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1 | /******************************************************************************* |
2 | * Copyright (c) 2011-2012 Ericsson, Ecole Polytechnique de Montreal and others | |
3 | * | |
4 | * All rights reserved. This program and the accompanying materials are made | |
5 | * 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 | |
8 | * | |
9 | * Contributors: Matthew Khouzam - Initial API and implementation | |
10 | * Contributors: Simon Marchi - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
ce2388e0 | 13 | package org.eclipse.linuxtools.internal.ctf.core.trace; |
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14 | |
15 | import java.io.Serializable; | |
16 | import java.util.Comparator; | |
17 | ||
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18 | import org.eclipse.linuxtools.ctf.core.trace.StreamInputReader; |
19 | ||
20 | ||
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21 | /** |
22 | * <b><u>StreamInputReaderTimestampComparator</u></b> | |
23 | * <p> | |
24 | * Compares two StreamInputReader by their timestamp (smaller comes before). | |
25 | */ | |
26 | public class StreamInputReaderTimestampComparator implements | |
27 | Comparator<StreamInputReader>, Serializable { | |
28 | ||
29 | // ------------------------------------------------------------------------ | |
30 | // Constants | |
31 | // ------------------------------------------------------------------------ | |
32 | ||
33 | private static final long serialVersionUID = 1066434959451875045L; | |
34 | ||
35 | // ------------------------------------------------------------------------ | |
36 | // Operations | |
37 | // ------------------------------------------------------------------------ | |
38 | ||
39 | @Override | |
40 | public int compare(StreamInputReader a, StreamInputReader b) { | |
41 | // TODO: use unsigned comparison to avoid sign errors if needed | |
42 | if (a.getCurrentEvent() == null) { | |
43 | return 0; | |
44 | } | |
45 | if (b.getCurrentEvent() == null) { | |
46 | return 0; | |
47 | } | |
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48 | long ta = a.getCurrentEvent().getTimestamp(); |
49 | long tb = b.getCurrentEvent().getTimestamp(); | |
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50 | |
51 | if (ta < tb) { | |
52 | return -1; | |
53 | } else if (ta > tb) { | |
54 | return 1; | |
55 | } else { | |
56 | return 0; | |
57 | } | |
58 | } | |
59 | ||
60 | } |