From 1f7ab418f67ea9bc307ba46604c373c45619876c Mon Sep 17 00:00:00 2001
From: Marco De Salvo <marco.desalvo@vodafone.com>
Date: Mon, 27 May 2024 16:22:27 +0200
Subject: [PATCH] Give datatypes a IsBuiltIn property

---
 RDFSharp.Test/Model/RDFDatatypeRegisterTest.cs | 8 ++++++--
 RDFSharp/Model/RDFDatatype.cs                  | 5 +++++
 RDFSharp/Model/RDFDatatypeRegister.cs          | 2 +-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/RDFSharp.Test/Model/RDFDatatypeRegisterTest.cs b/RDFSharp.Test/Model/RDFDatatypeRegisterTest.cs
index 3492f6b1..b98c27c7 100644
--- a/RDFSharp.Test/Model/RDFDatatypeRegisterTest.cs
+++ b/RDFSharp.Test/Model/RDFDatatypeRegisterTest.cs
@@ -43,7 +43,9 @@ public void ShouldGetDatatype()
 		{
 			Assert.IsNotNull(RDFDatatypeRegister.GetDatatype(RDFVocabulary.XSD.INTEGER.ToString()));
 			Assert.IsNotNull(RDFDatatypeRegister.GetDatatype(RDFModelEnums.RDFDatatypes.XSD_INTEGER));
-		}
+			//Test that these are built-in datatypes
+			Assert.IsTrue(RDFDatatypeRegister.GetDatatype(RDFVocabulary.XSD.INTEGER.ToString()).IsBuiltIn);
+        }
 
         [TestMethod]
         public void ShouldNotGetDatatype()
@@ -63,7 +65,9 @@ public void ShouldAddDatatype()
 
 			Assert.IsTrue(RDFDatatypeRegister.DatatypesCount >= 51);
 			Assert.IsNotNull(RDFDatatypeRegister.GetDatatype("ex:length6"));
-		}
+            //Test that this isn't built-in datatype
+            Assert.IsFalse(RDFDatatypeRegister.GetDatatype("ex:length6").IsBuiltIn);
+        }
 		#endregion
 	}
 }
\ No newline at end of file
diff --git a/RDFSharp/Model/RDFDatatype.cs b/RDFSharp/Model/RDFDatatype.cs
index 66292c44..9f3587c3 100644
--- a/RDFSharp/Model/RDFDatatype.cs
+++ b/RDFSharp/Model/RDFDatatype.cs
@@ -39,6 +39,11 @@ public class RDFDatatype
         /// Facets applied on the target datatype
         /// </summary>
         internal List<RDFFacet> Facets { get; set; }
+
+		/// <summary>
+		/// Indicates that the datatype is built-in into RDFModelEnums.RDFDatatypes
+		/// </summary>
+		internal bool IsBuiltIn { get; set; }
         #endregion
 
         #region Ctors
diff --git a/RDFSharp/Model/RDFDatatypeRegister.cs b/RDFSharp/Model/RDFDatatypeRegister.cs
index a6cb2379..835442ae 100644
--- a/RDFSharp/Model/RDFDatatypeRegister.cs
+++ b/RDFSharp/Model/RDFDatatypeRegister.cs
@@ -64,7 +64,7 @@ static RDFDatatypeRegister()
 				Register = new List<RDFDatatype>() };
 
 			foreach (RDFModelEnums.RDFDatatypes datatype in Enum.GetValues(typeof(RDFModelEnums.RDFDatatypes)).Cast<RDFModelEnums.RDFDatatypes>())
-				Instance.Register.Add(new RDFDatatype(new Uri(RDFModelUtilities.GetDatatypeFromEnum(datatype)), datatype, null));
+				Instance.Register.Add(new RDFDatatype(new Uri(RDFModelUtilities.GetDatatypeFromEnum(datatype)), datatype, null) { IsBuiltIn = true });
 		}
         #endregion