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8c8bf09f | 1 | /******************************************************************************* |
ed902a2b | 2 | * Copyright (c) 2009, 2014 Ericsson |
6256d8ad | 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 | |
6256d8ad | 8 | * |
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9 | * Contributors: |
10 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
2bdf0193 | 13 | package org.eclipse.tracecompass.internal.tmf.core.component; |
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14 | |
15 | import java.util.ArrayList; | |
16 | import java.util.HashMap; | |
17 | import java.util.List; | |
18 | import java.util.Map; | |
19 | ||
2bdf0193 AM |
20 | import org.eclipse.tracecompass.tmf.core.component.TmfEventProvider; |
21 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
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22 | |
23 | /** | |
8c8bf09f | 24 | * Singleton that keeps track of the event providers. |
6256d8ad | 25 | * |
8fd82db5 FC |
26 | * @version 1.0 |
27 | * @author Francois Chouinard | |
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28 | */ |
29 | public class TmfProviderManager { | |
30 | ||
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31 | // ------------------------------------------------------------------------ |
32 | // No constructor | |
33 | // ------------------------------------------------------------------------ | |
ff4ed569 | 34 | |
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35 | private TmfProviderManager() { |
36 | } | |
6256d8ad | 37 | |
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38 | // ------------------------------------------------------------------------ |
39 | // Keeps track of the providers for each event type | |
40 | // ------------------------------------------------------------------------ | |
6256d8ad | 41 | |
fd3f1eff | 42 | private static Map<Class<? extends ITmfEvent>, List<TmfEventProvider>> fProviders = |
a4524c1b | 43 | new HashMap<>(); |
8c8bf09f | 44 | |
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45 | /** |
46 | * Registers [provider] as a provider of [eventType] | |
47 | * | |
48 | * @param eventType | |
49 | * The event type | |
50 | * @param provider | |
51 | * The data provider | |
52 | */ | |
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53 | public static synchronized <T extends ITmfEvent> void register(Class<T> eventType, TmfEventProvider provider) { |
54 | List<TmfEventProvider> typeProviders = fProviders.get(eventType); | |
55 | if (typeProviders == null) { | |
56 | typeProviders = new ArrayList<>(); | |
57 | fProviders.put(eventType, typeProviders); | |
6256d8ad | 58 | } |
202956f1 | 59 | typeProviders.add(provider); |
fd3f1eff | 60 | } |
8c8bf09f | 61 | |
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62 | /** |
63 | * Re-registers [provider] as a provider of [eventType] | |
64 | * | |
65 | * @param eventType | |
66 | * The event type | |
67 | * @param provider | |
68 | * The data provider | |
69 | */ | |
202956f1 | 70 | public static synchronized <T extends ITmfEvent> void deregister(Class<T> eventType, TmfEventProvider provider) { |
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71 | List<TmfEventProvider> list = fProviders.get(eventType); |
72 | if (list != null) { | |
73 | list.remove(provider); | |
74 | if (list.size() == 0) { | |
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75 | fProviders.remove(eventType); |
76 | } | |
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77 | } |
78 | } | |
8c8bf09f | 79 | |
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80 | /** |
81 | * Returns the list of components that provide [eventType] | |
82 | * | |
83 | * @param eventType | |
84 | * The event type | |
85 | * @return the list of components that provide [eventType] | |
86 | */ | |
87 | public static TmfEventProvider[] getProviders(Class<? extends ITmfEvent> eventType) { | |
88 | List<TmfEventProvider> list = fProviders.get(eventType); | |
89 | if (list == null) { | |
a4524c1b | 90 | list = new ArrayList<>(); |
6256d8ad | 91 | } |
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92 | TmfEventProvider[] result = new TmfEventProvider[list.size()]; |
93 | return list.toArray(result); | |
94 | } | |
8c8bf09f | 95 | |
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96 | /** |
97 | * Returns the list of components of type [providerType] that provide | |
98 | * [eventType] | |
99 | * | |
100 | * @param eventType | |
101 | * The event type | |
102 | * @param providerType | |
103 | * The data provider | |
104 | * @return the list of components of type [providerType] that provide | |
105 | * [eventType] | |
106 | */ | |
107 | public static TmfEventProvider[] getProviders(Class<? extends ITmfEvent> eventType, Class<? extends TmfEventProvider> providerType) { | |
108 | if (providerType == null) { | |
109 | return getProviders(eventType); | |
110 | } | |
111 | TmfEventProvider[] list = getProviders(eventType); | |
a4524c1b | 112 | List<TmfEventProvider> result = new ArrayList<>(); |
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113 | if (list != null) { |
114 | for (TmfEventProvider provider : list) { | |
115 | if (provider.getClass() == providerType) { | |
116 | result.add(provider); | |
117 | } | |
118 | } | |
119 | } | |
120 | TmfEventProvider[] array = new TmfEventProvider[result.size()]; | |
121 | return result.toArray(array); | |
122 | } | |
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123 | |
124 | } |