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diff --git a/src/core/expression/RBAIfStatement.hpp b/src/core/expression/RBAIfStatement.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.
+ */
+
+/**
+ * If statement class header file
+ */
+
+#ifndef RBAIFSTATEMENT_HPP
+#define RBAIFSTATEMENT_HPP
+
+#include "RBAExpression.hpp"
+
+namespace rba
+{
+
+class DLL_EXPORT RBAIfStatement : public RBAExpression
+{
+public:
+  RBAIfStatement()=default;
+  RBAIfStatement(const RBAIfStatement&)=delete;
+  RBAIfStatement(const RBAIfStatement&&)=delete;
+  RBAIfStatement& operator=(const RBAIfStatement&)=delete;
+  RBAIfStatement& operator=(const RBAIfStatement&&)=delete;
+  virtual ~RBAIfStatement()=default;
+
+public:
+  void setCondition(RBAExpression* const expr);
+  void setThenExpression(RBAExpression* const expr);
+  void setElseExpression(RBAExpression* const expr);
+  RBAExpression* const getCondition() const;
+  RBAExpression* const getThenExpression() const;
+  RBAExpression* const getElseExpression() const;
+
+  void accept(RBAExpressionVisitor& visitor) override;
+  RBAModelElementType getModelElementType() const override;
+  bool executeCore(RBAConstraintInfo* info, RBAArbitrator* arb) const override;
+  const RBARuleObject* getReferenceObjectCore(RBAConstraintInfo* info,
+                                                      RBAArbitrator* arb) const override;
+  std::int32_t getValueCore(RBAConstraintInfo* info,
+                                    RBAArbitrator* arb) const override;
+  void doActionCore(RBAConstraintInfo* info, RBAArbitrator* arb) override;
+
+  // Log
+#ifdef RBA_USE_LOG
+  const std::string getExpressionText() const override;
+  const std::string getCoverageExpressionText() const override;
+  void createHierarchy() override;
+  RBAExpressionType getUnderlyingType() const override;
+#endif
+
+ private:
+  RBAExpression* condition_ {nullptr};
+  RBAExpression* thenExpression_ {nullptr};
+  RBAExpression* elseExpression_ {nullptr};
+
+};
+
+}
+
+#endif