using System;
using System.Collections;

namespace Sleis.Utility
{
    public class ArgumentValidationUtility 
    {
        public static void ThrowOnNull(object obj, string message, object defaultValue)
        {
            ThrowOnNull(obj, message);
            if (obj.Equals(defaultValue))
            {
                throw new ArgumentNullException(message);
            }
        }

        public static void ThrowOnNotNull(object obj, string message)
        {
            if (obj != null)
            {
                throw new ArgumentNullException(message);
            }
        }

        public static void ThrowOnNull(object obj, string message)
        {
            if (obj == null)
            {
                throw new ArgumentNullException(message);
            }

        }

        public static void ThrowOnDefault(int val, string message)
        {
            if (val == 0)
            {
                throw new ArgumentNullException(message);
            }
        }

        public static void ThrowOnEmpty(string val, string message)
        {
            if (String.IsNullOrEmpty(val))
            {
                throw new ArgumentNullException(message);
            }
        }

        public static void ThrowOnEmpty(IEnumerable obj, string message)
        {
            ThrowOnNull(obj, message);

            ICollection col = obj as ICollection;
            if (col != null && col.Count < 1)
            {
                throw new ArgumentNullException(message);
            }

        }
    }
}