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5179fc01 | 1 | /******************************************************************************* |
065cc19b | 2 | * Copyright (c) 2012, 2014 Ericsson |
f8177ba2 | 3 | * |
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4 | * All rights reserved. This program and the accompanying materials are |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
f8177ba2 | 8 | * |
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9 | * Contributors: |
10 | * Francois Chouinard - Initial API and implementation | |
065cc19b | 11 | * Alexandre Montplaisir - Removed concept of precision |
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12 | *******************************************************************************/ |
13 | ||
2bdf0193 | 14 | package org.eclipse.tracecompass.tmf.core.timestamp; |
3bd46eef | 15 | |
5dca27ae | 16 | import org.eclipse.jdt.annotation.NonNull; |
2bdf0193 | 17 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
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18 | |
19 | /** | |
7636a88e | 20 | * The fundamental time reference in the TMF. |
21 | * <p> | |
22 | * It defines a generic timestamp interface in its most basic form: | |
23 | * <ul> | |
24 | * <li>timestamp = [value] * 10**[scale] +/- [precision] | |
25 | * </ul> | |
26 | * Where: | |
27 | * <ul> | |
28 | * <li>[value] is an unstructured integer value | |
29 | * <li>[scale] is the magnitude of the value wrt some application-specific | |
30 | * base unit (e.g. the second) | |
31 | * <li>[precision] indicates the error on the value (useful for comparing | |
32 | * timestamps in different scales). Default: 0. | |
33 | * </ul> | |
f8177ba2 | 34 | * |
d337369a | 35 | * @author Francois Chouinard |
f8177ba2 | 36 | * |
f7703ed6 | 37 | * @see ITmfEvent |
d337369a | 38 | * @see TmfTimeRange |
5179fc01 | 39 | */ |
0316808c | 40 | public interface ITmfTimestamp extends Comparable<ITmfTimestamp> { |
5179fc01 | 41 | |
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42 | // ------------------------------------------------------------------------ |
43 | // Constants | |
44 | // ------------------------------------------------------------------------ | |
45 | ||
46 | /** | |
47 | * The millisecond scale factor (10e0) | |
f8177ba2 | 48 | */ |
304712fe | 49 | int SECOND_SCALE = 0; |
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50 | |
51 | /** | |
52 | * The millisecond scale factor (10e-3) | |
f8177ba2 | 53 | */ |
304712fe | 54 | int MILLISECOND_SCALE = -3; |
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55 | |
56 | /** | |
57 | * The microsecond scale factor (10e-6) | |
f8177ba2 | 58 | */ |
304712fe | 59 | int MICROSECOND_SCALE = -6; |
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60 | |
61 | /** | |
62 | * The nanosecond scale factor (10e-9) | |
f8177ba2 | 63 | */ |
304712fe | 64 | int NANOSECOND_SCALE = -9; |
f8177ba2 | 65 | |
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66 | // ------------------------------------------------------------------------ |
67 | // Getters | |
68 | // ------------------------------------------------------------------------ | |
69 | ||
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70 | /** |
71 | * @return the timestamp value (magnitude) | |
72 | */ | |
57a2a5ca | 73 | long getValue(); |
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74 | |
75 | /** | |
76 | * @return the timestamp scale (exponent) | |
77 | */ | |
57a2a5ca | 78 | int getScale(); |
5179fc01 | 79 | |
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80 | // ------------------------------------------------------------------------ |
81 | // Operations | |
82 | // ------------------------------------------------------------------------ | |
83 | ||
5179fc01 | 84 | /** |
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85 | * Normalize (adjust scale and offset) of the timestamp |
86 | * | |
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87 | * @param offset the offset to apply to the timestamp value (after scaling) |
88 | * @param scale the new timestamp scale | |
89 | * @return a new 'adjusted' ITmfTimestamp | |
90 | */ | |
5dca27ae | 91 | @NonNull ITmfTimestamp normalize(long offset, int scale); |
5179fc01 | 92 | |
5179fc01 | 93 | /** |
085d898f | 94 | * Returns the difference between [this] and [ts] as a timestamp |
f8177ba2 | 95 | * |
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96 | * @param ts the other timestamp |
97 | * @return the time difference (this - other) as an ITmfTimestamp | |
98 | */ | |
57a2a5ca | 99 | ITmfTimestamp getDelta(ITmfTimestamp ts); |
5179fc01 | 100 | |
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101 | /** |
102 | * Returns if this timestamp intersects the given time range. Borders are | |
103 | * inclusive (for more fine-grained behavior, you can use | |
104 | * {@link #compareTo(ITmfTimestamp)}. | |
105 | * | |
106 | * @param range | |
107 | * The time range to compare to | |
108 | * @return True if this timestamp is part of the time range, false if not | |
109 | */ | |
57a2a5ca | 110 | boolean intersects(TmfTimeRange range); |
1de55ea2 | 111 | |
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112 | // ------------------------------------------------------------------------ |
113 | // Comparable | |
114 | // ------------------------------------------------------------------------ | |
115 | ||
d7dbf09a | 116 | @Override |
b9e37ffd | 117 | int compareTo(ITmfTimestamp ts); |
4df4581d | 118 | |
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119 | /** |
120 | * Format the timestamp as per the format provided | |
121 | * | |
122 | * @param format the timestamp formatter | |
123 | * @return the formatted timestamp | |
f8177ba2 | 124 | */ |
57a2a5ca | 125 | String toString(final TmfTimestampFormat format); |
f8177ba2 | 126 | |
5179fc01 | 127 | } |