package 
{
	import flash.events.EventDispatcher;
	/**
	 * @author Sergey Gonchar
	 * @version 0.1
	 */
	public class ValueHolder extends EventDispatcher
	{
		private var value:*;
		private var type:Class;
		public function ValueHolder(value:*, type:Class) 
		{
			this.value = value;
			this.type = type;
		}
		public function get Value():*{ return value; }
		public function set Value(value:*):void
		{
			if (!(value is this.type)) { throw("Invalid data type") };
			if (this.value == value) return;
			var oldValue:* = this.value;
			this.value = value;
			this.dispatchEvent(new ChangeEvent(oldValue, this.value));
		}
	}
}