aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/protocol/RitiProtocolDecoder.java
blob: bb7c0b583723444cd0e0345ec6b93b579d62dd20 (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
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
/*
 * Copyright 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.net.SocketAddress;
import java.nio.charset.Charset;
import java.util.Calendar;
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.traccar.BaseProtocolDecoder;
import org.traccar.helper.ChannelBufferTools;
import org.traccar.model.Event;
import org.traccar.model.Position;

public class RitiProtocolDecoder extends BaseProtocolDecoder {

    public RitiProtocolDecoder(RitiProtocol protocol) {
        super(protocol);
    }

    private static final Pattern PATTERN = Pattern.compile(
            "\\$GPRMC," +
            "(\\d{2})(\\d{2})(\\d{2})\\.?\\d*," + // Time (HHMMSS.SSS)
            "([AV])," +                    // Validity
            "(\\d{2})(\\d{2}\\.\\d+)," +   // Latitude (DDMM.MMMM)
            "([NS])," +
            "(\\d{3})(\\d{2}\\.\\d+)," +   // Longitude (DDDMM.MMMM)
            "([EW])," +
            "(\\d+\\.?\\d*)?," +           // Speed
            "(\\d+\\.?\\d*)?," +           // Course
            "(\\d{2})(\\d{2})(\\d{2})" +   // Date (DDMMYY)
            ".+");

    @Override
    protected Object decode(
            Channel channel, SocketAddress remoteAddress, Object msg)
            throws Exception {

        ChannelBuffer buf = (ChannelBuffer) msg;

        // Create new position
        Position position = new Position();
        position.setProtocol(getProtocolName());

        buf.skipBytes(2); // header

        // Get device id
        if (!identify(String.valueOf(buf.readUnsignedShort()), channel)) {
            return null;
        }
        position.setDeviceId(getDeviceId());

        position.set("mode", buf.readUnsignedByte());
        position.set("command", buf.readUnsignedByte());
        position.set(Event.KEY_POWER, buf.readUnsignedShort());

        buf.skipBytes(5);
        buf.readUnsignedShort();
        buf.readUnsignedShort();

        position.set("distance", buf.readUnsignedInt());
        position.set(Event.KEY_ODOMETER, buf.readUnsignedInt());

        // Parse GPRMC
        Integer end = ChannelBufferTools.find(buf, buf.readerIndex(), buf.readerIndex() + 80, "*");
        String gprmc = buf.toString(
                buf.readerIndex(), end - buf.readerIndex(), Charset.defaultCharset());
        Matcher parser = PATTERN.matcher(gprmc);
        if (!parser.matches()) {
            return null;
        }

        Integer index = 1;

        // Time
        Calendar time = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
        time.clear();
        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++)));

        // Validity
        position.setValid(parser.group(index++).compareTo("A") == 0);

        // Latitude
        Double latitude = Double.parseDouble(parser.group(index++));
        latitude += Double.parseDouble(parser.group(index++)) / 60;
        if (parser.group(index++).compareTo("S") == 0) latitude = -latitude;
        position.setLatitude(latitude);

        // Longitude
        Double longitude = Double.parseDouble(parser.group(index++));
        longitude += Double.parseDouble(parser.group(index++)) / 60;
        if (parser.group(index++).compareTo("W") == 0) longitude = -longitude;
        position.setLongitude(longitude);

        // Speed
        String speed = parser.group(index++);
        if (speed != null) {
            position.setSpeed(Double.parseDouble(speed));
        }

        // Course
        String course = parser.group(index++);
        if (course != null) {
            position.setCourse(Double.parseDouble(course));
        }

        // Date
        time.set(Calendar.DAY_OF_MONTH, Integer.parseInt(parser.group(index++)));
        time.set(Calendar.MONTH, Integer.parseInt(parser.group(index++)) - 1);
        time.set(Calendar.YEAR, 2000 + Integer.parseInt(parser.group(index++)));
        position.setTime(time.getTime());
        return position;
    }

}