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
152
153
154
155
156
|
/*
* Copyright 2012 - 2014 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.nio.charset.Charset;
import java.util.Calendar;
import java.util.Properties;
import java.util.TimeZone;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.traccar.BaseProtocolDecoder;
import org.traccar.database.DataManager;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.helper.Log;
import org.traccar.model.ExtendedInfoFormatter;
import org.traccar.model.Position;
public class EnforaProtocolDecoder extends BaseProtocolDecoder {
public EnforaProtocolDecoder(String protocol) {
super(protocol);
}
private static final Pattern pattern = Pattern.compile(
"GPRMC," +
"(\\d{2})(\\d{2})(\\d{2}).(\\d+)," + // Time (HHMMSS.SS)
"([AV])," + // Validity
"(\\d{2})(\\d{2}.\\d+)," + // Latitude (DDMM.MMMMMM)
"([NS])," +
"(\\d{3})(\\d{2}.\\d+)," + // Longitude (DDDMM.MMMMMM)
"([EW])," +
"(\\d+.\\d+)?," + // Speed
"(\\d+.\\d+)?," + // Course
"(\\d{2})(\\d{2})(\\d{2})," + // Date (DDMMYY)
".*[\r\n\u0000]*");
public static final int IMEI_LENGTH = 15;
@Override
protected Object decode(
ChannelHandlerContext ctx, Channel channel, Object msg)
throws Exception {
ChannelBuffer buf = (ChannelBuffer) msg;
// Find IMEI (Modem ID)
String imei = null;
for (int first = -1, i = 0; i < buf.readableBytes(); i++) {
if (!Character.isDigit((char) buf.getByte(i))) {
first = i + 1;
}
// Found digit string
if (i - first == IMEI_LENGTH - 1) {
imei = buf.toString(first, IMEI_LENGTH, Charset.defaultCharset());
break;
}
}
// Write log
if (imei == null) {
Log.warning("Enfora decoder failed to find IMEI");
return null;
}
// Find GPSMC string
Integer start = ChannelBufferTools.find(buf, 0, buf.readableBytes(), "GPRMC");
if (start == null) {
// Message does not contain GPS data
return null;
}
String sentence = buf.toString(start, buf.readableBytes() - start, Charset.defaultCharset());
// Parse message
Matcher parser = pattern.matcher(sentence);
if (!parser.matches()) {
return null;
}
// Create new position
Position position = new Position();
ExtendedInfoFormatter extendedInfo = new ExtendedInfoFormatter(getProtocol());
Integer index = 1;
// Get device by IMEI
if (!identify(imei)) {
return null;
}
position.setDeviceId(getDeviceId());
// Time
Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
time.clear();
time.set(Calendar.HOUR_OF_DAY, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MINUTE, Integer.valueOf(parser.group(index++)));
time.set(Calendar.SECOND, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MILLISECOND, Integer.valueOf(parser.group(index++)) * 10);
// Validity
position.setValid(parser.group(index++).compareTo("A") == 0);
// Latitude
Double latitude = Double.valueOf(parser.group(index++));
latitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
position.setLatitude(latitude);
// Longitude
Double longitude = Double.valueOf(parser.group(index++));
longitude += Double.valueOf(parser.group(index++)) / 60;
if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
position.setLongitude(longitude);
// Altitude
position.setAltitude(0.0);
// Speed
position.setSpeed(Double.valueOf(parser.group(index++)));
// Course
String course = parser.group(index++);
if (course != null) {
position.setCourse(Double.valueOf(course));
} else {
position.setCourse(0.0);
}
// Date
time.set(Calendar.DAY_OF_MONTH, Integer.valueOf(parser.group(index++)));
time.set(Calendar.MONTH, Integer.valueOf(parser.group(index++)) - 1);
time.set(Calendar.YEAR, 2000 + Integer.valueOf(parser.group(index++)));
position.setTime(time.getTime());
position.setExtendedInfo(extendedInfo.toString());
return position;
}
}
|
