using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Data.Linq;
using System.IO;
using System.Xml;

namespace TheSimpleBeach.Data
{
public static class MappingSourceRepository
{
private static Dictionary<string, XmlMappingSource> _repository;

static MappingSourceRepository()
{
_repository = new Dictionary<string, XmlMappingSource>(2); 
}


static public XmlMappingSource GetXmlMappingSource(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
else
{
XmlMappingSource _mappingSource = null;

_repository.TryGetValue(path, out _mappingSource);

if (_mappingSource == null)
{
try
{
if (File.Exists(path))
{
using (Stream _stream = File.OpenRead(path))
{
_mappingSource = XmlMappingSource.FromStream(_stream);
_repository.Add(path, _mappingSource);
}
}
}
catch (Exception ex)
{
throw new ApplicationException("impossibile recuperare il file di mapping", ex);
}

}

return _mappingSource;
}
}
}
}