using System;
using System.Collections.Generic;

public class EventDispatcher
{
	public void Subscribe<T>(Action<T> callback) where T : class
	{
		Action<object> action = delegate(object o)
		{
			callback((T)((object)o));
		};
		if (!this._events.ContainsKey(typeof(T)))
		{
			this._events[typeof(T)] = new HashSet<Action<object>>();
		}
		this._events[typeof(T)].Add(action);
		this._lookupTable.Add(callback, action);
	}

	public void Unsubscribe<T>(Action<T> callback) where T : class
	{
		if (this._events.ContainsKey(typeof(T)))
		{
			this._events[typeof(T)].Remove(this._lookupTable[callback]);
		}
		this._lookupTable.Remove(callback);
	}

	public void Invoke<T>(T evt) where T : class
	{
		HashSet<Action<object>> hashSet;
		if (this._events.TryGetValue(typeof(T), out hashSet) && hashSet != null)
		{
			foreach (Action<object> action in hashSet)
			{
				action(evt);
			}
		}
	}

	private Dictionary<Type, HashSet<Action<object>>> _events = new Dictionary<Type, HashSet<Action<object>>>();

	private Dictionary<object, Action<object>> _lookupTable = new Dictionary<object, Action<object>>();
}