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/*
* 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;
}
}
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