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1 | /******************************************************************************* |
2 | * Copyright (c) 2015 EfficiOS Inc., Alexandre Montplaisir | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials | |
5 | * are made available under the terms of the Eclipse Public License v1.0 | |
6 | * which accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | *******************************************************************************/ | |
9 | ||
10 | package org.eclipse.tracecompass.segmentstore.core; | |
11 | ||
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12 | import org.eclipse.jdt.annotation.NonNull; |
13 | import org.eclipse.tracecompass.datastore.core.interval.IHTIntervalReader; | |
14 | import org.eclipse.tracecompass.datastore.core.serialization.ISafeByteBufferWriter; | |
15 | ||
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16 | /** |
17 | * Basic implementation of {@link ISegment}. | |
18 | * | |
19 | * @author Alexandre Montplaisir | |
20 | */ | |
21 | public class BasicSegment implements ISegment { | |
22 | ||
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23 | /** |
24 | * The factory to read an object from a buffer | |
25 | * @since 2.0 | |
26 | */ | |
27 | public static final IHTIntervalReader<BasicSegment> BASIC_SEGMENT_READ_FACTORY = buffer -> { | |
28 | return new BasicSegment(buffer.getLong(), buffer.getLong()); | |
29 | }; | |
30 | ||
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31 | private static final long serialVersionUID = -3257452887960883177L; |
32 | ||
33 | private final long fStart; | |
34 | private final long fEnd; | |
35 | ||
36 | /** | |
37 | * Create a new segment. | |
38 | * | |
39 | * The end position should be equal to or greater than the start position. | |
40 | * | |
41 | * @param start | |
42 | * Start position of the segment | |
43 | * @param end | |
44 | * End position of the segment | |
45 | */ | |
46 | public BasicSegment(long start, long end) { | |
47 | if (end < start) { | |
48 | throw new IllegalArgumentException(); | |
49 | } | |
50 | fStart = start; | |
51 | fEnd = end; | |
52 | } | |
53 | ||
54 | @Override | |
55 | public long getStart() { | |
56 | return fStart; | |
57 | } | |
58 | ||
59 | @Override | |
60 | public long getEnd() { | |
61 | return fEnd; | |
62 | } | |
63 | ||
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64 | /** |
65 | * @since 2.0 | |
66 | */ | |
67 | @Override | |
68 | public int getSizeOnDisk() { | |
69 | // Save the start and end time | |
70 | return Long.BYTES * 2; | |
71 | } | |
72 | ||
73 | /** | |
74 | * @since 2.0 | |
75 | */ | |
76 | @Override | |
77 | public void writeSegment(@NonNull ISafeByteBufferWriter buffer) { | |
78 | buffer.putLong(getStart()); | |
79 | buffer.putLong(getEnd()); | |
80 | } | |
81 | ||
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82 | @Override |
83 | public String toString() { | |
84 | return new String('[' + String.valueOf(fStart) + ", " + String.valueOf(fEnd) + ']'); //$NON-NLS-1$ | |
85 | } | |
3866be8e | 86 | |
5a90de55 | 87 | } |