| /******************************************************************************* |
| * Copyright (c) 2009, 2014 Ericsson |
| * |
| * All rights reserved. This program and the accompanying materials are |
| * made available under the terms of the Eclipse Public License 2.0 which |
| * accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Francois Chouinard - Initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.tracecompass.internal.tmf.core.component; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.tracecompass.tmf.core.component.TmfEventProvider; |
| import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; |
| |
| /** |
| * Singleton that keeps track of the event providers. |
| * |
| * @version 1.0 |
| * @author Francois Chouinard |
| */ |
| public class TmfProviderManager { |
| |
| // ------------------------------------------------------------------------ |
| // No constructor |
| // ------------------------------------------------------------------------ |
| |
| private TmfProviderManager() { |
| } |
| |
| // ------------------------------------------------------------------------ |
| // Keeps track of the providers for each event type |
| // ------------------------------------------------------------------------ |
| |
| private static Map<Class<? extends ITmfEvent>, List<TmfEventProvider>> fProviders = |
| new HashMap<>(); |
| |
| /** |
| * Registers [provider] as a provider of [eventType] |
| * |
| * @param eventType |
| * The event type |
| * @param provider |
| * The data provider |
| */ |
| public static synchronized <T extends ITmfEvent> void register(Class<T> eventType, TmfEventProvider provider) { |
| List<TmfEventProvider> typeProviders = fProviders.computeIfAbsent(eventType, type -> new ArrayList<>()); |
| typeProviders.add(provider); |
| } |
| |
| /** |
| * Re-registers [provider] as a provider of [eventType] |
| * |
| * @param eventType |
| * The event type |
| * @param provider |
| * The data provider |
| */ |
| public static synchronized <T extends ITmfEvent> void deregister(Class<T> eventType, TmfEventProvider provider) { |
| List<TmfEventProvider> list = fProviders.get(eventType); |
| if (list != null) { |
| list.remove(provider); |
| if (list.isEmpty()) { |
| fProviders.remove(eventType); |
| } |
| } |
| } |
| |
| /** |
| * Returns the list of components that provide [eventType] |
| * |
| * @param eventType |
| * The event type |
| * @return the list of components that provide [eventType] |
| */ |
| public static TmfEventProvider[] getProviders(Class<? extends ITmfEvent> eventType) { |
| List<TmfEventProvider> list = fProviders.get(eventType); |
| if (list == null) { |
| list = new ArrayList<>(); |
| } |
| TmfEventProvider[] result = new TmfEventProvider[list.size()]; |
| return list.toArray(result); |
| } |
| |
| /** |
| * Returns the list of components of type [providerType] that provide |
| * [eventType] |
| * |
| * @param eventType |
| * The event type |
| * @param providerType |
| * The data provider |
| * @return the list of components of type [providerType] that provide |
| * [eventType] |
| */ |
| public static TmfEventProvider[] getProviders(Class<? extends ITmfEvent> eventType, Class<? extends TmfEventProvider> providerType) { |
| if (providerType == null) { |
| return getProviders(eventType); |
| } |
| TmfEventProvider[] list = getProviders(eventType); |
| List<TmfEventProvider> result = new ArrayList<>(); |
| if (list != null) { |
| for (TmfEventProvider provider : list) { |
| if (provider.getClass() == providerType) { |
| result.add(provider); |
| } |
| } |
| } |
| TmfEventProvider[] array = new TmfEventProvider[result.size()]; |
| return result.toArray(array); |
| } |
| |
| } |