/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.felix.http.whiteboard.internal.tracker;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.ServiceReference;
import org.osgi.util.tracker.ServiceTracker;
public abstract class AbstractTracker<T>
extends ServiceTracker
{
public AbstractTracker(BundleContext context, Filter filter)
{
super(context, filter, null);
}
public AbstractTracker(BundleContext context, Class clazz)
{
super(context, clazz.getName(), null);
}
@Override
@SuppressWarnings("unchecked")
public final Object addingService(ServiceReference ref)
{
T service = (T)super.addingService(ref);
added(service, ref);
return service;
}
@Override
@SuppressWarnings("unchecked")
public final void modifiedService(ServiceReference ref, Object service)
{
modified( (T)service, ref);
}
@Override
@SuppressWarnings("unchecked")
public final void removedService(ServiceReference ref, Object service)
{
super.removedService(ref, service);
removed((T) service, ref);
}
protected abstract void modified(T service, ServiceReference ref);
protected abstract void added(T service, ServiceReference ref);
protected abstract void removed(T service, ServiceReference ref);
}