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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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/*
 * 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 com.feilong.lib.net.util;

import java.io.Serializable;
import java.util.EventListener;
import java.util.Iterator;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 */
public class ListenerList implements Serializable,Iterable{

    private static final long                         serialVersionUID = -1934227607974228213L;

    private final CopyOnWriteArrayList __listeners;

    public ListenerList(){
        __listeners = new CopyOnWriteArrayList<>();
    }

    public void addListener(EventListener listener){
        __listeners.add(listener);
    }

    public void removeListener(EventListener listener){
        __listeners.remove(listener);
    }

    public int getListenerCount(){
        return __listeners.size();
    }

    /**
     * Return an {@link Iterator} for the {@link EventListener} instances.
     *
     * @return an {@link Iterator} for the {@link EventListener} instances
     * @since 2.0
     *        TODO Check that this is a good defensive strategy
     */
    @Override
    public Iterator iterator(){
        return __listeners.iterator();
    }

}