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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157         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 (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);
            } catch (Error e) {
              log.debug("Caught runtime exception of type {}, going to wrap it as HL7Exception and handle it", e.getClass());
              HL7Exception wrapped = new HL7Exception(e);
 

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322     
    /**
     * 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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65    */
  public String getName() {
    if (StringUtil.isBlank(myName)) {
      String retVal = null;
      try {
        Terser t = new Terser(this);
        retVal = t.get("/MSH-9-3");


        if (StringUtil.isBlank(retVal)) {
          String msh91 = t.get("/MSH-9-1");
          String msh92 = t.get("/MSH-9-2");
          if (StringUtil.isNotBlank(msh91) && StringUtil.isNotBlank(msh92)) {
            retVal = msh91 + "_" + msh92;
          }
        }
      } catch (HL7Exception e) {
 

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117         
        return (ValidationException[]) problems.toArray(new ValidationException[0]);
    }
    
    private String[] getDeclaredProfileIDs(Message theMessage) throws HL7Exception {
        Terser t = new Terser(theMessage);
        boolean noMore = false;
        int c = 0;
        ArrayList declaredProfiles = new ArrayList(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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84     /**
     * @see Validator#validate
     */
    public HL7Exception[] validate(Message message, StaticDef profile) throws ProfileException, HL7Exception {
        ArrayList exList = new ArrayList(20);
        Terser t = new Terser(message);
        
        //check msg type, event type, msg struct ID
        String msgType = t.get("/MSH-9-1");
        if (!msgType.equals(profile.getMsgType())) {
            HL7Exception e =
                new ProfileNotFollowedException("Message type " + msgType + " doesn't match profile type of " + profile.getMsgType());
            exList.add(e);
        }
        
        String evType = t.get("/MSH-9-2");
        if (!evType.equals(profile.getEventType()) && !profile.getEventType().equalsIgnoreCase("ALL")) {
            HL7Exception e =
                new ProfileNotFollowedException("Event type " + evType + " doesn't match profile type of " + profile.getEventType());
            exList.add(e);
        }
        
        String msgStruct = t.get("/MSH-9-3");
        if (msgStruct == null || !msgStruct.equals(profile.getMsgStructID())) {
            HL7Exception e =
                new ProfileNotFollowedException("Message structure " + msgStruct + " doesn't match profile type of " + profile.getMsgStructID());
            exList.add(e);
        }
 

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111         if (out == null) {
            throw new HL7Exception("Can't encode null message", HL7Exception.REQUIRED_FIELD_MISSING);
    }


        //register message with response Receiver(s) (by message ID)
        Terser t = new Terser(out);
        String messID = t.get("/MSH-10");


    if (messID == null || messID.length() == 0) {
      throw new HL7Exception("MSH segment missing required field Control ID (MSH-10)", HL7Exception.REQUIRED_FIELD_MISSING);
    }


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211                     public void run() {
                        try {
                                //get message ID
    String ID = MessageIDGenerator.getInstance().getNewID();
                            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 " + ackID);

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164             out = (Message) ackClass.newInstance();
        }
        catch (Exception e) {
            throw new HL7Exception("Can't instantiate ACK of class " + ackClassName + ": " + e.getClass().getName());
        }
        Terser terser = new Terser(out);


        //populate outbound MSH using data from inbound message ...             
        Segment outHeader = (Segment) out.get("MSH");
        fillResponseHeader(inboundHeader, outHeader);


        terser.set("/MSH-9", "ACK");
        terser.set("/MSH-12", version);
        terser.set("/MSA-1", "AA");
        terser.set("/MSA-2", terser.get(inboundHeader, 10, 0, 1, 1));


        return out;
    }

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108      * Returns the Applications that has been registered to handle 
     * messages of the type and trigger event of the given message, or null if 
     * there are none. 
     */
    private Application getMatchingApplication(Message message) throws HL7Exception {
        Terser t = new Terser(message);
        String messageType = t.get("/MSH-9-1");
        String triggerEvent = t.get("/MSH-9-2");
        return this.getMatchingApplication(messageType, triggerEvent);        
    }
 

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38      *      form required by <code>Terser</code>.  
     * @return a Map from Terser paths to field values 
     */
    public static Map getFields(Message theMessage, List theTerserPaths) throws HL7Exception {
        Map fields = new HashMap();
        Terser terser = new Terser(theMessage);
        for (int i = 0; i < theTerserPaths.size(); i++) {
            String path = (String) theTerserPaths.get(i);
            String fieldValue = terser.get(path);
            fields.put(path, fieldValue);
        }
        return fields;
    }
 

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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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