org.apache.camel.component.hl7

Class HL7DataFormat

java.lang.Object

org.apache.camel.support.ServiceSupport

org.apache.camel.component.hl7.HL7DataFormat

All Implemented Interfaces:

org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.DataFormat, org.apache.camel.spi.DataFormatName, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

public class HL7DataFormat
extends org.apache.camel.support.ServiceSupport
implements org.apache.camel.spi.DataFormat, org.apache.camel.spi.DataFormatName

HL7 DataFormat (supports v2.x of the HL7 protocol).

This data format supports two operations:

• marshal = from Message to String (can be used when returning as response using the HL7 MLLP codec)
• unmarshal = from String to Message (can be used when receiving streamed data from the HL7 MLLP codec). This operation will also enrich the message by adding the MSH fields (MSH-3 to MSH-12) as headers on the message.

Uses the HAPI (HL7 API) for HL7 parsing.

Uses the default GenericParser from the HAPI API. This DataFormat only supports both the EDI based HL7 messages and the XML based messages.

The unmarshal operation adds these MSH fields as headers on the Camel message (key, MSH-field):

• CamelHL7SendingApplication = MSH-3
• CamelHL7SendingFacility = MSH-4
• CamelHL7ReceivingApplication = MSH-5
• CamelHL7ReceivingFacility = MSH-6
• CamelHL7Timestamp = MSH-7
• CamelHL7Security = MSH-8
• CamelHL7MessageType = MSH-9-1
• CamelHL7TriggerEvent = MSH-9-2
• CamelHL7MessageControl = MSH-10
• CamelHL7ProcessingId = MSH-11
• CamelHL7VersionId = MSH-12
• CamelHL7Charset = MSH-18

All headers are String types.

See Also:

HL7MLLPCodec

Field Summary

Fields inherited from class org.apache.camel.support.ServiceSupport

shutdown, shuttingdown, started, starting, stopped, stopping, suspended, suspending

Constructor Summary

Constructors

Constructor and Description
HL7DataFormat()

Method Summary

Modifier and Type	Method and Description
protected void	doStart()
protected void	doStop()
String	getDataFormatName()
ca.uhn.hl7v2.HapiContext	getHapiContext()
ca.uhn.hl7v2.parser.Parser	getParser()
protected String	guessCharsetName(byte[] b, org.apache.camel.Exchange exchange) In HL7 the charset of the message can be set in MSH-18, but you need to decode the input stream in order to be able to read MSH-18.
boolean	isValidate()
void	marshal(org.apache.camel.Exchange exchange, Object body, OutputStream outputStream)
void	setHapiContext(ca.uhn.hl7v2.HapiContext context)
void	setParser(ca.uhn.hl7v2.parser.Parser parser)
void	setValidate(boolean validate)
Object	unmarshal(org.apache.camel.Exchange exchange, InputStream inputStream)

Methods inherited from class org.apache.camel.support.ServiceSupport

doResume, doShutdown, doSuspend, getStatus, getVersion, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HL7DataFormat

public HL7DataFormat()

Method Detail

getDataFormatName

public String getDataFormatName()

Specified by:

getDataFormatName in interface org.apache.camel.spi.DataFormatName

marshal

public void marshal(org.apache.camel.Exchange exchange,
                    Object body,
                    OutputStream outputStream)
             throws Exception

Specified by:

marshal in interface org.apache.camel.spi.DataFormat

Throws:

Exception

unmarshal

public Object unmarshal(org.apache.camel.Exchange exchange,
                        InputStream inputStream)
                 throws Exception

Specified by:

unmarshal in interface org.apache.camel.spi.DataFormat

Throws:

Exception

isValidate

public boolean isValidate()

setValidate

public void setValidate(boolean validate)

getHapiContext

public ca.uhn.hl7v2.HapiContext getHapiContext()

setHapiContext

public void setHapiContext(ca.uhn.hl7v2.HapiContext context)

getParser

public ca.uhn.hl7v2.parser.Parser getParser()

setParser

public void setParser(ca.uhn.hl7v2.parser.Parser parser)

doStart

protected void doStart()
                throws Exception

Specified by:

doStart in class org.apache.camel.support.ServiceSupport

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Specified by:

doStop in class org.apache.camel.support.ServiceSupport

Throws:

Exception

guessCharsetName

protected String guessCharsetName(byte[] b,
                                  org.apache.camel.Exchange exchange)

In HL7 the charset of the message can be set in MSH-18, but you need to decode the input stream in order to be able to read MSH-18. This works well for differentiating e.g. between ASCII, UTF-8 and ISI-8859 charsets, but not for multi-byte charsets like UTF-16, Big5 etc. This method is called to "guess" the initial encoding, and subclasses can overwrite it using 3rd party libraries like ICU4J that provide a CharsetDetector. The implementation in this class just assumes the charset defined in the exchange property or header by calling IOHelper.getCharsetName(org.apache.camel.Exchange).

Parameters:

b - byte array

exchange - the exchange

Returns:

charset name