// Copyright 2004 The Apache Software Foundation
// 
// Licensed 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.

namespace Apache.Avalon.Castle.MicroKernel.Factory.Default
{
	using System;
	using System.Collections;

	/// <summary>
	/// ComponentInstanceBurden is responsible for keep tracking 
	/// of dependencies assembled by the container - not by 
	/// the component code - and release it correctly on disposal
	/// </summary>
	public class ComponentInstanceBurden
	{
		private ArrayList m_list = new ArrayList();

		public ComponentInstanceBurden()
		{
		}

		public void AddBurden( Object instance, IHandler handler )
		{
			m_list.Add( new BurdenData( instance, handler ) );
		}

		public bool HasBurden
		{
			get
			{
				return m_list.Count != 0;
			}
		}

		public void ReleaseBurden()
		{
			foreach( BurdenData data in m_list )
			{
				data.Handler.Release( data.Instance );
			}

			m_list.Clear();
		}
	}

	class BurdenData 
	{
		private object m_instance;
		private IHandler m_handler;

		public BurdenData( object instance, IHandler handler )
		{
			AssertUtil.ArgumentNotNull( instance, "instance" );
			AssertUtil.ArgumentNotNull( handler, "handler" );

			m_instance = instance;
			m_handler = handler;
		}

		public object Instance
		{
			get
			{
				return m_instance;
			}
		}

		public IHandler Handler
		{
			get
			{
				return m_handler;
			}
		}
	}
}