using System;
using Caliburn.Execution;

namespace Caliburn.Metadata
{
    public abstract class InfoBase : MetadataContainer
    {
        private IUnboundMethod _rescueMethod;

        public bool HasRescue
        {
            get { return _rescueMethod != null; }
        }

        public bool PerformRescue(object presenterInstance, Exception exception)
        {
            if(HasRescue)
            {
                _rescueMethod.Execute(presenterInstance, exception);
                return true;
            }
            else return false;
        }

        public void InitializeRescue(Type instanceType, string methodName)
        {
            _rescueMethod = UnboundMethodFactory.Create(instanceType.GetMethod(methodName));
        }
    }
}