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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright 2012 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.protocol;
import java.util.Calendar;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class Tr20ProtocolDecoder extends BaseProtocolDecoder {
public Tr20ProtocolDecoder(String protocol) {
super(protocol);
}
static private Pattern patternPing = Pattern.compile(
"\\%\\%[^,]+,(\\d+)");
static private Pattern patternData = Pattern.compile(
"\\%\\%" +
"([^,]+)," + // Id
"([AL])," + // Validity
"(\\d{2})(\\d{2})(\\d{2})" + // Date (YYMMDD)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"([NS])" +
"(\\d{2})(\\d{2}\\.\\d+)" + // Latitude (DDMM.MMMM)
"([EW])" +
"(\\d{3})(\\d{2}\\.\\d+)," + // Longitude (DDDMM.MMMM)
"(\\d+)," + // Speed
"(\\d+)," + // Course
".*");
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
String sentence = (String) msg;
// Keep alive message
Matcher parser = patternPing.matcher(sentence);
if (parser.matches()) {
// Send response
if (channel != null) {
channel.write("&&" + parser.group(1) + "\r\n");
}
} else {
// Data message parse
parser = patternData.matcher(sentence);
// Unknown message
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
position.setProtocol(getProtocol());
Integer index = 1;
// Get device by id
if (!identify(parser.group(index++))) {
return null;
}
position.setDeviceId(getDeviceId());
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
time.set(Calendar.HOUR_OF_DAY, Integer.parseInt(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.parseInt(parser.group(index++)));
time.set(Calendar.SECOND, Integer.parseInt(parser.group(index++)));
position.setTime(time.getTime());
// Latitude
int hemisphere = 1;
if (parser.group(index++).compareTo("S") == 0) hemisphere = -1;
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
position.setLatitude(latitude * hemisphere);
// Longitude
hemisphere = 1;
if (parser.group(index++).compareTo("W") == 0) hemisphere = -1;
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
position.setLongitude(longitude * hemisphere);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)) * 0.539957);
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
return position;
}
return null;
}
}
|
