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https://github.com/giosil/wfhir

A simple HL7 FHIR implementation.
https://github.com/giosil/wfhir

fhir healtcare health health-data hl7 hl7-fhir java

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A simple HL7 FHIR implementation.

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README

          

# WFHIR

A simple HL7© FHIR© implementation.

This library contains:

- FHIR resources as POJO beans (see [org.dew.fhir.model](src/main/java/org/dew/fhir/model));
- serialization and deserialization utilities (see [FHIRUtil](src/main/java/org/dew/fhir/util/FHIRUtil.java));
- base servlet to implement own services endpoint (see [FHIRServlet](src/main/java/org/dew/fhir/server/FHIRServlet.java));
- classes and interfaces to implement FHIR services (see [IFHIRService](src/main/java/org/dew/fhir/services/IFHIRService.java));
- client to invoke RESTful API (see [FHIRClient](src/main/java/org/dew/fhir/client/FHIRClient.java)).

This library DON'T contains:

- persistence engine of resources;
- user interfaces or viewers;
- tools for server/resources management.

## Serialization and Deserialization

The format RDF/Turtle is not supported.

```java
import org.dew.fhir.model.*;
import org.dew.fhir.util.FHIRUtil;

Organization res = new Organization("120201", "http://hl7.it/sid/fls", "120201", "ASL ROMA 1");

String json = FHIRUtil.serialize(res, "application/fhir+json");

String xml = FHIRUtil.serialize(res, "application/fhir+xml");

Organization o1 = FHIRUtil.deserialize(json, Organization.class);

Organization o2 = FHIRUtil.deserialize(xml, Organization.class);
```

## Client

```java
import org.dew.fhir.client.FHIRClient;
import org.dew.fhir.model.*;

FHIRClient client = new FHIRClient("http://localhost:8080/wfhir/fhir");
client.setBasicAuth("test", "test");

try {
FHIRRequest req = new FHIRRequest();

FHIRResponse res = client.read(req.type("organization").id("120201"));

Resource resource = res.getResource();

OperationOutcome outcome = res.getOutcome();
}
catch(Exception ex) {
ex.printStackTrace();
}
```

```java
import org.dew.fhir.client.FHIRClient;
import org.dew.fhir.model.*;

FHIRClient client = new FHIRClient("http://localhost:8080/wfhir/fhir", "organization");
client.setBasicAuth("test", "test");

try {
FHIRRequest req = new FHIRRequest();

FHIRResponse res = client.read(req.id("120201"));

Resource resource = res.getResource();

OperationOutcome outcome = res.getOutcome();
}
catch(Exception ex) {
ex.printStackTrace();
}
```

## Services endpoint

```java
import java.security.Principal;

import javax.servlet.ServletException;

import org.dew.fhir.mock.MockOrganizationService;

public
class TestServlet extends FHIRServlet
{
private static final long serialVersionUID = 1L;

@Override
public
void init()
throws ServletException
{
baseLocation = null;
checkSession = false;
checkSessionName = "user";
basicAuth = true;
basicRealm = "wfhir";

services.addHandler("organization", new MockOrganizationService());
}

@Override
protected
Principal authenticate(String username, String password)
{
if(!username.equals(password)) return null;
return new FHIRPrincipal(username);
}
}
```

## Service

```java
import java.util.Map;

import org.dew.fhir.model.Bundle;
import org.dew.fhir.model.OperationOutcome;
import org.dew.fhir.model.Organization;
import org.dew.fhir.model.Resource;

import org.dew.fhir.services.FHIRRequest;
import org.dew.fhir.services.FHIRResponse;
import org.dew.fhir.services.IFHIRService;

public
class MockOrganizationService implements IFHIRService
{
@Override
public
FHIRResponse read(FHIRRequest request)
throws Exception
{
String id = request.getId();

Organization resource = new Organization("120201", "http://hl7.it/sid/fls", "120201", "ASL ROMA 1");

return new FHIRResponse(resource).id(id);
}

@Override
public
FHIRResponse vread(FHIRRequest request)
throws Exception
{
String id = request.getId();
String vid = request.getVid();

Organization resource = new Organization("120201", "http://hl7.it/sid/fls", "120201", "ASL ROMA 1");

return new FHIRResponse(resource).id(id).vid(vid);
}

@Override
public
FHIRResponse update(FHIRRequest request)
throws Exception
{
Resource resource = request.getResource();

return new FHIRResponse(resource).vid("2");
}

@Override
public
FHIRResponse patch(FHIRRequest request)
throws Exception
{
Resource resource = request.getResource();

return new FHIRResponse(resource).vid("3");
}

@Override
public
FHIRResponse delete(FHIRRequest request)
throws Exception
{
String id = request.getId();

OperationOutcome operationOutcome = new OperationOutcome("information", "informational", "Success");

return new FHIRResponse(operationOutcome).vid(id);
}

@Override
public
FHIRResponse history(FHIRRequest request)
throws Exception
{
String id = request.getId();
String vid = request.getVid();

Organization resource = new Organization("120201", "http://hl7.it/sid/fls", "120201", "ASL ROMA 1");

return new FHIRResponse(resource).id(id).vid(vid);
}

@Override
public
FHIRResponse create(FHIRRequest request)
throws Exception
{
Resource resource = request.getResource();

return new FHIRResponse(resource).vid("1");
}

@Override
public FHIRResponse search(FHIRRequest request)
throws Exception
{
Map parameters = request.getParameters();
System.out.println(parameters);

Organization resource = new Organization("120201", "http://hl7.it/sid/fls", "120201", "ASL ROMA 1");

Bundle bundle = new Bundle("searchset");
bundle.addLink("self", request.getBase(), request.getType(), resource);

return new FHIRResponse(bundle);
}
}
```

## Build

- `git clone https://github.com/giosil/wfhir.git`
- `mvn clean install -f pom2.xml` - this install wfhir as library
- `mvn clean install` - this create the war file
- `docker build -t wfhir .` - this will create a Docker image named wfhir
- `docker run --rm -it -p 8080:8080 wfhir` - To run image named wfhir

## Contributors

* [Giorgio Silvestris](https://github.com/giosil)