using System;
using System.IO;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Cms;

namespace Org.BouncyCastle.Cms
{
    // TODO[api] Make abstract
    public class CmsContentInfoParser
		: IDisposable
	{
		protected ContentInfoParser	contentInfo;
		protected Stream data;

		protected CmsContentInfoParser(
			Stream data)
		{
			if (data == null)
				throw new ArgumentNullException("data");

			this.data = data;

			try
			{
				Asn1StreamParser inStream = new Asn1StreamParser(data);

				this.contentInfo = new ContentInfoParser((Asn1SequenceParser)inStream.ReadObject());
			}
			catch (IOException e)
			{
				throw new CmsException("IOException reading content.", e);
			}
			catch (InvalidCastException e)
			{
				throw new CmsException("Unexpected object reading content.", e);
			}
		}

		[Obsolete("Dispose instead")]
		public void Close()
		{
            Dispose();
		}

		#region IDisposable

		public void Dispose()
		{
			Dispose(true);
			GC.SuppressFinalize(this);
		}

		protected virtual void Dispose(bool disposing)
		{
			if (disposing)
			{
				data.Dispose();
			}
		}

		#endregion
	}
}