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author | Anton Tananaev <anton.tananaev@gmail.com> | 2019-02-23 15:33:33 -0800 |
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committer | Anton Tananaev <anton.tananaev@gmail.com> | 2019-02-23 15:33:33 -0800 |
commit | b7d48127e60bcaa5d01f45d8df5203f28f9a1667 (patch) | |
tree | a5c6c85460775db357b39e8ac401db3c8d218dc6 /src/org/traccar/handler/DistanceHandler.java | |
parent | 563243a8da888244e910a4a7a10fb86ad525fdd4 (diff) | |
download | traccar-server-b7d48127e60bcaa5d01f45d8df5203f28f9a1667.tar.gz traccar-server-b7d48127e60bcaa5d01f45d8df5203f28f9a1667.tar.bz2 traccar-server-b7d48127e60bcaa5d01f45d8df5203f28f9a1667.zip |
Refactor distance handler
Diffstat (limited to 'src/org/traccar/handler/DistanceHandler.java')
-rw-r--r-- | src/org/traccar/handler/DistanceHandler.java | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/org/traccar/handler/DistanceHandler.java b/src/org/traccar/handler/DistanceHandler.java new file mode 100644 index 000000000..a336a884e --- /dev/null +++ b/src/org/traccar/handler/DistanceHandler.java @@ -0,0 +1,82 @@ +/* + * 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; + } + +} |