//
// ManagedXslTransform
//
// Authors:
//	Ben Maurer (bmaurer@users.sourceforge.net)
//
// (C) 2003 Ben Maurer
//

using System;
using System.Collections;
using System.IO;
using System.Security.Policy;
using System.Text;
using System.Xml.XPath;
using Mono.Xml.Xsl;


namespace System.Xml.Xsl {
	internal class ManagedXslTransform : XslTransformImpl {
		CompiledStylesheet s;
		
		
		public override void Load (XPathNavigator stylesheet, XmlResolver resolver, Evidence evidence)
		{
			s = new Compiler ().Compile (stylesheet, resolver, evidence);
		}

		public override void Transform (XPathNavigator input, XsltArgumentList args, XmlWriter output, XmlResolver resolver)
		{
			if (s == null)
				throw new XsltException ("No stylesheet was loaded.", null);

			Outputter outputter = new GenericOutputter (output, s.Outputs, null);
			new XslTransformProcessor (s).Process (input, outputter, args, resolver);
			output.Flush ();
		}

		public override void Transform (XPathNavigator input, XsltArgumentList args, TextWriter output, XmlResolver resolver) {
			Outputter outputter = new GenericOutputter(output, s.Outputs, output.Encoding);			
//			outputter.WriteStartDocument();
			new XslTransformProcessor (s).Process (input, outputter, args, resolver);
			switch (outputter.WriteState) {
			case WriteState.Start:
			case WriteState.Closed:
				break;
			default:
				outputter.WriteEndDocument();
				break;
			}
			output.Flush ();
		}
		
		public override void Transform (XPathNavigator input, XsltArgumentList args, Stream output, XmlResolver resolver)
		{
			XslOutput xslOutput = (XslOutput)s.Outputs[String.Empty];
			Transform (input, args, new XmlTextWriter (output, xslOutput.Encoding), resolver);
		}
	}
}