Fixed DataLoader Generator Issues

src/HotChocolate/Core/src/Types.Analyzers/FileBuilders/DataLoaderFileBuilder.cs

@@ -16,7 +16,7 @@ public sealed class DataLoaderFileBuilder : IDisposable
 
     public DataLoaderFileBuilder()
     {
-        _sb = StringBuilderPool.Get();
+        _sb = PooledObjects.GetStringBuilder();
         _writer = new CodeWriter(_sb);
     }
 
@@ -220,10 +220,11 @@ public void WriteDataLoaderLoadMethod(
                 WellKnownTypes.ReadOnlyList,
                 key.ToFullyQualified());
             _writer.WriteIndentedLine(
-                "global::{0}<{1}<{2}>> results,",
+                "global::{0}<{1}<{2}{3}>> results,",
                 WellKnownTypes.Memory,
                 WellKnownTypes.Result,
-                value.ToFullyQualified());
+                value.ToFullyQualified(),
+                kind is DataLoaderKind.Group ? "[]" : string.Empty);
             _writer.WriteIndentedLine(
                 "global::{0} ct)",
                 WellKnownTypes.CancellationToken);
@@ -321,10 +322,11 @@ public void WriteDataLoaderLoadMethod(
                 WellKnownTypes.ReadOnlyList,
                 key.ToFullyQualified());
             _writer.WriteIndentedLine(
-                "global::{0}<{1}<{2}>> results,",
+                "global::{0}<{1}<{2}{3}>> results,",
                 WellKnownTypes.Span,
                 WellKnownTypes.Result,
-                value.ToFullyQualified());
+                value.ToFullyQualified(),
+                kind is DataLoaderKind.Group ? "[]" : string.Empty);
             _writer.WriteIndentedLine(
                 "global::{0} resultMap)",
                 ExtractMapType(method.ReturnType));
@@ -482,7 +484,7 @@ public void Dispose()
             return;
         }
 
-        StringBuilderPool.Return(_sb);
+        PooledObjects.Return(_sb);
         _sb = default!;
         _writer = default!;
         _disposed = true;

src/HotChocolate/Core/src/Types.Analyzers/FileBuilders/DataLoaderModuleFileBuilder.cs

@@ -14,7 +14,7 @@ public sealed class DataLoaderModuleFileBuilder : IDisposable
     public DataLoaderModuleFileBuilder(string moduleName)
     {
         _moduleName = moduleName;
-        _sb = StringBuilderPool.Get();
+        _sb = PooledObjects.GetStringBuilder();
         _writer = new CodeWriter(_sb);
     }
 
@@ -106,7 +106,7 @@ public void Dispose()
             return;
         }
 
-        StringBuilderPool.Return(_sb);
+        PooledObjects.Return(_sb);
         _sb = default!;
         _writer = default!;
         _disposed = true;

src/HotChocolate/Core/src/Types.Analyzers/FileBuilders/ModuleFileBuilder.cs

@@ -17,7 +17,7 @@ public ModuleFileBuilder(string moduleName, string ns)
     {
         _moduleName = moduleName;
         _ns = ns;
-        _sb = StringBuilderPool.Get();
+        _sb = PooledObjects.GetStringBuilder();
         _writer = new CodeWriter(_sb);
     }
 
@@ -304,7 +304,7 @@ public void Dispose()
             return;
         }
 
-        StringBuilderPool.Return(_sb);
+        PooledObjects.Return(_sb);
         _sb = default!;
         _writer = default!;
         _disposed = true;

src/HotChocolate/Core/src/Types.Analyzers/FileBuilders/OperationFieldFileBuilder.cs

@@ -14,7 +14,7 @@ public sealed class OperationFieldFileBuilder : IDisposable
 
     public OperationFieldFileBuilder()
     {
-        _sb = StringBuilderPool.Get();
+        _sb = PooledObjects.GetStringBuilder();
         _writer = new CodeWriter(_sb);
     }
 
@@ -125,7 +125,7 @@ public void Dispose()
             return;
         }
 
-        StringBuilderPool.Return(_sb);
+        PooledObjects.Return(_sb);
         _sb = default!;
         _writer = default!;
         _disposed = true;

src/HotChocolate/Core/src/Types.Analyzers/FileBuilders/RequestMiddlewareFileBuilder.cs

@@ -21,7 +21,7 @@ public RequestMiddlewareFileBuilder(string moduleName, string ns)
         _ns = ns;
 
         _id = Guid.NewGuid().ToString("N");
-        _sb = StringBuilderPool.Get();
+        _sb = PooledObjects.GetStringBuilder();
         _writer = new(_sb);
     }
 
@@ -290,7 +290,7 @@ public void Dispose()
             return;
         }
 
-        StringBuilderPool.Return(_sb);
+        PooledObjects.Return(_sb);
         _sb = default!;
         _writer = default!;
         _disposed = true;

src/HotChocolate/Core/src/Types.Analyzers/Generators/TypesSyntaxGenerator.cs

@@ -27,15 +27,15 @@ public void Generate(
             return;
         }
 
-        var sb = StringBuilderPool.Get();
+        var sb = PooledObjects.GetStringBuilder();
 
         WriteTypes(context, syntaxInfos, sb);
 
         sb.Clear();
 
         WriteResolvers(context, syntaxInfos, sb);
 
-        StringBuilderPool.Return(sb);
+        PooledObjects.Return(sb);
     }
 
     private static void WriteTypes(

src/HotChocolate/Core/src/Types.Analyzers/Helpers/StringBuilderPool.cs → src/HotChocolate/Core/src/Types.Analyzers/Helpers/PooledObjects.cs

@@ -2,11 +2,11 @@
 
 namespace HotChocolate.Types.Analyzers.Helpers;
 
-public static class StringBuilderPool
+public static class PooledObjects
 {
     private static StringBuilder? _stringBuilder;
 
-    public static StringBuilder Get()
+    public static StringBuilder GetStringBuilder()
     {
         var stringBuilder = Interlocked.Exchange(ref _stringBuilder, null);
         return stringBuilder ?? new StringBuilder();

src/HotChocolate/Core/src/Types.Analyzers/Inspectors/DataLoaderInspector.cs

@@ -1,5 +1,6 @@
 using System.Diagnostics.CodeAnalysis;
 using HotChocolate.Types.Analyzers.Filters;
+using HotChocolate.Types.Analyzers.Helpers;
 using HotChocolate.Types.Analyzers.Models;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp;
@@ -16,7 +17,7 @@ public bool TryHandle(
         GeneratorSyntaxContext context,
         [NotNullWhen(true)] out SyntaxInfo? syntaxInfo)
     {
-        if (context.Node is MethodDeclarationSyntax { AttributeLists.Count: > 0, } methodSyntax)
+        if (context.Node is MethodDeclarationSyntax { AttributeLists.Count: > 0 } methodSyntax)
         {
             foreach (var attributeListSyntax in methodSyntax.AttributeLists)
             {
@@ -35,13 +36,11 @@ public bool TryHandle(
                     if (fullName.Equals(WellKnownAttributes.DataLoaderAttribute, Ordinal) &&
                         context.SemanticModel.GetDeclaredSymbol(methodSyntax) is { } methodSymbol)
                     {
-                        var dataLoader = new DataLoaderInfo(
+                        syntaxInfo = new DataLoaderInfo(
                             attributeSyntax,
                             attributeSymbol,
                             methodSymbol,
                             methodSyntax);
-
-                        syntaxInfo = dataLoader;
                         return true;
                     }
                 }

src/HotChocolate/Core/test/Types.Analyzers.Tests/Types/DataLoaders.cs

@@ -14,4 +14,14 @@ public static int CreateLookupKey(string key)
 
     public static int CreateLookupKey(Guid key)
         => default!;
+
+    [DataLoader]
+    public static Task<ILookup<int, string>> GetSomeInfoGroupedById(
+        IReadOnlyList<int> keys)
+        => default!;
+
+    [DataLoader]
+    public static Task<string> GetSomeInfoCacheById(
+        int key)
+        => default!;
 }

src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/DataLoaderTests.GenerateSource_GroupedDataLoader_MatchesSnapshot.md

@@ -38,7 +38,7 @@ namespace TestNamespace
 
         protected override async global::System.Threading.Tasks.ValueTask FetchAsync(
             global::System.Collections.Generic.IReadOnlyList<int> keys,
-            global::System.Memory<GreenDonut.Result<Entity>> results,
+            global::System.Memory<GreenDonut.Result<Entity[]>> results,
             global::System.Threading.CancellationToken ct)
         {
             var temp = await TestNamespace.TestClass.GetEntitiesByIdAsync(keys, ct).ConfigureAwait(false);
@@ -47,7 +47,7 @@ namespace TestNamespace
 
         private void CopyResults(
             global::System.Collections.Generic.IReadOnlyList<int> keys,
-            global::System.Span<GreenDonut.Result<Entity>> results,
+            global::System.Span<GreenDonut.Result<Entity[]>> results,
             global::System.Linq.ILookup<int, Entity> resultMap)
         {
             for (var i = 0; i < keys.Count; i++)