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9447c7ee | 1 | /******************************************************************************* |
ed48dc75 | 2 | * Copyright (c) 2014, 2016 Ericsson |
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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: | |
10 | * Alexandre Montplaisir - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.tracecompass.tmf.core.event.aspect; | |
14 | ||
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15 | import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; |
16 | ||
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17 | import org.eclipse.jdt.annotation.NonNull; |
18 | import org.eclipse.jdt.annotation.Nullable; | |
19 | import org.eclipse.osgi.util.NLS; | |
20 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; | |
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21 | import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException; |
22 | import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; | |
23 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
24 | ||
25 | /** | |
26 | * Aspect representing a query in a given state system, at the timestamp of the | |
27 | * event. | |
28 | * | |
29 | * This is a good example of how aspects can be "indirect" with regards to their | |
30 | * events. | |
31 | * | |
32 | * @author Alexandre Montplaisir | |
33 | */ | |
ec48d248 | 34 | public class TmfStateSystemAspect implements ITmfEventAspect<String> { |
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35 | |
36 | private final @Nullable String fName; | |
37 | private final ITmfStateSystem fSS; | |
38 | private final int fAttribute; | |
39 | ||
40 | /** | |
41 | * Constructor | |
42 | * | |
43 | * @param name | |
44 | * The name of this aspect. You can use 'null' to use the | |
45 | * default name, which is the (base) name of the attribute. | |
46 | * @param ss | |
47 | * The state system in which we want to query | |
48 | * @param attributeQuark | |
49 | * The quark of the attribute in the state system to look for | |
50 | */ | |
51 | public TmfStateSystemAspect(@Nullable String name, ITmfStateSystem ss, int attributeQuark) { | |
52 | fName = name; | |
53 | fSS = ss; | |
54 | fAttribute = attributeQuark; | |
55 | } | |
56 | ||
57 | @Override | |
58 | public String getName() { | |
59 | String name = fName; | |
60 | if (name != null) { | |
61 | return name; | |
62 | } | |
63 | ||
98e08b50 | 64 | name = fSS.getFullAttributePath(fAttribute); |
04927a83 | 65 | return name; |
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66 | } |
67 | ||
68 | @Override | |
69 | public @NonNull String getHelpText() { | |
70 | return Messages.getMessage(NLS.bind(Messages.AspectHelpText_Statesystem, | |
71 | fSS.getSSID(), fSS.getFullAttributePath(fAttribute))); | |
72 | } | |
73 | ||
74 | @Override | |
2a28075c | 75 | public @Nullable String resolve(ITmfEvent event) { |
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76 | try { |
77 | ITmfStateValue value = fSS.querySingleState(event.getTimestamp().getValue(), fAttribute).getStateValue(); | |
5db5a3a4 | 78 | return checkNotNull(value.toString()); |
ed48dc75 | 79 | } catch (StateSystemDisposedException e) { |
2a28075c | 80 | return null; |
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81 | } |
82 | } | |
9447c7ee | 83 | } |