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diff --git a/src/factory/RBAJsonElement.hpp b/src/factory/RBAJsonElement.hpp
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+/**
+ * Copyright (c) 2019 DENSO CORPORATION.
+ * 
+ * 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.
+ */
+
+/// @file  RBAJsonElement.hpp
+/// @brief JSON element class header file
+
+#ifndef RBAJSONELEMENT_HPP
+#define RBAJSONELEMENT_HPP
+
+#include <cstdint>
+#include <vector>
+#include <memory>
+#include <string>
+#include "RBADllExport.hpp"
+
+namespace rba
+{
+
+enum class RBAArbitrationPolicy : std::uint8_t;
+enum class RBAContentLoserType : std::uint8_t;
+#ifdef RBA_USE_LOG
+enum class RBAExpressionType : std::uint8_t;
+#endif
+
+/// @brief JSONエ Element class
+class DLL_EXPORT RBAJsonElement
+{
+public:
+  RBAJsonElement()=default;
+  RBAJsonElement(const RBAJsonElement&)=delete;
+  RBAJsonElement(const RBAJsonElement&&)=delete;
+  RBAJsonElement& operator=(const RBAJsonElement&)=delete;
+  RBAJsonElement& operator=(const RBAJsonElement&&)=delete;
+  virtual ~RBAJsonElement()=default;
+
+public:
+  virtual const std::string& getString() const;
+  virtual std::int32_t getInt() const;
+  virtual RBAArbitrationPolicy getArbitrationPolicy() const;
+  virtual RBAContentLoserType getLoserType() const;
+#ifdef RBA_USE_LOG
+  virtual RBAExpressionType getExpressionType() const;
+#endif
+
+  void setName(const std::string& name);
+  const std::string& getName() const;
+  void addChild(std::unique_ptr<RBAJsonElement> child);
+  const std::vector<std::unique_ptr<RBAJsonElement>>& getChildren() const;
+  RBAJsonElement* getChild() const;
+  const RBAJsonElement* findChildren(const std::string& name) const;
+  const std::string& getClassName() const;
+
+private:
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4251)
+#endif
+  std::string name_ {""};
+  std::vector<std::unique_ptr<RBAJsonElement>> children_;
+  static std::string emptyStr_;
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+};
+
+class RBAJsonElementElement : public RBAJsonElement
+{
+public:
+  explicit RBAJsonElementElement(const std::string& name);
+  RBAJsonElementElement(const RBAJsonElementElement&)=delete;
+  RBAJsonElementElement(const RBAJsonElementElement&&)=delete;
+  RBAJsonElementElement& operator=(const RBAJsonElementElement&)=delete;
+  RBAJsonElementElement& operator=(const RBAJsonElementElement&&)=delete;
+  virtual ~RBAJsonElementElement()=default;
+};
+
+class RBAJsonElementString : public RBAJsonElement
+{
+public:
+  explicit RBAJsonElementString(const std::string& name);
+  RBAJsonElementString(const RBAJsonElementString&)=delete;
+  RBAJsonElementString(const RBAJsonElementString&&)=delete;
+  RBAJsonElementString& operator=(const RBAJsonElementString&)=delete;
+  RBAJsonElementString& operator=(const RBAJsonElementString&&)=delete;
+  virtual ~RBAJsonElementString()=default;
+
+public:
+  RBAArbitrationPolicy getArbitrationPolicy() const override;
+  RBAContentLoserType getLoserType() const override;
+#ifdef RBA_USE_LOG
+  RBAExpressionType getExpressionType() const override;
+#endif
+
+  const std::string& getString() const override;
+  void setString(const std::string& str);
+
+private:
+  std::string str_ {""};
+
+};
+
+class RBAJsonElementInt : public RBAJsonElement
+{
+public:
+  explicit RBAJsonElementInt(const std::string& name);
+  RBAJsonElementInt(const RBAJsonElementInt&)=delete;
+  RBAJsonElementInt(const RBAJsonElementInt&&)=delete;
+  RBAJsonElementInt& operator=(const RBAJsonElementInt&)=delete;
+  RBAJsonElementInt& operator=(const RBAJsonElementInt&&)=delete;
+  virtual ~RBAJsonElementInt()=default;
+
+public:
+  std::int32_t getInt() const override;
+  void setInt(const std::int32_t val);
+
+private:
+  std::int32_t val_ {0};
+
+};
+
+class RBAJsonElementArray : public RBAJsonElement
+{
+public:
+  explicit RBAJsonElementArray(const std::string& name);
+  RBAJsonElementArray(const RBAJsonElementArray&)=delete;
+  RBAJsonElementArray(const RBAJsonElementArray&&)=delete;
+  RBAJsonElementArray& operator=(const RBAJsonElementArray&)=delete;
+  RBAJsonElementArray& operator=(const RBAJsonElementArray&&)=delete;
+  virtual ~RBAJsonElementArray()=default;
+};
+  
+}
+
+#endif