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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            @Override
            public Object evaluate(Exchange exchange) {
                Message message = exchange.getIn().getBody(Message.class);
                try {
                    return new Terser(message).get(expression.trim());
                } catch (HL7Exception e) {
                    throw ObjectHelper.wrapRuntimeCamelException(e);
                }
            }


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64         assertTrue(xml.contains("<ORM_O01"));
        template.sendBody("direct:unmarshalOkXml", xml);


        assertMockEndpointsSatisfied();
        Message received = mock.getReceivedExchanges().get(0).getIn().getMandatoryBody(Message.class);
        assertEquals("O01", new Terser(received).get("MSH-9-2"));
    }    

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110       }
    
      break;
    }
    
    String responseControlId = new Terser(response.getMessage()).get("/MSH-10");
    ourLog.info("Received response to ID {} with ID {} in {} ms", new Object[] {controlId, responseControlId, delay});
    
    return response.getMessage();
  }

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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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62         assertTrue(xml.contains("<ORM_O01"));
        template.sendBody("direct:unmarshalOkXml", xml);


        assertMockEndpointsSatisfied();
        Message received = mock.getReceivedExchanges().get(0).getIn().getMandatoryBody(Message.class);
        assertEquals("O01", new Terser(received).get("MSH-9-2"));
    }    

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139         // using the standard version-specific model classes
        parser = new PipeParser();


        // 20169838-v23
        Message v23Message = parser.parse(v23message);
        Terser t23 = new Terser(v23Message);
        System.out.println(t23.get("/MSH-10"));


        // 20169838-v25
        Message v25Message = parser.parse(v25message);
        Terser t25 = new Terser(v25Message);
        System.out.println(t25.get("/MSH-10"));
        
        /*
         * Note that this second technique has one major drawback: Although 
         * message definitions are backwards compatible, some group names
         * change between versions. If you are accessing a group within
         * a complex message structure, this can cause issues.
         * 
         * This is less of an issue for some message types where groups are
         * not used much (e.g. ADT)
         */


        // This works and prints "Test Value"
        System.out.println(t23.get("/RESPONSE/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));


        // This fails...
        // System.out.println(t25.get("/RESPONSE/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));
        
        // ...because this would be required to extract the OBX-5 value from a v2.5 message
        System.out.println(t25.get("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));
        
  }
 

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108         /*
         * Another way of reading messages is to use a Terser. The terser 
         * accepts a particular syntax to retrieve segments. See the API
         * documentation for the Terser for more information.
         */
        Terser terser = new Terser(hapiMsg);
        
        /* 
         * Sending Application is in MSH-3-1 (the first component of the third
         * field of the MSH segment)
         */ 
        String sendingApplication = terser.get("/.MSH-3-1");
        System.out.println(sendingApplication);
        // HIS
        
        /*
         * We can use brackets to get particular repetitions
         */
        String secondAllergyType = terser.get("/AL1(1)-3-2");
        System.out.println(secondAllergyType);
        // DUST
        
        // We can also use the terser to set values
        terser.set("/.MSH-3-1", "new_sending_app");
        
        // Let's try something more complicated, adding values to an OBX in an ORU^R01
        ORU_R01 oru = new ORU_R01();
        oru.getMSH().getEncodingCharacters().setValue("^~\\&");
        oru.getMSH().getFieldSeparator().setValue("|");
        oru.getMSH().getMessageType().getMessageCode().setValue("ORU");
        oru.getMSH().getMessageType().getTriggerEvent().setValue("R01");
        oru.getMSH().getVersionID().getVersionID().setValue("2.5");
        
        terser = new Terser(oru);
        for (int i = 0; i < 5; i++) {
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-1", "" + (i + 1));
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-3", "ST");
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-5", "This is the value for rep " + i);
        }
        
        System.out.println(p.encode(oru));
        
        /*
  

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139         // using the standard version-specific model classes
        parser = new PipeParser();


        // 20169838-v23
        Message v23Message = parser.parse(v23message);
        Terser t23 = new Terser(v23Message);
        System.out.println(t23.get("/MSH-10"));


        // 20169838-v25
        Message v25Message = parser.parse(v25message);
        Terser t25 = new Terser(v25Message);
        System.out.println(t25.get("/MSH-10"));
        
        /*
         * Note that this second technique has one major drawback: Although 
         * message definitions are backwards compatible, some group names
         * change between versions. If you are accessing a group within
         * a complex message structure, this can cause issues.
         * 
         * This is less of an issue for some message types where groups are
         * not used much (e.g. ADT)
         */


        // This works and prints "Test Value"
        System.out.println(t23.get("/RESPONSE/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));


        // This fails...
        // System.out.println(t25.get("/RESPONSE/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));
        
        // ...because this would be required to extract the OBX-5 value from a v2.5 message
        System.out.println(t25.get("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(0)/OBX-5"));
        
  }
 

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108         /*
         * Another way of reading messages is to use a Terser. The terser 
         * accepts a particular syntax to retrieve segments. See the API
         * documentation for the Terser for more information.
         */
        Terser terser = new Terser(hapiMsg);
        
        /* 
         * Sending Application is in MSH-3-1 (the first component of the third
         * field of the MSH segment)
         */ 
        String sendingApplication = terser.get("/.MSH-3-1");
        System.out.println(sendingApplication);
        // HIS
        
        /*
         * We can use brackets to get particular repetitions
         */
        String secondAllergyType = terser.get("/AL1(1)-3-2");
        System.out.println(secondAllergyType);
        // DUST
        
        // We can also use the terser to set values
        terser.set("/.MSH-3-1", "new_sending_app");
        
        // Let's try something more complicated, adding values to an OBX in an ORU^R01
        ORU_R01 oru = new ORU_R01();
        oru.getMSH().getEncodingCharacters().setValue("^~\\&");
        oru.getMSH().getFieldSeparator().setValue("|");
        oru.getMSH().getMessageType().getMessageCode().setValue("ORU");
        oru.getMSH().getMessageType().getTriggerEvent().setValue("R01");
        oru.getMSH().getVersionID().getVersionID().setValue("2.5");
        
        terser = new Terser(oru);
        for (int i = 0; i < 5; i++) {
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-1", "" + (i + 1));
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-3", "ST");
            terser.set("/PATIENT_RESULT/ORDER_OBSERVATION/OBSERVATION(" + i + ")/OBX-5", "This is the value for rep " + i);
        }
        
        System.out.println(p.encode(oru));
        
        /*
  

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172       String version = inbound.getVersion();
      if (version == null)
        version = "2.4";
      clazz = mcf.getMessageClass("ACK", version, false);
      Message out = clazz.newInstance();
      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-9-1", "ACK");
      terser.set("/MSH-9-2", Terser.get(inboundHeader, 9, 0, 2, 1));
      terser.set("/MSH-12", Terser.get(inboundHeader, 12, 0, 1, 1));
      terser.set("/MSA-1", "AA");
      terser.set("/MSA-2", Terser.get(inboundHeader, 10, 0, 1, 1));
      return out;


    } catch (Exception e) {
      throw new HL7Exception("Can't instantiate ACK of class "
          + clazz.getName(), 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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