Autopsy  3.1
Graphical digital forensics platform for The Sleuth Kit and other tools.
IntervalUtils.java
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1 /*
2  * Autopsy Forensic Browser
3  *
4  * Copyright 2013 Basis Technology Corp.
5  * Contact: carrier <at> sleuthkit <dot> org
6  *
7  * Licensed under the Apache License, Version 2.0 (the "License");
8  * you may not use this file except in compliance with the License.
9  * You may obtain a copy of the License at
10  *
11  * http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing, software
14  * distributed under the License is distributed on an "AS IS" BASIS,
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16  * See the License for the specific language governing permissions and
17  * limitations under the License.
18  */
19 package org.sleuthkit.autopsy.timeline.utils;
20 
21 import java.util.Collection;
22 import org.joda.time.DateTime;
23 import org.joda.time.DateTimeZone;
24 import org.joda.time.Interval;
25 import org.joda.time.ReadablePeriod;
27 
31 public class IntervalUtils {
32 
33  static public Interval getSpanningInterval(Collection<DateTime> times) {
34  Interval trange = null;
35  for (DateTime t : times) {
36  if (trange == null) {
37  trange = new Interval(t.getMillis(), t.getMillis() + 1000, DateTimeZone.UTC);
38  } else {
39  trange = extendInterval(trange, t.getMillis());
40  }
41  }
42  return trange;
43  }
44 
45  static public Interval span(Interval range, final Interval range2) {
46  return new Interval(Math.min(range.getStartMillis(), range2.getStartMillis()), Math.max(range.getEndMillis(), range2.getEndMillis()), DateTimeZone.UTC);
47  }
48 
49  static public Interval extendInterval(Interval range, final Long eventTime) {
50  return new Interval(Math.min(range.getStartMillis(), eventTime), Math.max(range.getEndMillis(), eventTime + 1), DateTimeZone.UTC);
51  }
52 
53  public static DateTime middleOf(Interval interval) {
54  return new DateTime((interval.getStartMillis() + interval.getEndMillis()) / 2);
55  }
56 
57  public static Interval getAdjustedInterval(Interval oldInterval, TimeUnits requestedUnit) {
58  return getIntervalAround(middleOf(oldInterval), requestedUnit.getPeriod());
59  }
60 
61  static public Interval getIntervalAround(DateTime aroundInstant, ReadablePeriod period) {
62  DateTime start = aroundInstant.minus(period);
63  DateTime end = aroundInstant.plus(period);
64  Interval range = new Interval(start, end);
65  DateTime middleOf = IntervalUtils.middleOf(range);
66  long halfRange = range.toDurationMillis() / 4;
67  final Interval newInterval = new Interval(middleOf.minus(halfRange), middleOf.plus(halfRange));
68  return newInterval;
69  }
70 }
static Interval span(Interval range, final Interval range2)
static Interval getAdjustedInterval(Interval oldInterval, TimeUnits requestedUnit)
static Interval getIntervalAround(DateTime aroundInstant, ReadablePeriod period)
static Interval getSpanningInterval(Collection< DateTime > times)
static Interval extendInterval(Interval range, final Long eventTime)
static DateTime middleOf(Interval interval)

Copyright © 2012-2015 Basis Technology. Generated on: Mon Oct 19 2015
This work is licensed under a Creative Commons Attribution-Share Alike 3.0 United States License.