/*
* Copyright (c) 2005-2010, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. licenses this file to you under the Apache License,
* Version 2.0 (the "License"); you may not use this file except
* in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.wso2.carbon.business.messaging.hl7.message;
import ca.uhn.hl7v2.HL7Exception;
import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.parser.DefaultXMLParser;
import ca.uhn.hl7v2.parser.PipeParser;
import ca.uhn.hl7v2.validation.impl.NoValidation;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMOutputFormat;
import org.apache.axiom.soap.SOAPFault;
import org.apache.axis2.AxisFault;
import org.apache.axis2.Constants;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.transport.MessageFormatter;
import org.apache.axis2.transport.http.util.URLTemplatingUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.business.messaging.hl7.common.HL7Constants;
import org.wso2.carbon.business.messaging.hl7.common.HL7ProcessingContext;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URL;
public class HL7MessageFormatter implements MessageFormatter {
private static final Log log = LogFactory.getLog(HL7MessageFormatter.class);
private DefaultXMLParser xmlParser;
private PipeParser pipeParser;
public HL7MessageFormatter() {
this.xmlParser = new DefaultXMLParser();
this.pipeParser = new PipeParser();
this.xmlParser.setValidationContext(new NoValidation());
this.pipeParser.setValidationContext(new NoValidation());
}
/**
* {@inheritdoc }*
*/
public byte[] getBytes(MessageContext messageContext, OMOutputFormat omOutputFormat)
throws AxisFault {
return new byte[0];
}
/**
* {@inheritdoc }*
*/
public void writeTo(MessageContext msgCtx,
OMOutputFormat omOutputFormat,
OutputStream outputStream,
boolean b) throws AxisFault {
OMElement omElement = msgCtx.getEnvelope().getBody().getFirstElement().getFirstElement();
if(omElement == null) {
omElement = msgCtx.getEnvelope().getBody().getFirstElement();
}
HL7ProcessingContext processingCtx;
try {
/* The AxisService retrieved at this point from the
* message context is not the correct one */
processingCtx = new HL7ProcessingContext(true, false,false, null, null,null,null,null,null,true,true);
} catch (Exception e) {
throw new AxisFault(e.getMessage(), e);
}
if (log.isDebugEnabled()) {
log.debug("Inside the HL7 formatter: " + omElement.toString());
}
if (msgCtx.getFLOW() == MessageContext.OUT_FAULT_FLOW || msgCtx.getEnvelope().hasFault()) {
SOAPFault soapFault = msgCtx.getEnvelope().getBody().getFault();
try {
Message message = processingCtx.createNack((Message) msgCtx.getProperty(
HL7Constants.HL7_MESSAGE_OBJECT), soapFault.getReason().getText());
if (log.isDebugEnabled()) {
log.debug("Generate HL7 error: " + message);
}
this.writeMessageOut(message, outputStream, msgCtx);
} catch (HL7Exception e) {
throw new AxisFault("Error on creating HL7 Error segment: " + e.getMessage(), e);
} catch (IOException e) {
throw new AxisFault("Error on writing HL7 Error to output stream: " +
e.getMessage(), e);
}
} else {
try {
String xmlFormat;
Message message;
Boolean isValid = (Boolean) msgCtx.getProperty(HL7Constants.HL7_VALIDATION_PASSED);
if((isValid != null && !isValid) && msgCtx.getProperty(HL7Constants.HL7_PASS_THROUGH_INVALID_MESSAGES).equals(true)) {
// pass through invalid messages
message = (Message) msgCtx.getProperty(HL7Constants.HL7_MESSAGE_OBJECT);
} else {
xmlFormat = omElement.toString();
message = this.xmlParser.parse(xmlFormat);
}
if (log.isDebugEnabled()) {
log.debug("Message inside the formatter: " + message);
}
if (this.isGenerateMessageAck(msgCtx)) {
message = this.createGeneratedMessageAck(processingCtx, message, msgCtx);
}
this.writeMessageOut(message, outputStream, msgCtx);
} catch (Exception e) {
throw new AxisFault("Error occurred during HL7 message creation: " +
e.getMessage(), e);
}
}
}
private Message createGeneratedMessageAck(HL7ProcessingContext processingCtx,
Message message, MessageContext msgCtx) throws HL7Exception, AxisFault {
try {
return processingCtx.handleHL7Result(msgCtx, message);
} catch (HL7Exception e) {
return processingCtx.createNack(null, e.getMessage());
}
}
private boolean isGenerateMessageAck(MessageContext msgCtx) {
Object param = msgCtx.getProperty(HL7Constants.HL7_GENERATE_ACK);
if (param != null) {
return Boolean.parseBoolean(param.toString());
} else {
return false;
}
}
private void writeMessageOut(Message message, OutputStream out,
MessageContext msgCtx) throws IOException, HL7Exception {
msgCtx.setProperty(Constants.Configuration.CONTENT_TYPE,
HL7Constants.HL7_CONTENT_TYPE);
String txtMsg = this.pipeParser.encode(message);
if(null == msgCtx.getProperty(HL7Constants.HL7_MESSAGE_CHARSET)) {
out.write(txtMsg.getBytes());
} else {
String charSet = (String) msgCtx.getProperty(HL7Constants.HL7_MESSAGE_CHARSET);
out.write(txtMsg.getBytes(charSet));
}
out.flush();
}
/**
* {@inheritdoc }*
*/
public String getContentType(MessageContext msgCtx,
OMOutputFormat omOutputFormat,
String s) {
String contentType = (String) msgCtx.getProperty(Constants.Configuration.CONTENT_TYPE);
if (contentType == null) {
contentType = HL7Constants.HL7_CONTENT_TYPE;
}
String encoding = omOutputFormat.getCharSetEncoding();
if (encoding != null) {
contentType += "; charset=" + encoding;
}
return contentType;
}
/**
* {@inheritdoc }*
*/
public URL getTargetAddress(MessageContext messageContext,
OMOutputFormat omOutputFormat,
URL targetURL) throws AxisFault {
return URLTemplatingUtil.getTemplatedURL(targetURL, messageContext, false);
}
/**
* {@inheritdoc }*
*/
public String formatSOAPAction(MessageContext messageContext,
OMOutputFormat omOutputFormat,
String soapAction) {
return soapAction;
}
}