01: /*
02: * <copyright>
03: *
04: * Copyright 1997-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.core.persist;
28:
29: /**
30: * A persistence sequence range and timestamp.
31: */
32: public class SequenceNumbers implements Comparable {
33: int first = 0;
34: int current = 0;
35: long timestamp; // The time the highest delta in this set was written.
36:
37: public SequenceNumbers() {
38: timestamp = System.currentTimeMillis();
39: }
40:
41: public SequenceNumbers(int first, int current, long timestamp) {
42: this .first = first;
43: this .current = current;
44: this .timestamp = timestamp;
45: }
46:
47: public SequenceNumbers(SequenceNumbers numbers) {
48: this (numbers.first, numbers.current, numbers.timestamp);
49: }
50:
51: /**
52: * @return The first sequence number in the range
53: */
54: public int getFirst() {
55: return first;
56: }
57:
58: /**
59: * @return The current sequence number in the range
60: */
61: public int getCurrent() {
62: return current;
63: }
64:
65: /**
66: * @return Return the time that the highest delta in this set was written.
67: */
68: public long getTimestamp() {
69: return timestamp;
70: }
71:
72: public int compareTo(Object o) {
73: SequenceNumbers that = (SequenceNumbers) o;
74: if (this .timestamp < that.timestamp)
75: return -1;
76: if (this .timestamp > that.timestamp)
77: return 1;
78: return this .current = that.current;
79: }
80:
81: public String toString() {
82: return first + ".." + current;
83: }
84: }
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