| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2011, 2013 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 | |
| 13 | package org.eclipse.linuxtools.internal.ctf.core.trace; |
| 14 | |
| 15 | import java.io.Serializable; |
| 16 | import java.util.Comparator; |
| 17 | |
| 18 | import org.eclipse.linuxtools.ctf.core.event.EventDefinition; |
| 19 | import org.eclipse.linuxtools.ctf.core.trace.CTFStreamInputReader; |
| 20 | import org.eclipse.linuxtools.ctf.core.trace.Utils; |
| 21 | |
| 22 | /** |
| 23 | * <b><u>StreamInputReaderTimestampComparator</u></b> |
| 24 | * <p> |
| 25 | * Compares two StreamInputReader by their timestamp (smaller comes before). |
| 26 | */ |
| 27 | public class StreamInputReaderTimestampComparator implements |
| 28 | Comparator<CTFStreamInputReader>, Serializable { |
| 29 | |
| 30 | // ------------------------------------------------------------------------ |
| 31 | // Constants |
| 32 | // ------------------------------------------------------------------------ |
| 33 | |
| 34 | private static final long serialVersionUID = 1066434959451875045L; |
| 35 | |
| 36 | // ------------------------------------------------------------------------ |
| 37 | // Operations |
| 38 | // ------------------------------------------------------------------------ |
| 39 | |
| 40 | /** |
| 41 | * @throws NullPointerException |
| 42 | * If any {@link CTFStreamInputReader} parameter is null, of if any |
| 43 | * of them does not contain a current event. |
| 44 | */ |
| 45 | @Override |
| 46 | public int compare(CTFStreamInputReader a, CTFStreamInputReader b) { |
| 47 | EventDefinition event_a = a.getCurrentEvent(); |
| 48 | EventDefinition event_b = b.getCurrentEvent(); |
| 49 | |
| 50 | long ta = event_a.getTimestamp(); |
| 51 | long tb = event_b.getTimestamp(); |
| 52 | return Utils.unsignedCompare(ta, tb); |
| 53 | } |
| 54 | |
| 55 | } |