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-rw-r--r--src/org/traccar/DistanceHandler.java59
1 files changed, 59 insertions, 0 deletions
diff --git a/src/org/traccar/DistanceHandler.java b/src/org/traccar/DistanceHandler.java
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+/*
+ * Copyright 2015 Amila Silva
+ *
+ * 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.traccar;
+
+import org.traccar.helper.DistanceCalculator;
+import org.traccar.model.Event;
+import org.traccar.model.Position;
+
+import java.math.BigDecimal;
+
+public class DistanceHandler extends BaseDataHandler {
+
+ private Position getLastPosition(long deviceId) {
+ if (Context.getConnectionManager() != null) {
+ return Context.getConnectionManager().getLastPosition(deviceId);
+ }
+ return null;
+ }
+
+ public Position calculateDistance(Position position) {
+
+ double distance = 0.0;
+
+ Position last = getLastPosition(position.getDeviceId());
+ if (last != null) {
+ if (last.getOther().containsKey(Event.KEY_DISTANCE)) {
+ distance = ((Number) last.getOther().get(Event.KEY_DISTANCE)).doubleValue();
+ }
+
+ distance += DistanceCalculator.distance(
+ position.getLatitude(), position.getLongitude(),
+ last.getLatitude(), last.getLongitude());
+
+ distance = BigDecimal.valueOf(distance).setScale(2).doubleValue();
+ }
+
+ position.set(Event.KEY_DISTANCE, distance);
+ return position;
+ }
+
+ @Override
+ protected Position handlePosition(Position position) {
+ return calculateDistance(position);
+ }
+
+}