After parsing '\"\"^^^^' (active null and
> unexpected components) .isEmpty() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> String inputHl7 =
> "MSH|^~\\&|HOMER|fake|DGATE-FAKE^prjHbcisRawIn|99999|20130923023038||ADT^A08|2013092302303834022003|P|2.3|||AL|AL|AUS|ASCII|ENG\r"
> + "EVN|A08|20130923023038|\r"
> + "PID|1|\"\"|708010^^^MRN^MR|PENSION
> NO^^^DSS^PE|SURNAME^GIVEN^^^MRS^^L||19381216|F||14|UNIT A/1 FAKE
> ST^\"\"^BRISBANE^^4000^\"\"^P||12345678^PRN^^^^^12345678||86^ENGLISH
> ONLY|W|2233|708010-4|4072469157||||1101||||||20130923|Y\r";
> hl7In.parse(inputHl7);
> System.out.println("After parsing message with medicare(SSN)
> .isEmpty() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> System.out.println("After parsing message with medicare(SSN)
> .getValue() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().getValue() + "'");
> System.out.println("After parsing message with language .isEmpty()
> returns '" + hl7In.getPID().getPid15_PrimaryLanguage().isEmpty() + "'");
> System.out.println("After parsing message with language
> .getCe1_Identifier().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe1_Identifier().getValue() +
> "'");
> inputHl7 =
> "MSH|^~\\&|HOMER|fake|DGATE-FAKE^prjHbcisRawIn|99999|20130923023038||ADT^A08|2013092302303834022003|P|2.3|||AL|AL|AUS|ASCII|ENG\r"
> + "EVN|A08|20130923023038|\r"
> + "PID|1|\"\"|708010^^^MRN^MR|PENSION
> NO^^^DSS^PE|SURNAME^GIVEN^^^MRS^^L||19381216|F||14|UNIT A/1 FAKE
> ST^\"\"^BRISBANE^^4000^\"\"^P||12345678^PRN^^^^^12345678||^^^^^|W|2233|708010-4|||||1101||||||20130923|Y\r";
> hl7In.parse(inputHl7);
> System.out.println("After parsing message without medicare(SSN)
> .isEmpty() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().isEmpty() + "'");
> System.out.println("After parsing message without medicare(SSN)
> .getValue() returns '" +
> hl7In.getPID().getPid19_SSNNumberPatient().getValue() + "'");
> System.out.println("After parsing message without language
> .isEmpty() returns '" + hl7In.getPID().getPid15_PrimaryLanguage().isEmpty()
> + "'");
> System.out.println("After parsing message without language
> .getCe1_Identifier().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe1_Identifier().getValue() +
> "'");
> System.out.println("After parsing message without language
> .getCe2_Text().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe2_Text().getValue() + "'");
> System.out.println("After parsing message without language
> .getCe3_NameOfCodingSystem().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe3_NameOfCodingSystem().getValue()
> + "'");
> System.out.println("After parsing message without language
> .getCe4_AlternateIdentifier().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe4_AlternateIdentifier().getValue()
> + "'");
> System.out.println("After parsing message without language
> .getCe5_AlternateText().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe5_AlternateText().getValue()
> + "'");
> System.out.println("After parsing message without language
> .getCe6_NameOfAlternateCodingSystem().getValue() returns '" +
> hl7In.getPID().getPid15_PrimaryLanguage().getCe6_NameOfAlternateCodingSystem().getValue()
> + "'");
> }
> }
>
>
> After construction with new() .isEmpty() returns 'false'
> After parsing '' (empty string) .isEmpty() returns 'false'
> After parsing '^^^^^' unexpected components .isEmpty() returns 'true'
> After parsing '""' (active null) .isEmpty() returns 'false'
> After parsing '""^^^^' (active null and unexpected components) .isEmpty()
> returns 'false'
> After parsing message with medicare(SSN) .isEmpty() returns 'false'
> After parsing message with medicare(SSN) .getValue() returns '4072469157'
> After parsing message with language .isEmpty() returns 'false'
> After parsing message with language .getCe1_Identifier().getValue()
> returns '86'
> After parsing message without medicare(SSN) .isEmpty() returns 'false'
> After parsing message without medicare(SSN) .getValue() returns 'null'
> After parsing message without language .isEmpty() returns 'false'
> After parsing message without language .getCe1_Identifier().getValue()
> returns 'null'
> After parsing message without language .getCe2_Text().getValue()
> returns 'null'
> After parsing message without language
> .getCe3_NameOfCodingSystem().getValue() returns 'null'
> After parsing message without language
> .getCe4_AlternateIdentifier().getValue() returns 'null'
> After parsing message without language .getCe5_AlternateText().getValue()
> returns 'null'
> After parsing message without language
> .getCe6_NameOfAlternateCodingSystem().getValue() returns 'null'
>
>
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