/*
* 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.karaf.service.guard.impl;
import org.osgi.framework.*;
import org.osgi.framework.hooks.service.EventListenerHook;
import org.osgi.framework.hooks.service.ListenerHook;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
public class GuardingEventHook implements EventListenerHook {
private final BundleContext bundleContext;
private final GuardProxyCatalog guardProxyCatalog;
private final Filter servicesFilter;
GuardingEventHook(BundleContext bundleContext, GuardProxyCatalog guardProxyCatalog, Filter securedServicesFilter) throws InvalidSyntaxException {
this.bundleContext = bundleContext;
this.guardProxyCatalog = guardProxyCatalog;
this.servicesFilter = securedServicesFilter;
}
@Override
public void event(ServiceEvent event, Map<BundleContext, Collection<ListenerHook.ListenerInfo>> listeners) {
if (servicesFilter == null) {
return;
}
ServiceReference<?> sr = event.getServiceReference();
if (!servicesFilter.match(sr)) {
return;
}
boolean proxificationDone = false;
BundleContext system = bundleContext.getBundle(0).getBundleContext();
for (Iterator<BundleContext> i = listeners.keySet().iterator(); i.hasNext(); ) {
BundleContext bc = i.next();
if (bc == bundleContext || bc == system) {
// don't hide anything from this bundle or the system bundle
continue;
}
if (proxificationDone || (proxificationDone = guardProxyCatalog.handleProxificationForHook(sr))) {
i.remove();
}
}
}
}