IntegerLiteral.cs

using System;
using System.Numerics;
using Waher.Content.Semantic.Ontologies;
using Waher.Runtime.Inventory;
 
namespace Waher.Content.Semantic.Model.Literals
{
    public class IntegerLiteral : SemanticNumericLiteral
    {
        private readonly string dataType = null;
 
        public IntegerLiteral()
            : base()
        {
        }
 
        public IntegerLiteral(BigInteger Value)
            : base(Value, Value.ToString())
        {
        }
 
        public IntegerLiteral(BigInteger Value, string StringValue)
            : base(Value, StringValue)
        {
        }
 
        public IntegerLiteral(BigInteger Value, string StringValue, string DataType)
            : base(Value, StringValue)
        {
            this.dataType = DataType;
        }
 
        public const string TypeUri = XmlSchema.Namespace + "integer";
 
        public override string StringType => this.dataType ?? TypeUri;
 
        public override Grade Supports(Type ValueType)
        {
            return ValueType == typeof(BigInteger) ? Grade.Ok : Grade.NotAtAll;
        }
 
        public override double ComparableValue => (double)((BigInteger)this.Value);
 
        public override Grade Supports(string DataType)
        {
            switch (DataType)
            {
                case IntegerUri:
                case NegativeIntegerUri:
                case NonNegativeIntegerUri:
                case NonPositiveIntegerUri:
                case PositiveIntegerUri:
                    return Grade.Ok;
 
                default:
                    return Grade.NotAtAll;
            }
        }
 
        public const string IntegerUri = XmlSchema.Namespace + "integer";
 
        public const string NegativeIntegerUri = XmlSchema.Namespace + "negativeInteger";
 
        public const string NonNegativeIntegerUri = XmlSchema.Namespace + "nonNegativeInteger";
 
        public const string NonPositiveIntegerUri = XmlSchema.Namespace + "nonPositiveInteger";
 
        public const string PositiveIntegerUri = XmlSchema.Namespace + "positiveInteger";
 
 
        public override ISemanticLiteral Parse(string Value, string DataType, string Language)
        {
            if (BigInteger.TryParse(Value, out BigInteger i))
                return new IntegerLiteral(i, Value, DataType);
            else
                return new CustomLiteral(Value, DataType, Language);
        }
 
        public override ISemanticLiteral Encapsulate(object Value)
        {
            if (Value is BigInteger Typed)
                return new IntegerLiteral(Typed);
            else
                return new StringLiteral(Value?.ToString() ?? string.Empty);
        }
 
        public override bool Equals(object obj)
        {
            return obj is IntegerLiteral Typed &&
                Typed.StringValue == this.StringValue;
        }
 
        public override int GetHashCode()
        {
            return this.StringValue.GetHashCode();
        }
 
        public override int CompareTo(object obj)
        {
            if (obj is IntegerLiteral Typed)
                return ((BigInteger)this.Value).CompareTo((BigInteger)Typed.Value);
            else
                return base.CompareTo(obj);
        }
    }
}