//
// Transform.cs - Transform implementation for XML Signature
//
// Author:
//	Sebastien Pouliot (spouliot@motus.com)
//
// (C) 2002 Motus Technologies Inc. (http://www.motus.com)
//

using System.Text;
using System.Xml;

namespace System.Security.Cryptography.Xml { 

public abstract class Transform {

	protected string algo;
	protected Type[] input;
	protected Type[] output;

	public Transform () {}

	public string Algorithm {
		get { return algo; }
		set { algo = value; }
	}

	public abstract Type[] InputTypes {
		get;
	}

	public abstract Type[] OutputTypes {
		get;
	}

	protected abstract XmlNodeList GetInnerXml ();

	public abstract object GetOutput ();

	public abstract object GetOutput (Type type);

	public XmlElement GetXml () 
	{
		StringBuilder sb = new StringBuilder ();
		sb.Append ("<Transform Algorithm=\"");
		sb.Append (algo);
		sb.Append ("\"/>");

		XmlDocument doc = new XmlDocument ();
		doc.LoadXml (sb.ToString ());
		return doc.DocumentElement;
	}

	public abstract void LoadInnerXml (XmlNodeList nodeList);

	public abstract void LoadInput (object obj);
}

}