HL7MessageController1_8.java

/**
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
 * the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
 *
 * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
 * graphic logo is a trademark of OpenMRS Inc.
 */
package org.openmrs.module.webservices.rest.web.v1_0.controller.openmrs1_8;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.openmrs.api.context.Context;
import org.openmrs.hl7.HL7Source;
import org.openmrs.module.webservices.rest.SimpleObject;
import org.openmrs.module.webservices.rest.web.RequestContext;
import org.openmrs.module.webservices.rest.web.RestConstants;
import org.openmrs.module.webservices.rest.web.RestUtil;
import org.openmrs.module.webservices.rest.web.api.RestService;
import org.openmrs.module.webservices.rest.web.response.ConversionException;
import org.openmrs.module.webservices.rest.web.response.ResponseException;
import org.openmrs.module.webservices.rest.web.v1_0.controller.BaseRestController;
import org.openmrs.module.webservices.rest.web.v1_0.controller.MainResourceController;
import org.openmrs.module.webservices.rest.web.v1_0.resource.openmrs1_8.HL7MessageResource1_8;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import ca.uhn.hl7v2.HL7Exception;
import ca.uhn.hl7v2.model.Message;
import ca.uhn.hl7v2.parser.GenericParser;
import ca.uhn.hl7v2.parser.Parser;
import ca.uhn.hl7v2.util.Terser;

/**
 * Controller for {@link HL7MessageResource1_8}.
 * <p>
 * It is provided, because we want to support posting plain HL7 messages in addition to those in
 * json.
 */
@Controller
public class HL7MessageController1_8 extends BaseRestController {
	
	@Autowired
	@Qualifier("mainResourceController")
	MainResourceController mainResourceController;
	
	@RequestMapping(value = "/rest/" + RestConstants.VERSION_1 + "/hl7", method = RequestMethod.POST)
	@ResponseBody
	public Object create(@RequestBody String hl7, HttpServletRequest request, HttpServletResponse response)
	        throws ResponseException, JsonParseException, JsonMappingException, IOException {
		RequestContext context = RestUtil.getRequestContext(request, response);
		SimpleObject post = new SimpleObject();
		
		if (hl7.trim().startsWith("{")) {
			//hl7 is wrapped up in a json format
			SimpleObject object = SimpleObject.parseJson(hl7);
			hl7 = (String) object.get("hl7");
			if (hl7 == null) {
				throw new ConversionException("Missing the hl7 property");
			}
		}
		
		try {
			Parser parser = new GenericParser();
			Message msg = parser.parse(hl7);
			Terser terser = new Terser(msg);
			
			String source = terser.get("MSH-4");
			String sourceKey = terser.get("MSH-10");
			
			post.add("source", source);
			post.add("sourceKey", sourceKey);
			post.add("data", hl7);
			
			HL7Source hl7Source = Context.getHL7Service().getHL7SourceByName(source);
			if (hl7Source == null) {
				throw new ConversionException("The " + source + " source was not recognized");
			}
		}
		catch (HL7Exception e) {
			throw new ConversionException(e.getMessage(), e);
		}
		
		Object created = ((HL7MessageResource1_8) Context.getService(RestService.class).getResourceByName(
		    RestConstants.VERSION_1 + "/hl7")).create(post, context);
		return RestUtil.created(response, created);
	}
	
	/**
	 * Apparently if we provide a specific request mapping for POST, we also need to provide it for
	 * GET, because otherwise Spring cannot find a more general match from
	 * {@link MainResourceController}.
	 */
	@RequestMapping(value = "/rest/" + RestConstants.VERSION_1 + "/hl7", method = RequestMethod.GET)
	@ResponseBody
	public SimpleObject get(HttpServletRequest request, HttpServletResponse response) throws ResponseException {
		return mainResourceController.get("hl7", request, response);
	}
}