OriginalFormRetriever.cs :  » Web-Frameworks » MvcContrib » Tarantino » RulesEngine » Mvc » C# / CSharp Open Source

using System;

namespace Tarantino.RulesEngine.Mvc{
  public class OriginalFormRetriever : IOriginalFormRetriever
  {
    public const string ORIGINAL_FORM_KEY = "ORIGINAL_FORM_KEY";
    private readonly ISerializer _serializer;
    private readonly IWebContext _webContext;

    public OriginalFormRetriever(IWebContext webContext, ISerializer serializer)
    {
      _webContext = webContext;
      _serializer = serializer;
    }

    #region IOriginalFormRetriever Members

    public T Retrieve<T>()
    {
      return (T) Retrieve(typeof (T));
    }

    public object Retrieve(Type formType)
    {
      string originalState = _webContext.GetRequestItem(ORIGINAL_FORM_KEY);
      if (originalState == null)
      {
        throw new ArgumentNullException("originalState",
                                        "Could not retrieve the original form.  Are you missing the Html.OriginalForm tag?");
      }
      object deserialize = _serializer.Deserialize(formType, originalState);
      return deserialize;
    }

    #endregion
  }
}