DateTimeLiteral.cs

using System;
using Waher.Content.Semantic.Ontologies;
using Waher.Content.Xml;
using Waher.Runtime.Inventory;
 
namespace Waher.Content.Semantic.Model.Literals
{
    public class DateTimeLiteral : SemanticLiteral
    {
        public DateTimeLiteral()
            : base()
        {
        }
 
        public DateTimeLiteral(DateTimeOffset Value)
            : base(Value, XML.Encode(Value))
        {
        }
 
        public DateTimeLiteral(DateTimeOffset Value, string StringValue)
            : base(Value, StringValue)
        {
        }
 
        public const string TypeUri = XmlSchema.Namespace + "dateTime";
 
        public override string StringType => TypeUri;
 
        public override Grade Supports(Type ValueType)
        {
            return ValueType == typeof(DateTime) ? Grade.Ok : Grade.NotAtAll;
        }
 
        public override ISemanticLiteral Parse(string Value, string DataType, string Language)
        {
            if (XML.TryParse(Value, out DateTimeOffset TP))
                return new DateTimeLiteral(TP, Value);
            else
                return new CustomLiteral(Value, DataType, Language);
        }
 
        public override ISemanticLiteral Encapsulate(object Value)
        {
            if (Value is DateTime Typed)
                return new DateTimeLiteral(Typed);
            else
                return new StringLiteral(Value?.ToString() ?? string.Empty);
        }
 
        public override bool Equals(object obj)
        {
            return obj is DateTimeLiteral Typed &&
                Typed.StringValue == this.StringValue;
        }
 
        public override int GetHashCode()
        {
            return this.StringValue.GetHashCode();
        }
    }
}