/* This file is part of the db4o object database http://www.db4o.com

Copyright (C) 2004 - 2010  Versant Corporation http://www.versant.com

db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program.  If not, see http://www.gnu.org/licenses/. */
using Db4objects.Db4o.Foundation;
using Db4objects.Db4o.Internal;
using Db4objects.Db4o.Internal.Delete;
using Db4objects.Db4o.Internal.Marshall;
using Db4objects.Db4o.Marshall;
using Db4objects.Db4o.Typehandlers;

namespace Db4objects.Db4o.Typehandlers
{
	/// <summary>Typehandler that ignores all fields on a class</summary>
	public class IgnoreFieldsTypeHandler : IReferenceTypeHandler, ICascadingTypeHandler
	{
		public static readonly ITypeHandler4 Instance = new Db4objects.Db4o.Typehandlers.IgnoreFieldsTypeHandler
			();

		private IgnoreFieldsTypeHandler()
		{
		}

		public virtual void Defragment(IDefragmentContext context)
		{
		}

		// do nothing
		/// <exception cref="Db4objects.Db4o.Ext.Db4oIOException"></exception>
		public virtual void Delete(IDeleteContext context)
		{
		}

		// do nothing
		public virtual void Activate(IReferenceActivationContext context)
		{
		}

		public virtual void Write(IWriteContext context, object obj)
		{
		}

		public virtual IPreparedComparison PrepareComparison(IContext context, object obj
			)
		{
			return null;
		}

		public virtual void CascadeActivation(IActivationContext context)
		{
		}

		// do nothing
		public virtual void CollectIDs(QueryingReadContext context)
		{
		}

		// do nothing
		public virtual ITypeHandler4 ReadCandidateHandler(QueryingReadContext context)
		{
			return null;
		}
	}
}
