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diff --git a/tests/tools/onert_train/src/rawdataloader.h b/tests/tools/onert_train/src/rawdataloader.h
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+/*
+ * Copyright (c) 2023 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ONERT_TRAIN_RAWDATALOADER_H__
+#define __ONERT_TRAIN_RAWDATALOADER_H__
+
+#include "allocation.h"
+#include "nnfw.h"
+
+#include <functional>
+#include <string>
+#include <vector>
+#include <fstream>
+
+namespace onert_train
+{
+
+using Generator = std::function<bool(uint32_t,                  /** index **/
+                                     std::vector<Allocation> &, /** input **/
+                                     std::vector<Allocation> & /** expected **/)>;
+
+class RawDataLoader
+{
+public:
+  RawDataLoader() = default;
+  Generator loadData(const std::string &input_file, const std::string &expected_file,
+                     const std::vector<nnfw_tensorinfo> &input_infos,
+                     const std::vector<nnfw_tensorinfo> &output_infos, const uint32_t data_length,
+                     const uint32_t batch_size);
+
+private:
+  std::ifstream _input_file;
+  std::ifstream _expected_file;
+};
+
+} // namespace onert_train
+
+#endif // __ONERT_TRAIN_RAWDATALOADER_H__