// Copyright 2003-2004 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.Framework
{
	using System;

	/// <summary>
	/// Enumeration used to mark the component's lifestyle.
	/// </summary>
	public enum Lifestyle
	{
		/// <summary>
		/// Singleton components are instantiated once, and shared
		/// between all clients.
		/// </summary>
		Singleton,
		/// <summary>
		/// Thread components have a unique instance per thread.
		/// </summary>
		Thread,
		/// <summary>
		/// Pooled components have a unique instance per client,
		/// but they are managed in a pool.
		/// </summary>
		Pooled,
		/// <summary>
		/// Transient components are created on demand.
		/// </summary>
		Transient,
		/// <summary>
		/// Custom lifestyle components should be managed by custom component factories.
		/// </summary>
		Custom
	}

	///<summary>
	///  Attribute used to mark a component as an Avalon component.
	///</summary>
	[AttributeUsage(AttributeTargets.Class,AllowMultiple=false,Inherited=false)]
	public sealed class AvalonComponentAttribute : Attribute
	{
		private Lifestyle m_lifestyle;
		private string m_name;

		/// <summary>
		/// Marks a class as a component, providing a configuration name and preferred lifestyle
		/// </summary>
		/// <param name="name">The component logical name (may be used for configuration elements)</param>
		/// <param name="lifestyle">The lifestyle used for the component</param>
		public AvalonComponentAttribute( string name, Lifestyle lifestyle )
		{
			m_lifestyle = lifestyle;
			m_name      = name;
		}

		/// <summary>
		/// The component name assigned to this component.
		/// </summary>
		public string Name
		{
			get
			{
				return m_name;
			}
		}

		/// <summary>
		/// The lifestyle associated with the component
		/// </summary>
		public Lifestyle Lifestyle
		{
			get
			{
				return m_lifestyle;
			}
		}
	}
}