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8c8bf09f | 1 | /******************************************************************************* |
61759503 | 2 | * Copyright (c) 2009, 2012 Ericsson |
6256d8ad | 3 | * |
8c8bf09f ASL |
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 | * |
8c8bf09f ASL |
9 | * Contributors: |
10 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
8fd82db5 | 13 | package org.eclipse.linuxtools.internal.tmf.core.component; |
8c8bf09f ASL |
14 | |
15 | import java.util.ArrayList; | |
16 | import java.util.HashMap; | |
17 | import java.util.List; | |
18 | import java.util.Map; | |
19 | ||
8fd82db5 | 20 | import org.eclipse.linuxtools.tmf.core.component.TmfDataProvider; |
72f1e62a | 21 | import org.eclipse.linuxtools.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 | |
8c8bf09f ASL |
28 | */ |
29 | public class TmfProviderManager { | |
30 | ||
ff4ed569 FC |
31 | // ------------------------------------------------------------------------ |
32 | // No constructor | |
33 | // ------------------------------------------------------------------------ | |
34 | ||
35 | private TmfProviderManager() {} | |
6256d8ad | 36 | |
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37 | // ------------------------------------------------------------------------ |
38 | // Keeps track of the providers for each event type | |
39 | // ------------------------------------------------------------------------ | |
6256d8ad AM |
40 | |
41 | private static Map<Class<? extends ITmfEvent>, List<TmfDataProvider>> fProviders = | |
42 | new HashMap<Class<? extends ITmfEvent>, List<TmfDataProvider>>(); | |
8c8bf09f ASL |
43 | |
44 | /** | |
45 | * Registers [provider] as a provider of [eventType] | |
9b749023 AM |
46 | * |
47 | * @param eventType The event type | |
48 | * @param provider The data provider | |
8c8bf09f | 49 | */ |
6256d8ad AM |
50 | public static <T extends ITmfEvent> void register(Class<T> eventType, TmfDataProvider provider) { |
51 | if (fProviders.get(eventType) == null) { | |
52 | fProviders.put(eventType, new ArrayList<TmfDataProvider>()); | |
53 | } | |
8c8bf09f ASL |
54 | fProviders.get(eventType).add(provider); |
55 | } | |
56 | ||
57 | /** | |
58 | * Re-registers [provider] as a provider of [eventType] | |
9b749023 AM |
59 | * |
60 | * @param eventType The event type | |
61 | * @param provider The data provider | |
8c8bf09f | 62 | */ |
6256d8ad AM |
63 | public static <T extends ITmfEvent> void deregister(Class<T> eventType, TmfDataProvider provider) { |
64 | List<TmfDataProvider> list = fProviders.get(eventType); | |
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65 | if (list != null) { |
66 | list.remove(provider); | |
6256d8ad AM |
67 | if (list.size() == 0) { |
68 | fProviders.remove(eventType); | |
69 | } | |
8c8bf09f ASL |
70 | } |
71 | } | |
72 | ||
73 | /** | |
74 | * Returns the list of components that provide [eventType] | |
9b749023 AM |
75 | * |
76 | * @param eventType The event type | |
0d9a6d76 | 77 | * @return the list of components that provide [eventType] |
8c8bf09f | 78 | */ |
6256d8ad AM |
79 | public static TmfDataProvider[] getProviders(Class<? extends ITmfEvent> eventType) { |
80 | List<TmfDataProvider> list = fProviders.get(eventType); | |
81 | if (list == null) { | |
82 | list = new ArrayList<TmfDataProvider>(); | |
83 | } | |
84 | TmfDataProvider[] result = new TmfDataProvider[list.size()]; | |
8c8bf09f ASL |
85 | return list.toArray(result); |
86 | } | |
87 | ||
88 | /** | |
89 | * Returns the list of components of type [providerType] that provide [eventType] | |
9b749023 AM |
90 | * |
91 | * @param eventType The event type | |
92 | * @param providerType The data provider | |
0d9a6d76 | 93 | * @return the list of components of type [providerType] that provide [eventType] |
8c8bf09f | 94 | */ |
6256d8ad | 95 | public static TmfDataProvider[] getProviders(Class<? extends ITmfEvent> eventType, Class<? extends TmfDataProvider> providerType) { |
0d9a6d76 FC |
96 | if (providerType == null) { |
97 | return getProviders(eventType); | |
fc6ccf6f | 98 | } |
6256d8ad AM |
99 | TmfDataProvider[] list = getProviders(eventType); |
100 | List<TmfDataProvider> result = new ArrayList<TmfDataProvider>(); | |
8c8bf09f | 101 | if (list != null) { |
6256d8ad | 102 | for (TmfDataProvider provider : list) { |
0d9a6d76 | 103 | if (provider.getClass() == providerType) { |
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104 | result.add(provider); |
105 | } | |
106 | } | |
107 | } | |
6256d8ad | 108 | TmfDataProvider[] array = new TmfDataProvider[result.size()]; |
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109 | return result.toArray(array); |
110 | } | |
111 | ||
112 | } |