SingletonKey.cs

using System;
using System.Text;
 
namespace Waher.Runtime.Inventory
{
    public class SingletonKey
    {
        private readonly Type type;
        private readonly object[] arguments;
 
        public SingletonKey(Type Type, object[] Arguments)
        {
            this.type = Type;
            this.arguments = Arguments;
        }
 
        public Type Type => this.type;
 
        public object[] Arguments => this.arguments;
 
        public override bool Equals(object obj)
        {
            int i, c;
 
            if (!(obj is SingletonKey Key) ||
                this.type != Key.type ||
                (this.arguments is null) ^ (Key.arguments is null) ||
                (c = this.arguments?.Length ?? 0) != (Key.arguments?.Length ?? 0))
            {
                return false;
            }
 
            for (i = 0; i < c; i++)
            {
                if (!this.arguments[i].Equals(Key.arguments[i]))
                    return false;
            }
 
            return true;
        }
 
        public override int GetHashCode()
        {
            int Result = this.type.GetHashCode();
 
            if (!(this.arguments is null))
            {
                foreach (object Obj in this.arguments)
                    Result ^= Result << 5 ^ (Obj?.GetHashCode() ?? 0);
            }
 
            return Result;
        }
 
        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();
            int i, c;
 
            sb.Append(this.type.FullName);
            sb.Append('(');
 
            for (i = 0, c = this.arguments?.Length ?? 0; i < c; i++)
            {
                if (i > 0)
                    sb.Append(", ");
 
                if (this.arguments[i] is null)
                    sb.Append("null");
                else
                    sb.Append(this.arguments[i].GetType().FullName);
            }
 
            sb.Append(')');
 
            return sb.ToString();
        }
    }
}