blob: c26ac786ffede2f48259aab675f347556ff2aa00 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* Copyright 2015 Amila Silva
* Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
*
* 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;
import java.math.RoundingMode;
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.getAttributes().containsKey(Event.KEY_DISTANCE)) {
distance = ((Number) last.getAttributes().get(Event.KEY_DISTANCE)).doubleValue();
}
if (position.getValid()) {
distance += DistanceCalculator.distance(
position.getLatitude(), position.getLongitude(),
last.getLatitude(), last.getLongitude());
distance = BigDecimal.valueOf(distance).setScale(2, RoundingMode.HALF_EVEN).doubleValue();
}
}
position.set(Event.KEY_DISTANCE, distance);
return position;
}
@Override
protected Position handlePosition(Position position) {
return calculateDistance(position);
}
}
|
