using System;
using System.Diagnostics.CodeAnalysis;

namespace BLToolkit.Reflection
{
    [SuppressMessage("Microsoft.Performance", "CA1813:AvoidUnsealedAttributes")]
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface)]
    public class ObjectFactoryAttribute : Attribute
    {
        public ObjectFactoryAttribute(Type type)
        {
            if (type == null) throw new ArgumentNullException("type");

            _objectFactory = Activator.CreateInstance(type) as IObjectFactory;

            if (_objectFactory == null)
                throw new ArgumentException(
                    string.Format("Type '{0}' does not implement IObjectFactory interface.", type));
        }

        private readonly IObjectFactory _objectFactory;
        public           IObjectFactory  ObjectFactory
        {
            get { return _objectFactory; }
        }
    }
}