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.wp;
28:
29: /**
30: * A utility class to format longs as:<pre>
31: * TIMESTAMP{[+-]RELATIVE_TO_NOW}
32: * </pre>.
33: * <p>
34: * For example, if t=123 and now=300, then <tt>toString(t,now)</tt>
35: * will return:<pre>
36: * 123{-177}
37: * </pre>
38: * but if t=0 the method will return:<pre>
39: * 0
40: * </pre>
41: */
42: public final class Timestamp {
43: private Timestamp() {
44: }
45:
46: public static String toString(long t) {
47: if (t == 0) {
48: return "0";
49: } else {
50: return toString(t, System.currentTimeMillis());
51: }
52: }
53:
54: public static String toString(long t, long now) {
55: if (t == 0) {
56: return "0";
57: } else {
58: long diff = t - now;
59: return t + "{"
60: + (diff >= 0 ? "+" + diff + "}" : diff + "}");
61: }
62: }
63: }
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