/*
* 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.servicemix.nmr.core;
import java.util.Iterator;
import org.apache.servicemix.nmr.api.event.Listener;
import org.apache.servicemix.nmr.api.event.ListenerRegistry;
import org.apache.servicemix.nmr.core.util.Filter;
import org.apache.servicemix.nmr.core.util.FilterIterator;
/**
*
*/
public class ListenerRegistryImpl extends ServiceRegistryImpl<Listener> implements ListenerRegistry {
/**
* Retrieve an iterator of listeners of a certain type
*
* @param type the type of listeners
* @return an iterator over the registered listeners
*/
public <T extends Listener> Iterable<T> getListeners(final Class<T> type) {
return new Iterable<T>() {
@SuppressWarnings("unchecked")
public Iterator<T> iterator() {
return new FilterIterator(getServices().iterator(), new Filter() {
public boolean match(Object endpoint) {
return type.isInstance(endpoint);
}
});
}
};
}
}