/* * Copyright 2016 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; import org.traccar.helper.DistanceCalculator; import org.traccar.model.Position; public class CoordinatesHandler extends BaseDataHandler { private final int coordinatesMinError; private final int coordinatesMaxError; public CoordinatesHandler() { Config config = Context.getConfig(); coordinatesMinError = config.getInteger("coordinates.minError"); coordinatesMaxError = config.getInteger("coordinates.maxError"); } private Position getLastPosition(long deviceId) { if (Context.getIdentityManager() != null) { return Context.getIdentityManager().getLastPosition(deviceId); } return null; } @Override protected Position handlePosition(Position position) { Position last = getLastPosition(position.getDeviceId()); if (last != null && last.getValid() && last.getLatitude() != 0 && last.getLongitude() != 0) { double distance = DistanceCalculator.distance( position.getLatitude(), position.getLongitude(), last.getLatitude(), last.getLongitude()); 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()); } } return position; } }