1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.bluetooth.client.map.utils;
18
19import java.util.Calendar;
20import java.util.Date;
21import java.util.Locale;
22import java.util.TimeZone;
23import java.util.regex.Matcher;
24import java.util.regex.Pattern;
25
26public final class ObexTime {
27
28    private Date mDate;
29
30    public ObexTime(String time) {
31        /*
32         * match OBEX time string: YYYYMMDDTHHMMSS with optional UTF offset
33         * +/-hhmm
34         */
35        Pattern p = Pattern
36                .compile("(\\d{4})(\\d{2})(\\d{2})T(\\d{2})(\\d{2})(\\d{2})(([+-])(\\d{2})(\\d{2}))?");
37        Matcher m = p.matcher(time);
38
39        if (m.matches()) {
40
41            /*
42             * matched groups are numberes as follows: YYYY MM DD T HH MM SS +
43             * hh mm ^^^^ ^^ ^^ ^^ ^^ ^^ ^ ^^ ^^ 1 2 3 4 5 6 8 9 10 all groups
44             * are guaranteed to be numeric so conversion will always succeed
45             * (except group 8 which is either + or -)
46             */
47
48            Calendar cal = Calendar.getInstance();
49            cal.set(Integer.parseInt(m.group(1)), Integer.parseInt(m.group(2)) - 1,
50                    Integer.parseInt(m.group(3)), Integer.parseInt(m.group(4)),
51                    Integer.parseInt(m.group(5)), Integer.parseInt(m.group(6)));
52
53            /*
54             * if 7th group is matched then we have UTC offset information
55             * included
56             */
57            if (m.group(7) != null) {
58                int ohh = Integer.parseInt(m.group(9));
59                int omm = Integer.parseInt(m.group(10));
60
61                /* time zone offset is specified in miliseconds */
62                int offset = (ohh * 60 + omm) * 60 * 1000;
63
64                if (m.group(8).equals("-")) {
65                    offset = -offset;
66                }
67
68                TimeZone tz = TimeZone.getTimeZone("UTC");
69                tz.setRawOffset(offset);
70
71                cal.setTimeZone(tz);
72            }
73
74            mDate = cal.getTime();
75        }
76    }
77
78    public ObexTime(Date date) {
79        mDate = date;
80    }
81
82    public Date getTime() {
83        return mDate;
84    }
85
86    @Override
87    public String toString() {
88        if (mDate == null) {
89            return null;
90        }
91
92        Calendar cal = Calendar.getInstance();
93        cal.setTime(mDate);
94
95        /* note that months are numbered stating from 0 */
96        return String.format(Locale.US, "%04d%02d%02dT%02d%02d%02d",
97                cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1,
98                cal.get(Calendar.DATE), cal.get(Calendar.HOUR_OF_DAY),
99                cal.get(Calendar.MINUTE), cal.get(Calendar.SECOND));
100    }
101}
102