//
// Mono.Data.ProviderSectionHandler
//
// Authors:
//   Brian Ritchie (brianlritchie@hotmail.com) 
//  
//
// Copyright (C) Brian Ritchie, 2002
// 

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.Xml;
using System.Configuration;

namespace Mono.Data
{
	public class ProviderSectionHandler : IConfigurationSectionHandler
	{
		public virtual object Create(object parent,object configContext,XmlNode section)
		{
			ProviderCollection providers=new ProviderCollection();
			
			XmlNodeList ProviderList = section.SelectNodes ("./provider");

			foreach (XmlNode ProviderNode in ProviderList) {
				Provider provider=new Provider(
					GetStringValue(ProviderNode,"name",true),
					GetStringValue(ProviderNode,"connection",true),
					GetStringValue(ProviderNode,"adapter",true),
					GetStringValue(ProviderNode,"command",true),
					GetStringValue(ProviderNode,"assembly",true),
					GetStringValue(ProviderNode,"description",false));
				providers.Add(provider);
			}
			return providers;
		}

		private string GetStringValue(XmlNode _node, string _attribute, bool required)
		{
			XmlNode a = _node.Attributes.RemoveNamedItem(_attribute);
			if (a == null) {
				if (required)
					throw new ConfigurationException("Attribute required: " + _attribute);
				else
					return null;
			}
			return a.Value;		
		}
	}
}