diff --git a/config/filters.yaml b/config/filters.yaml
index c96ee6ab3..3b688891c 100644
--- a/config/filters.yaml
+++ b/config/filters.yaml
@@ -5,6 +5,8 @@ services:
     public: false
 
   #Filter
+
+  #Common
   Pimcore\Bundle\StudioApiBundle\Service\Filter\FilterLoaderInterface:
     class: Pimcore\Bundle\StudioApiBundle\Service\Filter\Loader\TaggedIteratorAdapter
 
@@ -27,4 +29,8 @@ services:
     tags: [ 'pimcore.studio_api.collection.filter' ]
 
   Pimcore\Bundle\StudioApiBundle\Filter\PathFilter:
-    tags: [ 'pimcore.studio_api.collection.filter' ]
\ No newline at end of file
+    tags: [ 'pimcore.studio_api.collection.filter' ]
+
+  # DataObject
+  Pimcore\Bundle\StudioApiBundle\Filter\DataObject\ClassIdFilter:
+      tags: [ 'pimcore.studio_api.collection.filter' ]
\ No newline at end of file
diff --git a/src/Attributes/Parameters/Query/ClassIdParameter.php b/src/Attributes/Parameters/Query/ClassIdParameter.php
new file mode 100644
index 000000000..c71816cc4
--- /dev/null
+++ b/src/Attributes/Parameters/Query/ClassIdParameter.php
@@ -0,0 +1,47 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Attributes\Parameters\Query;
+
+use Attribute;
+use OpenApi\Attributes\QueryParameter;
+use OpenApi\Attributes\Schema;
+use Pimcore\Model\DataObject\ClassDefinition;
+
+#[Attribute(Attribute::TARGET_CLASS | Attribute::TARGET_METHOD | Attribute::IS_REPEATABLE)]
+final class ClassIdParameter extends QueryParameter
+{
+    public function __construct()
+    {
+        // TODO Find better concept for this
+        $classDefinitions = new ClassDefinition\Listing();
+        $classNames = [];
+        $description = 'Filter by class.';
+        foreach ($classDefinitions->load() as $classDefinition) {
+            $classNames[] = $classDefinition->getId();
+            $description .= '<br>' . $classDefinition->getId() . ' => ' . $classDefinition->getName();
+        }
+        $description .= '<br><br>';
+
+        parent::__construct(
+            name: 'classId',
+            description: $description,
+            in: 'query',
+            required: false,
+            schema: new Schema(type: 'string', enum:  $classNames, example: null),
+        );
+    }
+}
diff --git a/src/Controller/Api/Assets/CollectionController.php b/src/Controller/Api/Assets/CollectionController.php
index 9bdd6a7e2..def4ae18a 100644
--- a/src/Controller/Api/Assets/CollectionController.php
+++ b/src/Controller/Api/Assets/CollectionController.php
@@ -32,7 +32,7 @@
 use Pimcore\Bundle\StudioApiBundle\Controller\Api\AbstractApiController;
 use Pimcore\Bundle\StudioApiBundle\Controller\Trait\PaginatedResponseTrait;
 use Pimcore\Bundle\StudioApiBundle\Dto\Asset;
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
 use Pimcore\Bundle\StudioApiBundle\Exception\InvalidQueryTypeException;
 use Pimcore\Bundle\StudioApiBundle\Service\AssetSearchServiceInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\Filter\FilterServiceInterface;
@@ -83,10 +83,10 @@ public function __construct(
     /**
      * @throws InvalidQueryTypeException
      */
-    public function getAssets(#[MapQueryString] Collection $collection): JsonResponse
+    public function getAssets(#[MapQueryString] Parameters $parameters): JsonResponse
     {
         /** @var AssetQuery $assetQuery */
-        $assetQuery = $this->filterService->applyCollectionFilter($collection, 'asset');
+        $assetQuery = $this->filterService->applyCollectionFilter($parameters, 'asset');
 
         $result = $this->assetSearchService->searchAssets($assetQuery);
 
diff --git a/src/Controller/Api/DataObjects/CollectionController.php b/src/Controller/Api/DataObjects/CollectionController.php
index 1b321ba39..bed874e6f 100644
--- a/src/Controller/Api/DataObjects/CollectionController.php
+++ b/src/Controller/Api/DataObjects/CollectionController.php
@@ -18,6 +18,7 @@
 
 use OpenApi\Attributes\Get;
 use OpenApi\Attributes\JsonContent;
+use Pimcore\Bundle\StudioApiBundle\Attributes\Parameters\Query\ClassIdParameter;
 use Pimcore\Bundle\StudioApiBundle\Attributes\Parameters\Query\ExcludeFoldersParameter;
 use Pimcore\Bundle\StudioApiBundle\Attributes\Parameters\Query\IdSearchTermParameter;
 use Pimcore\Bundle\StudioApiBundle\Attributes\Parameters\Query\PageParameter;
@@ -31,8 +32,8 @@
 use Pimcore\Bundle\StudioApiBundle\Config\Tags;
 use Pimcore\Bundle\StudioApiBundle\Controller\Api\AbstractApiController;
 use Pimcore\Bundle\StudioApiBundle\Controller\Trait\PaginatedResponseTrait;
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
 use Pimcore\Bundle\StudioApiBundle\Dto\DataObject;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\DataObjectParameters;
 use Pimcore\Bundle\StudioApiBundle\Exception\InvalidQueryTypeException;
 use Pimcore\Bundle\StudioApiBundle\Service\DataObjectSearchServiceInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\Filter\FilterServiceInterface;
@@ -74,6 +75,7 @@ public function __construct(
     #[PathParameter]
     #[PathIncludeParentParameter]
     #[PathIncludeDescendantsParameter]
+    #[ClassIdParameter]
     #[SuccessResponse(
         description: 'Paginated data objects with total count as header param',
         content: new JsonContent(ref: DataObject::class)
@@ -83,11 +85,11 @@ public function __construct(
     /**
      * @throws InvalidQueryTypeException
      */
-    public function getDataObjects(#[MapQueryString] Collection $collection): JsonResponse
+    public function getDataObjects(#[MapQueryString] DataObjectParameters $parameters): JsonResponse
     {
 
         /** @var DataObjectQuery $dataObjectQuery */
-        $dataObjectQuery = $this->filterService->applyCollectionFilter($collection, 'dataObject');
+        $dataObjectQuery = $this->filterService->applyCollectionFilter($parameters, 'dataObject');
 
         $result = $this->dataObjectSearchService->searchDataObjects($dataObjectQuery);
 
diff --git a/src/Dto/DataObject.php b/src/Dto/DataObject.php
index 2d1565ebc..36e71dc20 100644
--- a/src/Dto/DataObject.php
+++ b/src/Dto/DataObject.php
@@ -27,7 +27,9 @@
 {
     public function __construct(
         #[Property(description: 'ID', type: 'integer', example: 83)]
-        private int $id
+        private int $id,
+        #[Property(description: 'className', type: 'string', example: 'car')]
+        private string $className
     ) {
 
     }
@@ -36,4 +38,11 @@ public function getId(): int
     {
         return $this->id;
     }
+
+    public function getClassName(): string
+    {
+        return $this->className;
+    }
+
+
 }
diff --git a/src/Dto/Filter/DataObjectParameters.php b/src/Dto/Filter/DataObjectParameters.php
new file mode 100644
index 000000000..6b3b2453f
--- /dev/null
+++ b/src/Dto/Filter/DataObjectParameters.php
@@ -0,0 +1,48 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Dto\Filter;
+
+final readonly class DataObjectParameters extends Parameters implements DataObjectParametersInterface
+{
+    public function __construct(
+        int $page = 1,
+        int $pageSize = 10,
+        ?int $parentId = null,
+        ?string $idSearchTerm = null,
+        ?string $excludeFolders = null,
+        ?string $path = null,
+        ?string $pathIncludeParent = null,
+        ?string $pathIncludeDescendants = null,
+        private ?string $classId = null
+    ) {
+        parent::__construct(
+            $page,
+            $pageSize,
+            $parentId,
+            $idSearchTerm,
+            $excludeFolders,
+            $path,
+            $pathIncludeParent,
+            $pathIncludeDescendants
+        );
+    }
+
+    public function getClassId(): ?string
+    {
+        return $this->classId;
+    }
+}
\ No newline at end of file
diff --git a/src/Dto/Filter/DataObjectParametersInterface.php b/src/Dto/Filter/DataObjectParametersInterface.php
new file mode 100644
index 000000000..b2dd3f06f
--- /dev/null
+++ b/src/Dto/Filter/DataObjectParametersInterface.php
@@ -0,0 +1,22 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Dto\Filter;
+
+interface DataObjectParametersInterface extends ParametersInterface
+{
+    public function getClassId(): ?string;
+}
\ No newline at end of file
diff --git a/src/Dto/Collection.php b/src/Dto/Filter/Parameters.php
similarity index 94%
rename from src/Dto/Collection.php
rename to src/Dto/Filter/Parameters.php
index 39f67218f..6946c253f 100644
--- a/src/Dto/Collection.php
+++ b/src/Dto/Filter/Parameters.php
@@ -14,11 +14,11 @@
  *  @license    http://www.pimcore.org/license     GPLv3 and PCL
  */
 
-namespace Pimcore\Bundle\StudioApiBundle\Dto;
+namespace Pimcore\Bundle\StudioApiBundle\Dto\Filter;
 
 use Symfony\Component\Validator\Constraints\NotBlank;
 
-final readonly class Collection
+readonly class Parameters implements ParametersInterface
 {
     public function __construct(
         #[NotBlank]
diff --git a/src/Dto/Filter/ParametersInterface.php b/src/Dto/Filter/ParametersInterface.php
new file mode 100644
index 000000000..b3ac7790e
--- /dev/null
+++ b/src/Dto/Filter/ParametersInterface.php
@@ -0,0 +1,35 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Dto\Filter;
+
+interface ParametersInterface
+{
+    public function getPage(): int;
+
+    public function getPageSize(): int;
+
+    public function getParentId(): ?int;
+
+    public function getIdSearchTerm(): ?string;
+    public function getExcludeFolders(): ?bool;
+
+    public function getPath(): ?string;
+
+    public function getPathIncludeParent(): ?bool;
+
+    public function getPathIncludeDescendants(): ?bool;
+}
\ No newline at end of file
diff --git a/src/Filter/DataObject/ClassIdFilter.php b/src/Filter/DataObject/ClassIdFilter.php
new file mode 100644
index 000000000..a20e895a6
--- /dev/null
+++ b/src/Filter/DataObject/ClassIdFilter.php
@@ -0,0 +1,39 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Filter\DataObject;
+
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\DataObjectParametersInterface;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
+use Pimcore\Bundle\StudioApiBundle\Filter\FilterInterface;
+use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\DataObjectQuery;
+use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
+
+final class ClassIdFilter implements FilterInterface
+{
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
+    {
+        if(
+            !$parameters instanceof DataObjectParametersInterface ||
+            !$query instanceof DataObjectQuery ||
+            !$parameters->getClassId()
+        ) {
+            return $query;
+        }
+
+        return $query->setClassDefinitionId($parameters->getClassId());
+    }
+}
diff --git a/src/Filter/ExcludeFolderFilter.php b/src/Filter/ExcludeFolderFilter.php
index d6b3421ad..7b18323e5 100644
--- a/src/Filter/ExcludeFolderFilter.php
+++ b/src/Filter/ExcludeFolderFilter.php
@@ -16,14 +16,15 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class ExcludeFolderFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        $excludeFolders = $collection->getExcludeFolders();
+        $excludeFolders = $parameters->getExcludeFolders();
         if(!$excludeFolders) {
             return $query;
         }
diff --git a/src/Filter/FilterInterface.php b/src/Filter/FilterInterface.php
index 03d4888eb..5fb720b96 100644
--- a/src/Filter/FilterInterface.php
+++ b/src/Filter/FilterInterface.php
@@ -16,10 +16,11 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 interface FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface;
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface;
 }
diff --git a/src/Filter/IdSearchFilter.php b/src/Filter/IdSearchFilter.php
index 0fa475f06..90760fe9e 100644
--- a/src/Filter/IdSearchFilter.php
+++ b/src/Filter/IdSearchFilter.php
@@ -16,14 +16,15 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class IdSearchFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        $idSearchTerm = $collection->getIdSearchTerm();
+        $idSearchTerm = $parameters->getIdSearchTerm();
 
         if(!$idSearchTerm) {
             return $query;
diff --git a/src/Filter/PageFilter.php b/src/Filter/PageFilter.php
index ef1afaa35..79c5e3c9f 100644
--- a/src/Filter/PageFilter.php
+++ b/src/Filter/PageFilter.php
@@ -16,13 +16,14 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class PageFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        return $query->setPage($collection->getPage());
+        return $query->setPage($parameters->getPage());
     }
 }
diff --git a/src/Filter/PageSizeFilter.php b/src/Filter/PageSizeFilter.php
index 9b9753515..71acf271b 100644
--- a/src/Filter/PageSizeFilter.php
+++ b/src/Filter/PageSizeFilter.php
@@ -16,13 +16,14 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class PageSizeFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        return $query->setPageSize($collection->getPageSize());
+        return $query->setPageSize($parameters->getPageSize());
     }
 }
diff --git a/src/Filter/ParentIdFilter.php b/src/Filter/ParentIdFilter.php
index fe4c40c69..8a0016e61 100644
--- a/src/Filter/ParentIdFilter.php
+++ b/src/Filter/ParentIdFilter.php
@@ -16,14 +16,15 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class ParentIdFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        $parentId = $collection->getParentId();
+        $parentId = $parameters->getParentId();
 
         if(!$parentId) {
             return $query;
diff --git a/src/Filter/PathFilter.php b/src/Filter/PathFilter.php
index c8c2138dd..eeefe8551 100644
--- a/src/Filter/PathFilter.php
+++ b/src/Filter/PathFilter.php
@@ -16,16 +16,17 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\ParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
 final class PathFilter implements FilterInterface
 {
-    public function apply(Collection $collection, QueryInterface $query): QueryInterface
+    public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
-        $path = $collection->getPath();
-        $includeParent = $collection->getPathIncludeParent();
-        $includeDescendants = $collection->getPathIncludeDescendants();
+        $path = $parameters->getPath();
+        $includeParent = $parameters->getPathIncludeParent();
+        $includeDescendants = $parameters->getPathIncludeDescendants();
 
         if (!$path) {
             return $query;
diff --git a/src/Service/Filter/FilterService.php b/src/Service/Filter/FilterService.php
index 33d32c3ee..ec6c176b6 100644
--- a/src/Service/Filter/FilterService.php
+++ b/src/Service/Filter/FilterService.php
@@ -16,7 +16,7 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Service\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
 use Pimcore\Bundle\StudioApiBundle\Exception\InvalidQueryTypeException;
 use Pimcore\Bundle\StudioApiBundle\Factory\QueryFactoryInterface;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
@@ -32,7 +32,7 @@ public function __construct(
     /**
      * @throws InvalidQueryTypeException
      */
-    public function applyCollectionFilter(Collection $collection, string $type): QueryInterface
+    public function applyCollectionFilter(Parameters $collection, string $type): QueryInterface
     {
         $query = $this->queryFactory->create($type);
         foreach ($this->filterLoader->loadFilters() as $filter) {
diff --git a/src/Service/Filter/FilterServiceInterface.php b/src/Service/Filter/FilterServiceInterface.php
index cb0339592..b42b32a5c 100644
--- a/src/Service/Filter/FilterServiceInterface.php
+++ b/src/Service/Filter/FilterServiceInterface.php
@@ -16,7 +16,7 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Service\Filter;
 
-use Pimcore\Bundle\StudioApiBundle\Dto\Collection;
+use Pimcore\Bundle\StudioApiBundle\Dto\Filter\Parameters;
 use Pimcore\Bundle\StudioApiBundle\Exception\InvalidQueryTypeException;
 use Pimcore\Bundle\StudioApiBundle\Service\GenericData\V1\QueryInterface;
 
@@ -25,5 +25,5 @@ interface FilterServiceInterface
     /**
      * @throws InvalidQueryTypeException
      */
-    public function applyCollectionFilter(Collection $collection, string $type): QueryInterface;
+    public function applyCollectionFilter(Parameters $collection, string $type): QueryInterface;
 }
diff --git a/src/Service/GenericData/V1/DataObjectSearchAdapter.php b/src/Service/GenericData/V1/DataObjectSearchAdapter.php
index d86034280..7b5042f32 100644
--- a/src/Service/GenericData/V1/DataObjectSearchAdapter.php
+++ b/src/Service/GenericData/V1/DataObjectSearchAdapter.php
@@ -34,10 +34,14 @@ public function __construct(
     public function searchDataObjects(DataObjectQuery $dataObjectQuery): DataObjectSearchResult
     {
         $searchResult = $this->searchService->search($dataObjectQuery->getSearch());
-        $result = array_map(
-            static fn (int $id) => new DataObject($id),
-            $searchResult->getIds()
-        );
+
+        foreach($searchResult->getIds() as $id) {
+            $dataObject = $this->getDataObjectById($id);
+            if (!$dataObject) {
+                continue;
+            }
+            $result[] = new DataObject($dataObject->getId(), $dataObject->getClassName());
+        }
 
         return new DataObjectSearchResult(
             $result,