WildcardEvaluator.cs

using Waher.Runtime.Collections;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Model;
using Waher.Script.Objects;
using Waher.Script.Operators.Vectors;
 
namespace Waher.Script.Persistence.SQL
{
    public class WildcardEvaluator : LeafIterativeEvaluator
    {
        private readonly ChunkedList<IElement> elements = new ChunkedList<IElement>();
 
        public WildcardEvaluator(Wildcard Node)
            : base(Node)
        {
        }
 
        public override void RestartEvaluator()
        {
            this.elements.Clear();
        }
 
        public override void AggregateElement(IElement Element)
        {
            this.elements.Add(Element);
        }
 
        public override IElement GetAggregatedResult()
        {
            return VectorDefinition.Encapsulate(this.elements, false, this.Node);
        }
 
        public override IElement Evaluate(Variables Variables)
        {
            if (Variables is ObjectProperties Properties)
                return Expression.Encapsulate(Properties.Object);
            else
                return ObjectValue.Null;
        }
    }
}