/*
* Copyright 2012 The Solmix Project
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.gnu.org/licenses/
* or see the FSF site: http://www.fsf.org.
*/
package org.solmix.eventservice.filter;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import org.osgi.framework.ServiceReference;
import org.solmix.eventservice.BlackList;
/**
* This class implements a <tt>BlackList</tt> that removes references to unregistered services automatically.
*
* @author solmix.f@gmail.com
* @version 110035 2011-10-1
*/
public class BlackListImpl implements BlackList
{
private final Set<ServiceReference<?>> blankList = Collections.synchronizedSet(new HashSet<ServiceReference<?>>() {
public boolean contains(final Object object) {
for (Iterator<ServiceReference<?>> iter = super.iterator(); iter.hasNext();) {
final ServiceReference<?> ref = iter.next();
if (null == ref.getBundle()) {
iter.remove();
}
}
return super.contains(object);
}
});
/**
* {@inheritDoc}
*
* @see org.solmix.eventservice.BlankList#add(org.osgi.framework.ServiceReference)
*/
@Override
public void add(ServiceReference<?> ref) {
blankList.add(ref);
}
/**
* {@inheritDoc}
*
* @see org.solmix.eventservice.BlankList#contains(org.osgi.framework.ServiceReference)
*/
@Override
public boolean contains(ServiceReference<?> ref) {
return blankList.contains(ref);
}
}