Simplify dependencies: take ResourceType instead of ClrType

src/JsonApiDotNetCore.OpenApi/SwaggerComponents/ResourceFieldObjectSchemaBuilder.cs

@@ -1,4 +1,5 @@
 using System.Reflection;
+using JsonApiDotNetCore.Configuration;
 using JsonApiDotNetCore.OpenApi.JsonApiMetadata;
 using JsonApiDotNetCore.OpenApi.JsonApiObjects.Relationships;
 using JsonApiDotNetCore.OpenApi.JsonApiObjects.ResourceObjects;
@@ -171,7 +172,7 @@ private void EnsureResourceIdentifierObjectSchemaExists(RelationshipAttribute re
 
         if (!ResourceIdentifierObjectSchemaExists(resourceIdentifierObjectType))
         {
-            GenerateResourceIdentifierObjectSchema(resourceIdentifierObjectType);
+            GenerateResourceIdentifierObjectSchema(resourceIdentifierObjectType, relationship.RightType);
         }
     }
 
@@ -180,15 +181,14 @@ private bool ResourceIdentifierObjectSchemaExists(Type resourceIdentifierObjectT
         return _schemaRepositoryAccessor.Current.TryLookupByType(resourceIdentifierObjectType, out _);
     }
 
-    private void GenerateResourceIdentifierObjectSchema(Type resourceIdentifierObjectType)
+    private void GenerateResourceIdentifierObjectSchema(Type resourceIdentifierObjectType, ResourceType resourceType)
     {
         OpenApiSchema referenceSchemaForResourceIdentifierObject =
             _defaultSchemaGenerator.GenerateSchema(resourceIdentifierObjectType, _schemaRepositoryAccessor.Current);
 
         OpenApiSchema fullSchemaForResourceIdentifierObject =
             _schemaRepositoryAccessor.Current.Schemas[referenceSchemaForResourceIdentifierObject.Reference.Id];
 
-        Type resourceType = resourceIdentifierObjectType.GetGenericArguments()[0];
         fullSchemaForResourceIdentifierObject.Properties[JsonApiPropertyName.Type] = _resourceTypeSchemaGenerator.Get(resourceType);
     }
 

src/JsonApiDotNetCore.OpenApi/SwaggerComponents/ResourceObjectSchemaGenerator.cs

@@ -38,8 +38,7 @@ public ResourceObjectSchemaGenerator(SchemaGenerator defaultSchemaGenerator, IRe
         _resourceGraph = resourceGraph;
         _options = options;
         _schemaRepositoryAccessor = schemaRepositoryAccessor;
-
-        _resourceTypeSchemaGenerator = new ResourceTypeSchemaGenerator(schemaRepositoryAccessor, resourceGraph, options.SerializerOptions.PropertyNamingPolicy);
+        _resourceTypeSchemaGenerator = new ResourceTypeSchemaGenerator(schemaRepositoryAccessor, options.SerializerOptions.PropertyNamingPolicy);
 
         _resourceFieldObjectSchemaBuilderFactory = resourceTypeInfo => new ResourceFieldObjectSchemaBuilder(resourceTypeInfo, schemaRepositoryAccessor,
             defaultSchemaGenerator, _resourceTypeSchemaGenerator, resourceFieldValidationMetadataProvider);
@@ -102,7 +101,7 @@ private void RemoveResourceIdIfPostResourceObject(ResourceTypeInfo resourceTypeI
 
     private void SetResourceType(OpenApiSchema fullSchemaForResourceObject, ResourceType resourceType)
     {
-        fullSchemaForResourceObject.Properties[JsonApiPropertyName.Type] = _resourceTypeSchemaGenerator.Get(resourceType.ClrType);
+        fullSchemaForResourceObject.Properties[JsonApiPropertyName.Type] = _resourceTypeSchemaGenerator.Get(resourceType);
 
         fullSchemaForResourceObject.Description = _resourceObjectDocumentationReader.GetDocumentationForType(resourceType);
     }

src/JsonApiDotNetCore.OpenApi/SwaggerComponents/ResourceTypeSchemaGenerator.cs

@@ -10,31 +10,26 @@ internal sealed class ResourceTypeSchemaGenerator
 {
     private const string ResourceTypeSchemaIdTemplate = "[ResourceName] Resource Type";
     private readonly ISchemaRepositoryAccessor _schemaRepositoryAccessor;
-    private readonly IResourceGraph _resourceGraph;
     private readonly JsonNamingPolicy? _namingPolicy;
     private readonly Dictionary<Type, OpenApiSchema> _resourceClrTypeSchemaCache = [];
 
-    public ResourceTypeSchemaGenerator(ISchemaRepositoryAccessor schemaRepositoryAccessor, IResourceGraph resourceGraph, JsonNamingPolicy? namingPolicy)
+    public ResourceTypeSchemaGenerator(ISchemaRepositoryAccessor schemaRepositoryAccessor, JsonNamingPolicy? namingPolicy)
     {
         ArgumentGuard.NotNull(schemaRepositoryAccessor);
-        ArgumentGuard.NotNull(resourceGraph);
 
         _schemaRepositoryAccessor = schemaRepositoryAccessor;
-        _resourceGraph = resourceGraph;
         _namingPolicy = namingPolicy;
     }
 
-    public OpenApiSchema Get(Type resourceClrType)
+    public OpenApiSchema Get(ResourceType resourceType)
     {
-        ArgumentGuard.NotNull(resourceClrType);
+        ArgumentGuard.NotNull(resourceType);
 
-        if (_resourceClrTypeSchemaCache.TryGetValue(resourceClrType, out OpenApiSchema? extendedReferenceSchema))
+        if (_resourceClrTypeSchemaCache.TryGetValue(resourceType.ClrType, out OpenApiSchema? extendedReferenceSchema))
         {
             return extendedReferenceSchema;
         }
 
-        ResourceType resourceType = _resourceGraph.GetResourceType(resourceClrType);
-
         var fullSchema = new OpenApiSchema
         {
             Type = "string",