DependencyOrder.cs

using System;
using System.Collections.Generic;
using System.Reflection;
 
namespace Waher.Runtime.Inventory
{
    public class DependencyOrder : IComparer<IModule>
    {
        public int Compare(IModule x, IModule y)
        {
            Type TypeX = x.GetType();
            Type TypeY = y.GetType();
            IEnumerable<ModuleDependencyAttribute> AttrsX = TypeX.GetTypeInfo().GetCustomAttributes<ModuleDependencyAttribute>();
            IEnumerable<ModuleDependencyAttribute> AttrsY = TypeY.GetTypeInfo().GetCustomAttributes<ModuleDependencyAttribute>();
            bool XDependsOnY = false;
            bool YDependsOnX = false;
 
            if (!(AttrsX is null))
            {
                foreach (ModuleDependencyAttribute AttrX in AttrsX)
                {
                    if (AttrX.DependsOn(TypeY))
                    {
                        XDependsOnY = true;
                        break;
                    }
                }
            }
 
            if (!(AttrsY is null))
            {
                foreach (ModuleDependencyAttribute AttrY in AttrsY)
                {
                    if (AttrY.DependsOn(TypeX))
                    {
                        YDependsOnX = true;
                        break;
                    }
                }
            }
 
            int i = XDependsOnY.CompareTo(YDependsOnX);
            if (i != 0)
                return i;
            else
                return TypeX.FullName.CompareTo(TypeY.FullName);
        }
    }
}