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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67         return new RouteBuilder() {
            public void configure() throws Exception {
                from("mina2:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec")
                    .process(new Processor() {
                        public void process(Exchange exchange) throws Exception {
                            Message input = exchange.getIn().getBody(Message.class);


                            assertEquals("2.4", input.getVersion());
                            QRD qrd = (QRD)input.get("QRD");
                            assertEquals("0101701234", qrd.getWhoSubjectFilter(0).getIDNumber().getValue());


                            Message response = createHL7AsMessage();
                            exchange.getOut().setBody(response);
                        }
                    })
                    .to("mock:result");
            }

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69         return new RouteBuilder() {
            public void configure() throws Exception {
                from("mina2:tcp://127.0.0.1:" + getPort() + "?sync=true&codec=#hl7codec")
                    .process(new Processor() {
                        public void process(Exchange exchange) throws Exception {
                            Message input = exchange.getIn().getBody(Message.class);


                            assertEquals("2.4", input.getVersion());
                            QRD qrd = (QRD)input.get("QRD");
                            assertEquals("0101701234", qrd.getWhoSubjectFilter(0).getIDNumber().getValue());


                            Message response = createHL7AsMessage();
                            exchange.getOut().setBody(response);
                        }
                    })
                    .to("mock:result");
            }

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88 
    @Test
    public void testDefaultValidationContext() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:test1");
        mock.expectedMessageCount(1);
        Message msg = createADT01Message();
        template.sendBody("direct:test1", msg);
        assertMockEndpointsSatisfied();
    }

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97 
    @Test(expected = CamelExecutionException.class)
    public void testCustomValidationContext() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:test2");
        mock.expectedMessageCount(0);
        Message msg = createADT01Message();
        template.sendBody("direct:test2", msg);
        assertMockEndpointsSatisfied();
    }

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106 
    @Test
    public void testDynamicCustomValidationContext() throws Exception {
        MockEndpoint mock = getMockEndpoint("mock:test3");
        mock.expectedMessageCount(1);
        Message msg = createADT01Message();
        template.sendBodyAndHeader("direct:test3", msg, "validator", defaultContext);
        assertMockEndpointsSatisfied();
    }

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


        // add MSH fields as message out headers
        Terser terser = new Terser(message);
        exchange.getOut().setHeader("hl7.msh.sendingApplication", terser.get("MSH-3"));
        exchange.getOut().setHeader("hl7.msh.sendingFacility", terser.get("MSH-4"));
        exchange.getOut().setHeader("hl7.msh.receivingApplication", terser.get("MSH-5"));
        exchange.getOut().setHeader("hl7.msh.receivingFacility", terser.get("MSH-6"));
        exchange.getOut().setHeader("hl7.msh.timestamp", terser.get("MSH-7"));
        exchange.getOut().setHeader("hl7.msh.security", terser.get("MSH-8"));
        exchange.getOut().setHeader("hl7.msh.messageType", terser.get("MSH-9-1"));
        exchange.getOut().setHeader("hl7.msh.triggerEvent", terser.get("MSH-9-2"));
        exchange.getOut().setHeader("hl7.msh.messageControl", terser.get("MSH-10"));
        exchange.getOut().setHeader("hl7.msh.processingId", terser.get("MSH-11"));
        exchange.getOut().setHeader("hl7.msh.versionId", terser.get("MSH-12"));
        return message;
    }

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


        // add MSH fields as message out headers
        Terser terser = new Terser(message);
        exchange.getOut().setHeader(HL7Constants.HL7_SENDING_APPLICATION, terser.get("MSH-3"));
        exchange.getOut().setHeader(HL7Constants.HL7_SENDING_FACILITY, terser.get("MSH-4"));
        exchange.getOut().setHeader(HL7Constants.HL7_RECEIVING_APPLICATION, terser.get("MSH-5"));
        exchange.getOut().setHeader(HL7Constants.HL7_RECEIVING_FACILITY, terser.get("MSH-6"));
        exchange.getOut().setHeader(HL7Constants.HL7_TIMESTAMP, terser.get("MSH-7"));
        exchange.getOut().setHeader(HL7Constants.HL7_SECURITY, terser.get("MSH-8"));
        exchange.getOut().setHeader(HL7Constants.HL7_MESSAGE_TYPE, terser.get("MSH-9-1"));
        exchange.getOut().setHeader(HL7Constants.HL7_TRIGGER_EVENT, terser.get("MSH-9-2"));
        exchange.getOut().setHeader(HL7Constants.HL7_MESSAGE_CONTROL, terser.get("MSH-10"));
        exchange.getOut().setHeader(HL7Constants.HL7_PROCESSING_ID, terser.get("MSH-11"));
        exchange.getOut().setHeader(HL7Constants.HL7_VERSION_ID, terser.get("MSH-12"));
        return message;
    }

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


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

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360     }
    
    private void parse(StringTokenizer tok, Message message, StructRef root, EncodingCharacters ec) 
            throws HL7Exception {
        
        Terser t = new Terser(message);
        
        synchronized (root) {
            StructRef ref = root.getSuccessor("MSH");            
            
            int field = 0;
            Segment segment = null;
            int[] fields = new int[0];
            
            while (tok.hasMoreTokens()) {
                String token = tok.nextToken();
                if (token.charAt(0) == ec.getFieldSeparator()) {
                    field++;
                } else if (token.charAt(0) == ourSegmentSeparator) {
                    field = 0;
                } else if (field == 0) {
                    StructRef newref = drill(ref, token);
                    if (newref == null) {
                        segment = null;
                        fields = new int[0];
                    } else {
                        ref = newref;
                        ourLog.debug("Parsing into segment {}", ref.getFullPath());
                        segment = t.getSegment(ref.getFullPath());
                        fields = ref.getFields();
                    }
                } else if (segment != null && Arrays.binarySearch(fields, field) >= 0) {
                    parse(token, segment, field, ec);
                }

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177         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");
                }
            }
        }


        // At this point, no exception has occurred and the message is processed normally
        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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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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