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-rw-r--r--src/main/java/org/traccar/handler/DistanceHandler.java82
1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/handler/DistanceHandler.java b/src/main/java/org/traccar/handler/DistanceHandler.java
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+/*
+ * Copyright 2015 Amila Silva
+ * Copyright 2016 - 2019 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.handler;
+
+import io.netty.channel.ChannelHandler;
+import org.traccar.BaseDataHandler;
+import org.traccar.config.Config;
+import org.traccar.config.Keys;
+import org.traccar.database.IdentityManager;
+import org.traccar.helper.DistanceCalculator;
+import org.traccar.model.Position;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+@ChannelHandler.Sharable
+public class DistanceHandler extends BaseDataHandler {
+
+ private final IdentityManager identityManager;
+
+ private final boolean filter;
+ private final int coordinatesMinError;
+ private final int coordinatesMaxError;
+
+ public DistanceHandler(Config config, IdentityManager identityManager) {
+ this.identityManager = identityManager;
+ this.filter = config.getBoolean(Keys.COORDINATES_FILTER);
+ this.coordinatesMinError = config.getInteger(Keys.COORDINATES_MIN_ERROR);
+ this.coordinatesMaxError = config.getInteger(Keys.COORDINATES_MAX_ERROR);
+ }
+
+ @Override
+ protected Position handlePosition(Position position) {
+
+ double distance = 0.0;
+ if (position.getAttributes().containsKey(Position.KEY_DISTANCE)) {
+ distance = position.getDouble(Position.KEY_DISTANCE);
+ }
+ double totalDistance = 0.0;
+
+ Position last = identityManager != null ? identityManager.getLastPosition(position.getDeviceId()) : null;
+ if (last != null) {
+ totalDistance = last.getDouble(Position.KEY_TOTAL_DISTANCE);
+ if (!position.getAttributes().containsKey(Position.KEY_DISTANCE)) {
+ distance = DistanceCalculator.distance(
+ position.getLatitude(), position.getLongitude(),
+ last.getLatitude(), last.getLongitude());
+ distance = BigDecimal.valueOf(distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+ }
+ if (filter && last.getValid() && last.getLatitude() != 0 && last.getLongitude() != 0) {
+ boolean satisfiesMin = coordinatesMinError == 0 || distance > coordinatesMinError;
+ boolean satisfiesMax = coordinatesMaxError == 0
+ || distance < coordinatesMaxError || position.getValid();
+ if (!satisfiesMin || !satisfiesMax) {
+ position.setLatitude(last.getLatitude());
+ position.setLongitude(last.getLongitude());
+ distance = 0;
+ }
+ }
+ }
+ position.set(Position.KEY_DISTANCE, distance);
+ totalDistance = BigDecimal.valueOf(totalDistance + distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
+ position.set(Position.KEY_TOTAL_DISTANCE, totalDistance);
+
+ return position;
+ }
+
+}