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This code is derived from jgit (http://eclipse.org/jgit).
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Copyright owners are documented in jgit's IP log.
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This program and the accompanying materials are made available
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under the terms of the Eclipse Distribution License v1.0 which
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accompanies this distribution, is reproduced below, and is
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available at http://www.eclipse.org/org/documents/edl-v10.php
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Redistribution and use in source and binary forms, with or
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without modification, are permitted provided that the following
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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- Neither the name of the Eclipse Foundation, Inc. nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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using System.Collections.Generic;
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/// Manages a thread-safe list of
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/// <see cref="RepositoryListener">RepositoryListener</see>
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public class ListenerList
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private readonly ConcurrentMap<Type, CopyOnWriteArrayList<ListenerHandle>> lists =
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new ConcurrentHashMap<Type, CopyOnWriteArrayList<ListenerHandle>>();
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/// <summary>Register an IndexChangedListener.</summary>
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/// <remarks>Register an IndexChangedListener.</remarks>
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/// <param name="listener">the listener implementation.</param>
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/// <returns>handle to later remove the listener.</returns>
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public virtual ListenerHandle AddIndexChangedListener(IndexChangedListener listener
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return AddListener<IndexChangedListener>(listener);
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/// <summary>Register a RefsChangedListener.</summary>
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/// <remarks>Register a RefsChangedListener.</remarks>
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/// <param name="listener">the listener implementation.</param>
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/// <returns>handle to later remove the listener.</returns>
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public virtual ListenerHandle AddRefsChangedListener(RefsChangedListener listener
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return AddListener<RefsChangedListener>(listener);
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/// <summary>Register a ConfigChangedListener.</summary>
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/// <remarks>Register a ConfigChangedListener.</remarks>
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/// <param name="listener">the listener implementation.</param>
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/// <returns>handle to later remove the listener.</returns>
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public virtual ListenerHandle AddConfigChangedListener(ConfigChangedListener listener
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return AddListener<ConfigChangedListener>(listener);
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/// <summary>Add a listener to the list.</summary>
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/// <remarks>Add a listener to the list.</remarks>
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/// <param name="type">type of listener being registered.</param>
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/// <param name="listener">the listener instance.</param>
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/// <returns>a handle to later remove the registration, if desired.</returns>
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public virtual ListenerHandle AddListener<T>(T listener) where T:RepositoryListener
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System.Type type = typeof(T);
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ListenerHandle handle = new ListenerHandle(this, type, listener);
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/// <summary>Dispatch an event to all interested listeners.</summary>
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/// Dispatch an event to all interested listeners.
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/// Listeners are selected by the type of listener the event delivers to.
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/// <param name="event">the event to deliver.</param>
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public virtual void Dispatch(RepositoryEvent @event)
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IList<ListenerHandle> list = lists.Get(@event.GetListenerType());
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foreach (ListenerHandle handle in list)
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@event.Dispatch(handle.listener);
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private void Add(ListenerHandle handle)
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IList<ListenerHandle> list = lists.Get(handle.type);
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CopyOnWriteArrayList<ListenerHandle> newList;
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newList = new CopyOnWriteArrayList<ListenerHandle>();
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list = lists.PutIfAbsent(handle.type, newList);
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list.AddItem(handle);
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internal virtual void Remove(ListenerHandle handle)
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IList<ListenerHandle> list = lists.Get(handle.type);