From b6d19ae0d186a0389b65c41d059f5116e6a58b5e Mon Sep 17 00:00:00 2001
From: Marcel Koch <marcel.koch@kit.edu>
Date: Mon, 3 Feb 2025 10:09:54 +0000
Subject: [PATCH] [wip] apply interface

---
 .../batched/backend/batch_user_operator.hpp   | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 examples/batched-matrix-free-templated/batched/backend/batch_user_operator.hpp

diff --git a/examples/batched-matrix-free-templated/batched/backend/batch_user_operator.hpp b/examples/batched-matrix-free-templated/batched/backend/batch_user_operator.hpp
new file mode 100644
index 00000000000..bfee86585a6
--- /dev/null
+++ b/examples/batched-matrix-free-templated/batched/backend/batch_user_operator.hpp
@@ -0,0 +1,30 @@
+// SPDX-FileCopyrightText: 2025 The Ginkgo authors
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#pragma once
+
+#include <ginkgo/core/base/batch_lin_op.hpp>
+
+
+namespace gko::batch_template {
+
+template <typename Concrete>
+class EnableBatchUserLinOp : public batch::BatchLinOp {
+public:
+    using value_type = typename Concrete::value_type;
+
+    void apply(ptr_param<const batch::MultiVector<value_type>> b,
+               ptr_param<batch::MultiVector<value_type>> x) const
+    {
+        this->validate_application_parameters(b.get(), x.get());
+        auto exec = self()->get_executor();
+        this->template log<log::Logger::batch_solver_completed>(
+            log_data_->iter_counts, log_data_->res_norms);
+    }
+
+private:
+    GKO_ENABLE_SELF(Concrete);
+};
+
+}  // namespace gko::batch_template