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1 | /******************************************************************************* |
2 | * Copyright (c) 2009, 2010 Ericsson | |
3 | * | |
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 | |
8 | * | |
9 | * Contributors: | |
10 | * Francois Chouinard - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.linuxtools.tmf.component; | |
14 | ||
15 | import java.util.ArrayList; | |
16 | import java.util.HashMap; | |
17 | import java.util.List; | |
18 | import java.util.Map; | |
19 | ||
20 | import org.eclipse.linuxtools.tmf.event.TmfData; | |
21 | ||
22 | /** | |
23 | * <b><u>TmfProviderManager.java</u></b> | |
24 | * <p> | |
25 | * Singleton that keeps track of the event providers. | |
26 | */ | |
27 | public class TmfProviderManager { | |
28 | ||
ff4ed569 FC |
29 | // ------------------------------------------------------------------------ |
30 | // No constructor | |
31 | // ------------------------------------------------------------------------ | |
32 | ||
33 | private TmfProviderManager() {} | |
34 | ||
8c8bf09f ASL |
35 | // ------------------------------------------------------------------------ |
36 | // Keeps track of the providers for each event type | |
37 | // ------------------------------------------------------------------------ | |
38 | ||
fc6ccf6f FC |
39 | private static Map<Class<? extends TmfData>, List<TmfDataProvider<? extends TmfData>>> fProviders = |
40 | new HashMap<Class<? extends TmfData>, List<TmfDataProvider<? extends TmfData>>>(); | |
8c8bf09f ASL |
41 | |
42 | /** | |
43 | * Registers [provider] as a provider of [eventType] | |
44 | * | |
45 | * @param eventType | |
46 | * @param provider | |
47 | */ | |
fc6ccf6f | 48 | public static <T extends TmfData> void register(Class<T> eventType, TmfDataProvider<? extends TmfData> provider) { |
8c8bf09f | 49 | if (fProviders.get(eventType) == null) |
fc6ccf6f | 50 | fProviders.put(eventType, new ArrayList<TmfDataProvider<? extends TmfData>>()); |
8c8bf09f ASL |
51 | fProviders.get(eventType).add(provider); |
52 | } | |
53 | ||
54 | /** | |
55 | * Re-registers [provider] as a provider of [eventType] | |
56 | * | |
fc6ccf6f | 57 | * @param dataClass |
8c8bf09f ASL |
58 | * @param provider |
59 | */ | |
fc6ccf6f FC |
60 | public static <T extends TmfData> void deregister(Class<T> dataClass, TmfDataProvider<? extends TmfData> provider) { |
61 | List<TmfDataProvider<? extends TmfData>> list = fProviders.get(dataClass); | |
8c8bf09f ASL |
62 | if (list != null) { |
63 | list.remove(provider); | |
64 | if (list.size() == 0) | |
fc6ccf6f | 65 | fProviders.remove(dataClass); |
8c8bf09f ASL |
66 | } |
67 | } | |
68 | ||
69 | /** | |
70 | * Returns the list of components that provide [eventType] | |
71 | * | |
fc6ccf6f | 72 | * @param dataClass |
8c8bf09f ASL |
73 | * @return |
74 | */ | |
75 | @SuppressWarnings("unchecked") | |
fc6ccf6f FC |
76 | public static TmfDataProvider<? extends TmfData>[] getProviders(Class<? extends TmfData> dataClass) { |
77 | List<TmfDataProvider<? extends TmfData>> list = fProviders.get(dataClass); | |
8c8bf09f | 78 | if (list == null) |
fc6ccf6f FC |
79 | list = new ArrayList<TmfDataProvider<? extends TmfData>>(); |
80 | TmfDataProvider<? extends TmfData>[] result = new TmfDataProvider[list.size()]; | |
8c8bf09f ASL |
81 | return list.toArray(result); |
82 | } | |
83 | ||
84 | /** | |
85 | * Returns the list of components of type [providerType] that provide [eventType] | |
86 | * | |
87 | * @param type | |
88 | * @param clazz | |
89 | * @return | |
90 | */ | |
91 | @SuppressWarnings("unchecked") | |
fc6ccf6f FC |
92 | public static TmfDataProvider<? extends TmfData>[] getProviders(Class<? extends TmfData> dataClass, Class<? extends TmfDataProvider<? extends TmfData>> providerClass) { |
93 | if (providerClass == null) { | |
94 | return getProviders(dataClass); | |
95 | } | |
96 | TmfDataProvider<? extends TmfData>[] list = getProviders(dataClass); | |
97 | List<TmfDataProvider<? extends TmfData>> result = new ArrayList<TmfDataProvider<? extends TmfData>>(); | |
8c8bf09f | 98 | if (list != null) { |
fc6ccf6f FC |
99 | for (TmfDataProvider<? extends TmfData> provider : list) { |
100 | if (provider.getClass() == providerClass) { | |
8c8bf09f ASL |
101 | result.add(provider); |
102 | } | |
103 | } | |
104 | } | |
fc6ccf6f | 105 | TmfDataProvider<? extends TmfData>[] array = new TmfDataProvider[result.size()]; |
8c8bf09f ASL |
106 | return result.toArray(array); |
107 | } | |
108 | ||
109 | } |