Building a Middle Tier Component using NHibernate and Spring.NET

#region Licence

/*
 * Copyright � 2002-2005 the original author or authors.
 *
 * 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.
 */

#endregion

#region Imports

using System;
using AopAlliance.Intercept;
using Spring.Aop.Framework;
using Spring.Objects.Factory;
using log4net;
using System.Collections.Specialized;
#endregion

namespace Spring.Transaction.Interceptor
{
	/// <summary>
	///
	/// This Class describes a Transaction propagation behaviour and the Isolation level.
	/// 
	/// <author> Rod Johnson </author>
	/// <author> Moim Hossain (.NET)</author>
	/// </summary>
	public class TransactionAttribute
	{
		/// <summary>
		/// Default Transaction Attribute
		/// </summary>
		public static TransactionAttribute DefaultTransactionAttribute
		{
			get
			{
				return new TransactionAttribute( TransactionAttribute.PROPAGATION_REQUIRED );
			}
		}
		/// <summary>
		/// Constructor
		/// </summary>
		/// <param name="PropagationMode"></param>
		public TransactionAttribute(string PropagationMode)
		{
			SetPropagationMode( PropagationMode );
		}
		/// <summary>
		/// Define a propagation as MUST REQUIED, IF NOT EXISTS THEN CREATE A NEW ONE
		/// </summary>
		public static string PROPAGATION_REQUIRED = "PROPAGATION_REQUIRED";
		/// <summary>
		/// IF ALLREADY RUNNING ONE IT WILL WORK
		/// </summary>
		public static string PROPAGATION_SUPPORTS = "PROPAGATION_SUPPORTS";
		/// <summary>
		/// MUST RUN INSIDE A TRANSACTION BOUNDARY
		/// </summary>
		public static string PROPAGATION_MANDATORY = "PROPAGATION_MANDATORY";
		/// <summary>
		/// ALWAYS REQUIRED A NEW TRANSACTION BOUNDARY
		/// </summary>
		public static string PROPAGATION_REQUIRES_NEW = "PROPAGATION_REQUIRES_NEW";
		/// <summary>
		/// DOES NOT SUPPORTS TRANSACTION 
		/// </summary>
		public static string PROPAGATION_NOT_SUPPORTED = "PROPAGATION_NOT_SUPPORTED";
		/// <summary>
		/// NEVER RUN INSIDE A TRANSACTION BOUNDARY
		/// </summary>
		public static string PROPAGATION_NEVER = "PROPAGATION_NEVER";
		/// <summary>
		/// NESTED
		/// </summary>
		public static string PROPAGATION_NESTED = "PROPAGATION_NESTED";
		/// <summary>
		/// 
		/// </summary>
		private static string[]PROPAGATIONS = new string[]
			{
				PROPAGATION_REQUIRED,
				PROPAGATION_SUPPORTS,
				PROPAGATION_MANDATORY,
				PROPAGATION_REQUIRES_NEW,
				PROPAGATION_NOT_SUPPORTED,
				PROPAGATION_NEVER,
				PROPAGATION_NESTED
			};

		private string m_CurrentPropagationMode = string.Empty;
		/// <summary>
		/// Determine the current propagation mode
		/// </summary>
		public string CurrentPropagationMode
		{
			get
			{
				return m_CurrentPropagationMode;
			}
		}
		/// <summary>
		/// Set the current propagation mode
		/// </summary>
		/// <param name="PropagationMode"></param>
		public void SetPropagationMode( string PropagationMode )
		{
			bool l_InvalidPropagationDefined = true;

			foreach( string Propagation in PROPAGATIONS )
			{
				if( Propagation.Equals( PropagationMode ))
				{
					l_InvalidPropagationDefined = false;
					break;
				}
			}

			if( l_InvalidPropagationDefined )
				throw new ArgumentException("Invalid propagation defined.", "PropagationMode");

			m_CurrentPropagationMode = PropagationMode;
		}
	}
}