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/*******************************************************************************
* Copyright (c) 2009, 2010 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Francois Chouinard - Initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.tmf.core.component;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.linuxtools.tmf.core.event.TmfData;
/**
* <b><u>TmfProviderManager.java</u></b>
* <p>
* Singleton that keeps track of the event providers.
*/
public class TmfProviderManager {
// ------------------------------------------------------------------------
// No constructor
// ------------------------------------------------------------------------
private TmfProviderManager() {}
// ------------------------------------------------------------------------
// Keeps track of the providers for each event type
// ------------------------------------------------------------------------
private static Map<Class<? extends TmfData>, List<TmfDataProvider<? extends TmfData>>> fProviders =
new HashMap<Class<? extends TmfData>, List<TmfDataProvider<? extends TmfData>>>();
/**
* Registers [provider] as a provider of [eventType]
*
* @param eventType
* @param provider
*/
public static <T extends TmfData> void register(Class<T> eventType, TmfDataProvider<? extends TmfData> provider) {
if (fProviders.get(eventType) == null)
fProviders.put(eventType, new ArrayList<TmfDataProvider<? extends TmfData>>());
fProviders.get(eventType).add(provider);
}
/**
* Re-registers [provider] as a provider of [eventType]
*
* @param dataClass
* @param provider
*/
public static <T extends TmfData> void deregister(Class<T> dataClass, TmfDataProvider<? extends TmfData> provider) {
List<TmfDataProvider<? extends TmfData>> list = fProviders.get(dataClass);
if (list != null) {
list.remove(provider);
if (list.size() == 0)
fProviders.remove(dataClass);
}
}
/**
* Returns the list of components that provide [eventType]
*
* @param dataClass
* @return
*/
@SuppressWarnings("unchecked")
public static TmfDataProvider<? extends TmfData>[] getProviders(Class<? extends TmfData> dataClass) {
List<TmfDataProvider<? extends TmfData>> list = fProviders.get(dataClass);
if (list == null)
list = new ArrayList<TmfDataProvider<? extends TmfData>>();
TmfDataProvider<? extends TmfData>[] result = new TmfDataProvider[list.size()];
return list.toArray(result);
}
/**
* Returns the list of components of type [providerType] that provide [eventType]
*
* @param type
* @param clazz
* @return
*/
@SuppressWarnings("unchecked")
public static TmfDataProvider<? extends TmfData>[] getProviders(Class<? extends TmfData> dataClass, Class<? extends TmfDataProvider<? extends TmfData>> providerClass) {
if (providerClass == null) {
return getProviders(dataClass);
}
TmfDataProvider<? extends TmfData>[] list = getProviders(dataClass);
List<TmfDataProvider<? extends TmfData>> result = new ArrayList<TmfDataProvider<? extends TmfData>>();
if (list != null) {
for (TmfDataProvider<? extends TmfData> provider : list) {
if (provider.getClass() == providerClass) {
result.add(provider);
}
}
}
TmfDataProvider<? extends TmfData>[] array = new TmfDataProvider[result.size()];
return result.toArray(array);
}
}
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