using System;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Serialization;
using System.IO;

namespace OrdersMgmt.Framework
{
	/// <summary>
	/// Summary description for XMLSerializer.
	/// </summary>
	public class XSerializer
	{
		public static object deserialize(string path,object source)
		{
			
			XmlSerializer ser = new XmlSerializer(source.GetType());
			StreamReader reader = new StreamReader(path);
			try 
			{
				source = ser.Deserialize(reader);
			}
			catch
			{
				reader.DiscardBufferedData();
				reader.Close();
				throw new Exception("could not deserialize object");
			}
			finally
			{
				reader.DiscardBufferedData();
				reader.Close();
			}
			
			return source;
		}
		public static object deserialize(XmlReader reader ,object source)
		{
			XmlSerializer ser = new XmlSerializer(source.GetType());
			MemoryStream ms;
			StreamWriter writer = null;
			try 
			{
				reader.MoveToContent();
				string xmlstring = reader.ReadOuterXml();
				reader.Close();
				ms = new MemoryStream();
				writer = new StreamWriter(ms);
				writer.Write(xmlstring);
				writer.Flush();
				ms.Position = 0;
				source = ser.Deserialize(ms);
				ms.Close();
				writer.Close();
				
			}
			catch(InvalidOperationException iex)
			{
				if(reader.ReadState != ReadState.Closed)
					reader.Close();
				if(writer!=null)
					writer.Close();
				throw new Exception("error deserializing object from xml reader",iex);
			}
			finally
			{
				if(reader.ReadState != ReadState.Closed)
                    reader.Close();
				if(writer!=null)
					writer.Close();
			}
			return source;
		}
		
		public static void serialize(ref StreamWriter writer,object source,XmlSerializer ser)
		{
			try
			{
				ser.Serialize(writer,source);
				
			}
			catch
			{
				writer.Flush();
				writer.Close();
				throw new Exception("could not serialize object");
			}
			finally
			{
				writer.Flush();
				writer.Close();
			}
		}
		public static void serialize(ref MemoryStream writer,object source,XmlSerializer ser)
		{
			try
			{
				ser.Serialize(writer,source);
				
			}
			catch
			{
				writer.Flush();
				writer.Close();
				throw new Exception("could not serialize object");
			}
			finally
			{
				writer.Flush();
				writer.Close();
			}
		}
		
		public static void serialize(string path, object source)
		{
			serialize(path,source,source.GetType());
			
		}
		public static void serialize(string path, object source,Type type)
		{
			XmlSerializer ser = new XmlSerializer(type);
			StreamWriter writer = new StreamWriter(path);
			serialize(ref writer,source,ser);
		}
		
		public XPathDocument serializeToXPathDocument(object source)
		{
			MemoryStream ms = new MemoryStream();
			XmlSerializer ser = new XmlSerializer(source.GetType());
			serialize(ref ms,source,ser);
			
			return new XPathDocument(ms);
		}

	}
}