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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* 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.ServerManager;
import org.traccar.helper.Log;
import org.traccar.model.Position;
/**
* Meitrack protocol decoder
*/
public class MeitrackProtocolDecoder extends BaseProtocolDecoder {
/**
* Initialize
*/
public MeitrackProtocolDecoder(ServerManager serverManager) {
super(serverManager);
}
/**
* Regular expressions pattern
*/
static private Pattern pattern = Pattern.compile(
"\\$\\$." + // Flag
"\\d+," + // Length
"(\\d+)," + // IMEI
"[0-9a-fA-F]{3}," + // Command
"(\\d+)," + // Event
"(-?\\d+\\.\\d+)," + // Latitude
"(-?\\d+\\.\\d+)," + // Longitude
"(\\d{2})(\\d{2})(\\d{2})" + // Date (YYMMDD)
"(\\d{2})(\\d{2})(\\d{2})," + // Time (HHMMSS)
"([AV])," + // Validity
"(\\d+)," + // Satellites
"(\\d+)," + // GSM Signal
"(\\d+)," + // Speed
"(\\d+)," + // Course
"(\\d+)," + // HDOP
"(\\d+)," + // Altitude
"(\\d+)," + // Milage
".*"); // TODO: parse other stuff
/**
* Decode message
*/
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
// Parse message
String sentence = (String) msg;
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
StringBuilder extendedInfo = new StringBuilder("<protocol>meitrack</protocol>");
Integer index = 1;
// Get device by IMEI
String imei = parser.group(index++);
try {
position.setDeviceId(getDataManager().getDeviceByImei(imei).getId());
} catch(Exception error) {
Log.warning("Unknown device - " + imei);
return null;
}
// Event
extendedInfo.append("<event>");
extendedInfo.append(parser.group(index++));
extendedInfo.append("</event>");
// Coordinates
position.setLatitude(Double.valueOf(parser.group(index++)));
position.setLongitude(Double.valueOf(parser.group(index++)));
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.HOUR, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0 ? true : false);
// Satellites
extendedInfo.append("<satellites>");
extendedInfo.append(parser.group(index++));
extendedInfo.append("</satellites>");
// GSM Signal
extendedInfo.append("<gsm>");
extendedInfo.append(parser.group(index++));
extendedInfo.append("</gsm>");
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
position.setCourse(Double.valueOf(parser.group(index++)));
// HDOP
extendedInfo.append("<hdop>");
extendedInfo.append(parser.group(index++));
extendedInfo.append("</hdop>");
// Altitude
position.setAltitude(Double.valueOf(parser.group(index++)));
// Milage
extendedInfo.append("<milage>");
extendedInfo.append(parser.group(index++));
extendedInfo.append("</milage>");
// Extended info
position.setExtendedInfo(extendedInfo.toString());
return position;
}
}
|
