Examples of ca.uhn.hl7v2.util.Terser

ca.uhn.hl7v2.util.Terser

Wraps a message to provide access to fields using a terse location specification syntax. For example:

terser.set("MSH-9-3", "ADT_A01");
can be used instead of
message.getMSH().getMessageType().getMessageStructure().setValue("ADT_A01");

The syntax of a location spec is as follows:

location_spec: segment_path_spec "-" field ["(" rep ")"] ["-" component ["-" subcomponent]]

... where rep, field, component, and subcomponent are integers (representing, respectively, the field repetition (starting at 0), and the field number, component number, and subcomponent numbers (starting at 1). Omitting the rep is equivalent to specifying 0; omitting the component or subcomponent is equivalent to specifying 1.

The syntax for the segment_path_spec is as follows:

segment_path_spec: ["/"] (group_spec ["(" rep ")"] "/")* segment_spec ["(" rep ")"]

... where rep has the same meaning as for fields.

A leading "/" indicates that navigation to the location begins at the root of the message; omitting this indicates that navigation begins at the current location of the underlying SegmentFinder (see getFinder() -- this allows manual navigation if desired). The syntax for group_spec is:

group_spec: ["."] group_name_pattern

Here, a . indicates that the group should be searched for (using a SegmentFinder) starting at the current location in the message. The wildcards "*" and "?" represent any number of arbitrary characters, and a single arbitrary character, respectively. For example, "M*" and "?S?" match MSH. The first group with a name that matches the given group_name_pattern will be matched.

The segment_spec is analogous to the group_spec.

As another example, the following subcomponent in an SIU_S12 message:

msg.getSIU_S12_RGSAISNTEAIGNTEAILNTEAIPNTE(1).getSIU_S12_AIGNTE().getAIG().getResourceGroup(1).getIdentifier();

... is referenced by all of the following location_spec:

/SIU_S12_RGSAISNTEAIGNTEAILNTEAIPNTE(1)/SIU_S12_AIGNTE/AIG-5(1)-1 /*AIG*(1)/SIU_S12_AIGNTE/AIG-5(1)-1 /*AIG*(1)/.AIG-5(1)
The search function only iterates through rep 0 of each group. Thus if rep 0 of the first group in this example was desired instead of rep 1, the following syntax would also work (since there is only one AIG segment position in SUI_S12): /.AIG-5(1) @author Bryan Tripp @author Ryan W. Gross (General Electric Corporation - Healthcare IT).




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210           public void run() {
            try {
              // get message ID
              String ID = generator.getID();
              Message out = parser.parse(outText);
              Terser tOut = new Terser(out);
              tOut.set("/MSH-10", ID);


              // send, get response
              Message in = initiator.sendAndReceive(out);
              // get ACK ID
              Terser tIn = new Terser(in);
              String ackID = tIn.get("/MSA-2");
              if (ID.equals(ackID)) {
                System.out.println("OK - ack ID matches");
              } else {
                throw new RuntimeException(
                    "Ack ID for message " + ID + " is "

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95     return handler.result();
  }


  private void testMessageRules(Message message, ValidationExceptionHandler<R> handler)
      throws HL7Exception {
    Terser t = new Terser(message);
    String messageType = t.get("MSH-9-1");
    String triggerEvent = t.get("MSH-9-2");
    List<MessageRule> rules = new ArrayList<MessageRule>();
    if (getValidationContext() != null) {
      rules.addAll(getValidationContext().getMessageRules(message.getVersion(), messageType,
          triggerEvent));
    }

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131    * @see Validator#validate
   */
  public HL7Exception[] validate(Message message, StaticDef profile) throws ProfileException,
      HL7Exception {
    List<HL7Exception> exList = new ArrayList<HL7Exception>();
    Terser t = new Terser(message);


        checkMessageType(t.get("/MSH-9-1"), profile, exList);
        checkEventType(t.get("/MSH-9-2"), profile, exList);
        checkMessageStructure(t.get("/MSH-9-3"), profile, exList);


        exList.addAll(doTestGroup(message, profile, profile.getIdentifier(),
        validateChildren));
    return exList.toArray(new HL7Exception[exList.size()]);
  }
 

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135         
        return problems.toArray(new ValidationException[problems.size()]);
    }
    
    private String[] getDeclaredProfileIDs(Message theMessage) throws HL7Exception {
        Terser t = new Terser(theMessage);
        boolean noMore = false;
        int c = 0;
        List<String> declaredProfiles = new ArrayList<String>(8);
        while (!noMore) {
            String path = "MSH-21(" + c++ + ")";
            String idRep = t.get(path);
            //FIXME fails if empty rep precedes full rep ... should add getAll() to Terser and use that
            if (idRep == null || idRep.equals("")) {
                noMore = true;
            } else {
                declaredProfiles.add(idRep);

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67       super();
      this.expression = expression;
    }


    public Object evaluate(Message msg) throws HL7Exception {
      return new Terser(msg).get(expression);
    }

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82       // Terser Expression is equivalent with Location
      return "";
    }


    public Location getLocation(Message msg) throws HL7Exception {
      Terser t = new Terser(msg);
      StringTokenizer tok = new StringTokenizer(expression, "-", false);
      Segment segment = t.getSegment(tok.nextToken());
      Location location = new Location()
          .withSegmentName(segment.getName())
          .withFieldIndizes(Terser.getIndices(expression));
      return location;
    }

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180         String outgoingMessageString = null;
        String outgoingMessageCharset = null;
        try {
            incomingMessageObject = myParser.parse(incomingMessageString);
            
            Terser inTerser = new Terser(incomingMessageObject);
            theMetadata.put(MetadataKeys.IN_MESSAGE_CONTROL_ID, inTerser.get("/.MSH-10"));
            
        }
        catch (HL7Exception e) {
      try {
         outgoingMessageString = logAndMakeErrorMessage(e, myParser.getCriticalResponseData(incomingMessageString), myParser, myParser.getEncoding(incomingMessageString));               
      } catch (HL7Exception e2) {
         outgoingMessageString = null;
      }
          if (myExceptionHandler != null) {
            outgoingMessageString = myExceptionHandler.processException(incomingMessageString, theMetadata, outgoingMessageString, e);
            
            if (myContext.getServerConfiguration().getApplicationExceptionPolicy() == ApplicationExceptionPolicy.DO_NOT_RESPOND) {
              outgoingMessageString = null;
            } else if (outgoingMessageString == null) {
              throw new HL7Exception("Application exception handler may not return null");
            }
            
          }
        }
        
        if (outgoingMessageString == null) {
            try {
                //optionally check integrity of parse
                String check = System.getProperty("ca.uhn.hl7v2.protocol.impl.check_parse");
                if (check != null && check.equals("TRUE")) {
                    ParseChecker.checkParse(incomingMessageString, incomingMessageObject, myParser);
                }
                
                //message validation (in terms of optionality, cardinality) would go here ***
                
                ReceivingApplication app = findApplication(incomingMessageObject);
                theMetadata.put(RAW_MESSAGE_KEY, incomingMessageString);
                
                log.debug("Sending message to application: {}", app.toString());
                Message response = app.processMessage(incomingMessageObject, theMetadata);
                
                //Here we explicitly use the same encoding as that of the inbound message - this is important with GenericParser, which might use a different encoding by default
                outgoingMessageString = myParser.encode(response, myParser.getEncoding(incomingMessageString));
                
                Terser t = new Terser(response);
                outgoingMessageCharset = t.get(METADATA_KEY_MESSAGE_CHARSET); 
            } catch (Exception e) {
              outgoingMessageString = handleProcessMessageException(incomingMessageString, theMetadata, incomingMessageObject, e);
              if (myContext.getServerConfiguration().getApplicationExceptionPolicy() == ApplicationExceptionPolicy.DO_NOT_RESPOND) {
              outgoingMessageString = null;
            }
 

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351     
    /**
     * Returns the first Application that has been bound to messages of this type.  
     */
    private ReceivingApplication findApplication(Message theMessage) throws HL7Exception {
        Terser t = new Terser(theMessage);
        AppRoutingData msgData = 
            new AppRoutingDataImpl(t.get("/MSH-9-1"), t.get("/MSH-9-2"), t.get("/MSH-11-1"), t.get("/MSH-12"));
            
        ReceivingApplication app = findDestination(theMessage, msgData);
        
        //have to send back an application reject if no apps available to process
        if (app == null) {
 

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83   }


  public ResponseCode getResponseCode() {
    if (myResponseCode == null) {
      try {
        myResponseCode = ResponseCode.detect(new Terser(myMessage).get("/MSA-2"));
        if (myResponseCode == null) {
          throw new HL7Exception("No response code in message, this is probably an error");
        }
      } catch (HL7Exception e) {
        ourLog.info("Could not detect response code in message", e);

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118     public Object unmarshal(Exchange exchange, InputStream inputStream) throws Exception {
        String body = ExchangeHelper.convertToMandatoryType(exchange, String.class, inputStream);
        Message message = HL7Converter.parse(body, parser);


        // add MSH fields as message out headers
        Terser terser = new Terser(message);
        for (Map.Entry<String, String> entry : HEADER_MAP.entrySet()) {
            exchange.getOut().setHeader(entry.getKey(), terser.get(entry.getValue()));
        }
        return message;
    }

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Related Classes of ca.uhn.hl7v2.util.Terser

ca.uhn.hl7v2.app.ActiveInitiator
ca.uhn.hl7v2.app.DefaultApplication
ca.uhn.hl7v2.app.Initiator
ca.uhn.hl7v2.app.MessageTypeRouter
ca.uhn.hl7v2.app.Responder
ca.uhn.hl7v2.conf.check.DefaultValidator
ca.uhn.hl7v2.examples.ExampleUseTerser
ca.uhn.hl7v2.examples.HandlingMultipleVersions
ca.uhn.hl7v2.hoh.hapi.api.MessageSendable
ca.uhn.hl7v2.hoh.relay.sender.RelayHttpSender



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