using System;
using System.Collections.Specialized;
using System.Configuration;
using System.Configuration.Provider;
namespace SPSolutions.Configuration.Provider
{
	public class ProvidersHelper
	{
		public static ProviderBase InstantiateProvider(ProviderSettings providerSettings, Type providerType)
		{
			ProviderBase providerBase = null;
			try
			{
				string text = (providerSettings.Type == null) ? null : providerSettings.Type.Trim();
				if (string.IsNullOrEmpty(text))
				{
					throw new ArgumentException("Provider_no_type_name");
				}
				Type type = ConfigUtil.GetType(text, "type", providerSettings, true, true);
				if (!providerType.IsAssignableFrom(type))
				{
					throw new ArgumentException("Provider_must_implement_type");
				}
				providerBase = (ProviderBase)Activator.CreateInstance(type);
				NameValueCollection parameters = providerSettings.Parameters;
				NameValueCollection nameValueCollection = new NameValueCollection(parameters.Count, StringComparer.Ordinal);
				foreach (string name in parameters)
				{
					nameValueCollection[name] = parameters[name];
				}
				providerBase.Initialize(providerSettings.Name, nameValueCollection);
			}
			catch (Exception ex)
			{
				if (ex is ConfigurationException)
				{
					throw;
				}
				throw new ConfigurationErrorsException(ex.Message, providerSettings.ElementInformation.Properties["type"].Source, providerSettings.ElementInformation.Properties["type"].LineNumber);
			}
			return providerBase;
		}
		public static void InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
		{
			foreach (ProviderSettings providerSettings in configProviders)
			{
				providers.Add(ProvidersHelper.InstantiateProvider(providerSettings, providerType));
			}
		}
	}
}