Switch and Providers

using System;


namespace Switch.Rules
{
	///////////////////////////////////////////////////////////////////////////
	//
	//	IsTypeRule class
	//
	/// <summary>
	/// This rule provides a test which passes for messages of a specified 
	/// type.
	/// </summary>
	public class IsTypeRule : Rule
	{
		private readonly Type _type;
		private readonly int _hashcode;

		public IsTypeRule(Type type)
		{
			_type = type;
			_hashcode = string.Format("{0}({1})", typeof(IsTypeRule), _type).GetHashCode();
		}

		public override bool Test(Message message)
		{
			return _type.IsInstanceOfType(message);
		}

		public override bool Equals(object obj)
		{
			IsTypeRule rule = obj as IsTypeRule;
			return rule != null && rule._type == _type;
		}

		public override int GetHashCode()
		{
			return _hashcode;
		}
	}
}