VEU.WathBody/3-app/1-lib/Kit.Helpers/Check.cs

namespace Kit.Helpers
{
    using System;
    using System.Diagnostics;

    /// <summary>
    /// a static class that checks if parameter is invalid and raises an exception in this case
    /// </summary>
    public static class Check
    {
        [DebuggerStepThrough]
        public static void ArgumentIsNotNull(object argument, string name)
        {
            if (argument == null)
            {
                throw new ArgumentNullException(name);
            }
        }

        [DebuggerStepThrough]
        public static void ArgumentIsNotNull(object argument, string name, string message)
        {
            if (argument == null)
            {
                throw new ArgumentException(message, name);
            }
        }

        [DebuggerStepThrough]
        public static void IntegerArgumentPositive(Int32 value, string name)
        {
            if (value < 1) throw new ArgumentOutOfRangeException(name, value, string.Empty);
        }

        [DebuggerStepThrough]
        public static void IntegerArgumentPositive(Int32? value, string name)
        {
            if (!value.HasValue) throw new ArgumentNullException(name);
            if (value.Value < 1) throw new ArgumentOutOfRangeException(name, value.Value, string.Empty);
        }

        [DebuggerStepThrough]
        public static void IntegerArgumentPositive(Int64 value, string name)
        {
            if (value < 1) throw new ArgumentOutOfRangeException(name, value, string.Empty);
        }

        [DebuggerStepThrough]
        public static void IntegerArgumentPositive(Int64? value, string name)
        {
            if (!value.HasValue) throw new ArgumentNullException(name);
            if (value.Value < 1) throw new ArgumentOutOfRangeException(name, value.Value, string.Empty);
        }

        [DebuggerStepThrough]
        public static void StringArgumentIsNotNullOrEmpty(string str, string name)
        {
            if (string.IsNullOrEmpty(str))
                throw new ArgumentNullException(name);

            str = str.Trim();
            if (string.IsNullOrEmpty(str))
                throw new ArgumentNullException(name);
        }

        [DebuggerStepThrough]
        public static void IsTrue(bool argument, string message)
        {
            if (argument == false)
            {
                throw new InvalidOperationException(message);
            }
        }

        [DebuggerStepThrough]
        public static void IsNotTrue(bool argument, string message)
        {
            if (argument == true)
            {
                throw new InvalidOperationException(message);
            }
        }

        [DebuggerStepThrough]
        public static void IsNotNull(object argument, string message)
        {
            if (argument == null)
            {
                throw new InvalidOperationException(message);
            }
        }
        /// <summary>
        /// Checks whether argument is of specified type
        /// Throws InvalidOperationException if argument is of wrong type
        /// </summary>
        /// <param name="argument">the argument to be checked</param>
        /// <param name="type">the Type</param>
        /// <param name="message">Implied to contain a {0} placeholder within in order to be replaced with string representation of the <para>type</para>  param </param>
        [DebuggerStepThrough]
        public static void ArgumentIsOfType(object argument, Type type, string message)
        {
            Check.ArgumentIsNotNull(argument, "argument");
            Check.ArgumentIsNotNull(type, "type");

            if (type != argument.GetType())
            {
                throw new InvalidOperationException(string.Format(message, type.ToString()));
            }
        }
        [DebuggerStepThrough]
        public static void StringArgumentIsNotNullOrEmpty(string str, string paramName, string message)
        {
            if (string.IsNullOrEmpty(str))
                throw new ArgumentNullException(paramName: paramName, message: message);

            str = str.Trim();
            if (string.IsNullOrEmpty(str))
                throw new ArgumentNullException(paramName: paramName, message: message);
        }
    }
}