1 files changed, 87 insertions, 0 deletions
diff --git a/src/main/java/org/onap/a1pesimulator/service/ue/RanUeServiceImpl.java b/src/main/java/org/onap/a1pesimulator/service/ue/RanUeServiceImpl.java
new file mode 100644
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--- /dev/null
+++ b/src/main/java/org/onap/a1pesimulator/service/ue/RanUeServiceImpl.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2021 Samsung Electronics
+ * Licensed 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.onap.a1pesimulator.service.ue;
+
+import java.util.Collection;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import org.onap.a1pesimulator.data.cell.CellDetails;
+import org.onap.a1pesimulator.data.ue.RanUserEquipment;
+import org.onap.a1pesimulator.data.ue.UserEquipment;
+import org.onap.a1pesimulator.service.cell.RanCellsHolder;
+import org.onap.a1pesimulator.service.distance.DistanceService;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+@Service
+public class RanUeServiceImpl implements RanUeService {
+
+    private static final Logger log = LoggerFactory.getLogger(RanUeServiceImpl.class);
+
+    private final RanUeHolder ueHolder;
+    private final RanCellsHolder ranCellsHolder;
+    private final DistanceService distanceService;
+
+    public RanUeServiceImpl(RanUeHolder ueHolder, RanCellsHolder ranCellsHolder, DistanceService distanceService) {
+        this.ueHolder = ueHolder;
+        this.ranCellsHolder = ranCellsHolder;
+        this.distanceService = distanceService;
+    }
+
+    @Override
+    public Collection<UserEquipment> getUserEquipments() {
+        return ueHolder.getUserEquipments();
+    }
+
+    @Override
+    public RanUserEquipment getUes() {
+        Collection<UserEquipment> uesCollection = ueHolder.getUserEquipments();
+        return new RanUserEquipment(uesCollection, uesCollection.size());
+    }
+
+    @Override
+    public Collection<UserEquipment> getUserEquipmentsConnectedToCell(String cellId) {
+        return ueHolder.getUserEquipmentsConnectedToCell(cellId);
+    }
+
+    @Override
+    public Optional<UserEquipment> getUserEquipment(String id) {
+        Optional<UserEquipment> userEquipment = ueHolder.getUserEquipment(id);
+        userEquipment.ifPresent(ue -> ue.setCellsInRange(getCellsIdsInRange(ue)));
+        return userEquipment;
+    }
+
+    @Override
+    public void handover(String ueId, String cellId) {
+        Optional<UserEquipment> userEquipment = getUserEquipment(ueId);
+        if (!userEquipment.isPresent()) {
+            log.warn("Cannot handover ue {} to cell {}, because ue does not exist!", ueId, cellId);
+            return;
+        }
+        userEquipment.get().setCellId(cellId);
+    }
+
+    @Override
+    public boolean canHandover(String ueId, String cellId) {
+        Optional<UserEquipment> userEquipment = getUserEquipment(ueId);
+        return userEquipment.map(equipment -> equipment.getCellsInRange().stream().anyMatch(cellId::equalsIgnoreCase))
+                       .orElse(false);
+    }
+
+    private Collection<String> getCellsIdsInRange(UserEquipment ue) {
+        return ranCellsHolder.getAllCells().stream().filter(cell -> distanceService.isInRange(cell, ue))
+                       .map(CellDetails::getId).collect(Collectors.toList());
+    }
+}