Defined IScopedNode

src/Hl7.Fhir.Base/CompatibilitySuppressions.xml

@@ -8,6 +8,13 @@
     <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
     <IsBaselineSuppression>true</IsBaselineSuppression>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Hl7.Fhir.ElementModel.ScopedNodeExtensions</Target>
+    <Left>lib/net8.0/Hl7.Fhir.Base.dll</Left>
+    <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0001</DiagnosticId>
     <Target>T:Hl7.Fhir.ElementModel.Types.MetricConfiguration</Target>
@@ -22,6 +29,20 @@
     <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
     <IsBaselineSuppression>true</IsBaselineSuppression>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Hl7.Fhir.ElementModel.ScopedNode.Parent</Target>
+    <Left>lib/net8.0/Hl7.Fhir.Base.dll</Left>
+    <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Hl7.Fhir.ElementModel.ScopedNode.Children(System.String)</Target>
+    <Left>lib/net8.0/Hl7.Fhir.Base.dll</Left>
+    <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0002</DiagnosticId>
     <Target>M:Hl7.Fhir.ElementModel.TypedElementExtensions.IsExactlyEqualTo``1(``0,``0,System.Boolean)</Target>
@@ -85,6 +106,13 @@
     <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
     <IsBaselineSuppression>true</IsBaselineSuppression>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Hl7.Fhir.FhirPath.FhirEvaluationContext.get_ElementResolver</Target>
+    <Left>lib/net8.0/Hl7.Fhir.Base.dll</Left>
+    <Right>lib/net8.0/Hl7.Fhir.Base.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0002</DiagnosticId>
     <Target>M:Hl7.Fhir.FhirPath.FhirEvaluationContext.get_TerminologyService</Target>

src/Hl7.Fhir.Base/ElementModel/ScopedNode.cs

@@ -6,18 +6,20 @@
  * available at https://raw.githubusercontent.com/FirelyTeam/firely-net-sdk/master/LICENSE
  */
 
+using Hl7.Fhir.Model;
 using Hl7.Fhir.Specification;
+using Hl7.Fhir.Support.Poco;
 using Hl7.Fhir.Utility;
 using System;
-using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 
 #nullable enable
 
 namespace Hl7.Fhir.ElementModel
 {
-    public class ScopedNode : ITypedElement, IAnnotated, IExceptionSource
+    public class ScopedNode : IScopedNode, IAnnotated, IExceptionSource
     {
         private class Cache
         {
@@ -54,7 +56,6 @@ private ScopedNode(ScopedNode parentNode, ScopedNode? parentResource, ITypedElem
 
             if (Current.Name == "entry")
                 _fullUrl = Current.Children("fullUrl").FirstOrDefault()?.Value as string ?? _fullUrl;
-
         }
 
         public ExceptionNotificationHandler? ExceptionHandler { get; set; }
@@ -72,7 +73,7 @@ private ScopedNode(ScopedNode parentNode, ScopedNode? parentResource, ITypedElem
         /// <summary>
         /// The resource or element which is the direct parent of this node.
         /// </summary>
-        public readonly ScopedNode? Parent;
+        public IScopedNode? Parent { get; }
 
         /// <summary>
         /// Returns the location of the current element within its most direct parent resource or datatype.
@@ -87,6 +88,19 @@ private ScopedNode(ScopedNode parentNode, ScopedNode? parentResource, ITypedElem
         /// <inheritdoc/>
         public string Name => Current.Name;
 
+        /// <summary>
+        /// Will be replaced by a different implementation in the future.
+        /// </summary>
+        public NodeType Type => this switch
+        {
+            { AtResource: true } when Current.Children("contained").Any() => NodeType.DomainResource | NodeType.Resource,
+            { InstanceType: FhirTypeConstants.BUNDLE } => NodeType.Bundle | NodeType.Resource,
+            { AtResource: true } => NodeType.Resource,
+            { InstanceType: FhirTypeConstants.REFERENCE or FhirTypeConstants.CANONICAL or FhirTypeConstants.CODEABLEREFERENCE } => NodeType.Reference,
+            { Value: not null } => NodeType.Primitive,
+            _ => 0
+        };
+
         /// <inheritdoc/>
         public string? InstanceType => Current.InstanceType;
 
@@ -96,6 +110,12 @@ private ScopedNode(ScopedNode parentNode, ScopedNode? parentResource, ITypedElem
         /// <inheritdoc/>
         public string Location => Current.Location;
 
+        public bool TryResolveBundleEntry(string fullUrl, [NotNullWhen(true)] out IScopedNode? result)
+            => (result = ((ReferencedResourceCache)this.BundledResources()).ResolveReference(fullUrl)) is not null;
+
+        public bool TryResolveContainedEntry(string id, [NotNullWhen(true)] out IScopedNode? result) 
+            => (result = (this.ContainedResourcesWithId()).ResolveReference(id)) is not null;
+
         /// <summary>
         /// Whether this node is a root element of a Resource.
         /// </summary>
@@ -264,7 +284,13 @@ private set
         public IEnumerable<object> Annotations(Type type) => type == typeof(ScopedNode) ? (new[] { this }) : Current.Annotations(type);
 
         /// <inheritdoc />
-        public IEnumerable<ITypedElement> Children(string? name = null) =>
+        IEnumerable<ITypedElement> ITypedElement.Children(string? name) =>
             Current.Children(name).Select(c => new ScopedNode(this, ParentResource, c, _fullUrl));
+
+        /// <inheritdoc />
+        public IEnumerable<IScopedNode> Children(string? name = null) =>
+            Current.Children(name).Select(c => new ScopedNode(this, ParentResource, c, _fullUrl));
+
+        public string ShortPath => Current is ElementNode en ? en.ShortPath : Current.Location;
     }
 }

src/Hl7.Fhir.Base/FhirPath/ElementNavFhirExtensions.cs

@@ -40,8 +40,8 @@ public static void PrepareFhirSymbolTableFunctions()
         public static SymbolTable AddFhirExtensions(this SymbolTable t)
         {
             t.Add("hasValue", (ITypedElement f) => f.HasValue(), doNullProp: false);
-            t.Add("resolve", (ITypedElement f, EvaluationContext ctx) => resolver(f, ctx), doNullProp: false);
-            t.Add("resolve", (IEnumerable<ITypedElement> f, EvaluationContext ctx) => f.Select(fi => resolver(fi, ctx)), doNullProp: false);
+            t.Add("resolve", (IScopedNode f, EvaluationContext ctx) => resolver(f, ctx), doNullProp: false);
+            t.Add("resolve", (IEnumerable<IScopedNode> f, EvaluationContext ctx) => f.Select(fi => resolver(fi, ctx)), doNullProp: false);
 
             t.Add("memberOf", (ITypedElement input, string valueset, EvaluationContext ctx) => MemberOf(input, valueset, ctx), doNullProp: false);
 
@@ -69,7 +69,7 @@ public static SymbolTable AddFhirExtensions(this SymbolTable t)
 
             return t;
 
-            static ITypedElement? resolver(ITypedElement f, EvaluationContext ctx)
+            static IScopedNode? resolver(IScopedNode f, EvaluationContext ctx)
             {
                 return ctx is FhirEvaluationContext fctx ? f.Resolve(fctx.ElementResolver) : f.Resolve();
             }

src/Hl7.Fhir.Base/FhirPath/FhirEvaluationContext.cs

@@ -7,6 +7,7 @@
  */
 
 using Hl7.Fhir.ElementModel;
+using Hl7.Fhir.Model;
 using Hl7.Fhir.Specification.Terminology;
 using Hl7.FhirPath;
 using System;
@@ -78,9 +79,9 @@ private static ITypedElement toNearestResource(ScopedNode node)
             return scan;
         }
 
-        private Func<string, ITypedElement>? _elementResolver;
+        private Func<string, IScopedNode>? _elementResolver;
 
-        public Func<string, ITypedElement>? ElementResolver
+        public Func<string, IScopedNode>? ElementResolver
         {
             get { return _elementResolver; }
             set { _elementResolver = value; }

src/Hl7.Fhir.Base/Hl7.Fhir.Base.csproj

@@ -11,6 +11,7 @@
 	</PropertyGroup>
 
 	<ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.1'">
+		<PackageReference Include="System.Buffers" Version="4.5.1" />
 		<PackageReference Include="System.Text.Json" Version="8.0.5" />
 	</ItemGroup>