connect patient to postgres

pom.xml

@@ -34,6 +34,13 @@
 			<scope>runtime</scope>
 		</dependency>>
 
+       <!-- Support for JSON columns in hibernate-->
+        <dependency>
+            <groupId>com.vladmihalcea</groupId>
+            <artifactId>hibernate-types-52</artifactId>
+            <version>2.11.1</version>
+        </dependency>
+
 		<!-- This dependency includes the core HAPI-FHIR classes -->
         <dependency>
             <groupId>ca.uhn.hapi.fhir</groupId>

src/main/java/com/example/fhirserver/entities/PatientEntity.java

@@ -0,0 +1,39 @@
+package com.example.fhirserver.entities;
+
+import com.vladmihalcea.hibernate.type.json.JsonType;
+import org.hibernate.annotations.TypeDef;
+import org.hibernate.annotations.TypeDefs;
+import org.hl7.fhir.r4.model.Patient;
+import org.springframework.data.jpa.domain.support.AuditingEntityListener;
+
+import javax.persistence.*;
+import java.io.Serializable;
+
+@TypeDefs({ @TypeDef(name = "json", typeClass = JsonType.class) })
+@Entity
+@Table(name = "fhir_patient")
+@EntityListeners(AuditingEntityListener.class)
+public class PatientEntity implements Serializable {
+
+	// we need _id to be generated safely in conjunction with other clients of
+	// the postgres table.
+	// To find your table's sequence, run:
+	// select c.relname from pg_class c where c.relkind = 'S';
+	@Id
+	@Column(name = "_id")
+	@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "patient_id_generator")
+	@SequenceGenerator(name = "patient_id_generator", sequenceName = "fhir_patient__id_seq", allocationSize = 1)
+	private long id;
+
+	@Type(type = "json")
+	@Column(name = "resource", nullable = false, columnDefinition = "jsonb")
+	private Patient resource;
+
+	public long getId() {
+		return id;
+	}
+
+	public Patient getResource() {
+		return resource;
+	}
+}

src/main/java/com/example/fhirserver/providers/PatientProvider.java

@@ -2,26 +2,32 @@
 
 import ca.uhn.fhir.rest.annotation.*;
 import ca.uhn.fhir.rest.server.IResourceProvider;
+import ca.uhn.fhir.rest.server.exceptions.ResourceNotFoundException;
+import com.example.fhirserver.repositories.PatientRepository;
+import com.example.fhirserver.entities.PatientEntity;
 import org.hl7.fhir.r4.model.IdType;
 import org.hl7.fhir.r4.model.Patient;
+import org.hl7.fhir.r4.model.ResourceType;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
 @Component
 public class PatientProvider implements IResourceProvider {
 
+	@Autowired
+	private PatientRepository patientRepository;
+
     @Override
 	public Class<Patient> getResourceType() {
 		return Patient.class;
 	}
 
 	@Read()
 	public Patient read(@IdParam IdType theId) {
-
-        // Create a dummy Patient resource to return
-        // in reality, we'd use theId to query the database!
-        Patient patient = new Patient();
-        patient.addName().setFamily("Lord").addGiven("Farquaad");
-        return patient;
+		Long resourceId = theId.getIdPartAsLong();
+		return this.patientRepository.findById(resourceId).map(PatientEntity::getResource)
+				.orElseThrow(() -> new ResourceNotFoundException(
+						String.format("Could not find %s with id=%d", ResourceType.Patient.name(), resourceId)));
 	}
 
 }

src/main/java/com/example/fhirserver/repositories/PatientRepository.java

@@ -0,0 +1,6 @@
+package com.example.fhirserver.repositories;
+
+import com.example.fhirserver.entities.PatientEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface PatientRepository extends JpaRepository<PatientEntity, Long> {}