--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Samples/FHIR/src/main/java/PatientProvider.java	Sat Oct 21 09:53:25 2023 +0200
@@ -0,0 +1,104 @@
+/**
+ * SPDX-FileCopyrightText: 2023 Sebastien Jodogne, UCLouvain, Belgium
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+/**
+ * Java plugin for Orthanc
+ * Copyright (C) 2023 Sebastien Jodogne, UCLouvain, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+import be.uclouvain.orthanc.ResourceType;
+import ca.uhn.fhir.rest.annotation.IdParam;
+import ca.uhn.fhir.rest.annotation.OptionalParam;
+import ca.uhn.fhir.rest.annotation.Read;
+import ca.uhn.fhir.rest.annotation.Search;
+import ca.uhn.fhir.rest.param.DateParam;
+import ca.uhn.fhir.rest.param.StringParam;
+import ca.uhn.fhir.rest.server.IResourceProvider;
+import org.hl7.fhir.r5.model.IdType;
+import org.hl7.fhir.r5.model.Patient;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class PatientProvider implements IResourceProvider {
+    private IOrthancConnection orthanc;
+
+    PatientProvider(IOrthancConnection orthanc) {
+        this.orthanc = orthanc;
+    }
+
+    @Override
+    public Class<Patient> getResourceType() {
+        return Patient.class;
+    }
+
+    @Read()
+    public Patient getResourceById(@IdParam IdType theId) {
+        Map<String, String> tags = new HashMap<>();
+        tags.put(Toolbox.TAG_PATIENT_ID, theId.getIdPart());
+
+        List<OrthancResource> resources = OrthancResource.find(orthanc, ResourceType.PATIENT, tags, true);
+        if (resources.size() == 0) {
+            return null;
+        } else if (resources.size() > 1) {
+            throw new RuntimeException("Too many matching resources");
+        } else {
+            return resources.get(0).getFhirPatient();
+        }
+    }
+
+    @Search()
+    public List<Patient> getPatients(@OptionalParam(name = Patient.SP_FAMILY) StringParam theFamilyName,
+                                     @OptionalParam(name = Patient.SP_GIVEN) StringParam theGivenName,
+                                     @OptionalParam(name = Patient.SP_IDENTIFIER) StringParam theIdentifier,
+                                     @OptionalParam(name = Patient.SP_BIRTHDATE) DateParam theBirthDate) {
+        Map<String, String> tags = new HashMap<>();
+
+        if (theFamilyName != null &&
+                theGivenName != null) {
+            tags.put(Toolbox.TAG_PATIENT_NAME, "*" + theFamilyName.getValue() + "*" + theGivenName.getValue() + "*");
+        } else if (theFamilyName != null) {
+            tags.put(Toolbox.TAG_PATIENT_NAME, "*" + theFamilyName.getValue() + "*");
+        } else if (theGivenName != null) {
+            tags.put(Toolbox.TAG_PATIENT_NAME, "*" + theGivenName.getValue() + "*");
+        }
+
+        if (theIdentifier != null) {
+            tags.put(Toolbox.TAG_PATIENT_ID, theIdentifier.getValue());
+        }
+
+        if (theBirthDate != null) {
+            tags.put(Toolbox.TAG_PATIENT_BIRTH_DATE, Toolbox.formatDicomDate(theBirthDate.getValue()));
+        }
+
+        List<OrthancResource> resources = OrthancResource.find(orthanc, ResourceType.PATIENT, tags, false);
+
+        List<Patient> patients = new ArrayList<>();
+        for (OrthancResource resource : resources) {
+            Patient patient = resource.getFhirPatient();
+            if (patient.hasId()) {
+                patients.add(patient);
+            }
+        }
+
+        return patients;
+    }
+}