1package eu.siacs.conversations.xmpp.mam;
 2
 3public class MamReference {
 4
 5    private final long timestamp;
 6    private final String reference;
 7
 8    public MamReference(long timestamp) {
 9        this.timestamp = timestamp;
10        this.reference = null;
11    }
12
13    public MamReference(long timestamp, String reference) {
14        this.timestamp = timestamp;
15        this.reference = reference;
16    }
17
18    public long getTimestamp() {
19        return timestamp;
20    }
21
22    public String getReference() {
23        return reference;
24    }
25
26    public boolean greaterThan(MamReference b) {
27        return timestamp > b.getTimestamp();
28    }
29
30    public boolean greaterThan(long b) {
31        return timestamp > b;
32    }
33
34    public static MamReference max(MamReference a, MamReference b) {
35        if (a != null && b != null) {
36            return a.timestamp > b.timestamp ? a : b;
37        } else if (a != null) {
38            return a;
39        } else {
40            return b;
41        }
42    }
43
44    public static MamReference max(MamReference a, long b) {
45        return max(a,new MamReference(b));
46    }
47
48    public static MamReference fromAttribute(String attr) {
49        if (attr == null) {
50            return new MamReference(0);
51        } else {
52            String[] attrs = attr.split(":");
53            try {
54                long timestamp = Long.parseLong(attrs[0]);
55                if (attrs.length >= 2) {
56                    return new MamReference(timestamp,attrs[1]);
57                } else {
58                    return new MamReference(timestamp);
59                }
60            } catch (Exception e) {
61                return new MamReference(0);
62            }
63        }
64    }
65
66    public MamReference timeOnly() {
67        return reference == null ? this : new MamReference(timestamp);
68    }
69}