Wildcard.cs

using System;
using System.Threading.Tasks;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Persistence.SQL.Groups;
 
namespace Waher.Script.Persistence.SQL
{
    public class Wildcard : ScriptLeafNode
    {
        public Wildcard(int Start, int Length, Expression Expression)
            : base(Start, Length, Expression)
        {
        }
 
        public override IElement Evaluate(Variables Variables)
        {
            if (Variables is ObjectProperties Properties && Properties.Object is GroupObject GroupObject)
                return Expression.Encapsulate(GroupObject.Objects);
            else
                throw new ScriptRuntimeException("Invalid context.", this);
        }
 
        public override Task<IElement> EvaluateAsync(Variables Variables)
        {
            return Task.FromResult<IElement>(this.Evaluate(Variables));
        }
 
        public override bool Equals(object obj)
        {
            return obj is Wildcard;
        }
 
        public override int GetHashCode()
        {
            return "*".GetHashCode();
        }
 
    }
}