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diff --git a/src/core/expression/RBALogicalOperator.hpp b/src/core/expression/RBALogicalOperator.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.
+ */
+
+/**
+ * LogicalOperator class header
+ */
+
+#ifndef RBALOGICOPERATOR_HPP
+#define RBALOGICOPERATOR_HPP
+
+#include "RBAOperator.hpp"
+
+namespace rba
+{
+
+class DLL_EXPORT RBALogicalOperator : public RBAOperator
+{
+ protected:
+  RBALogicalOperator()=default;
+  RBALogicalOperator(const RBALogicalOperator&)=delete;
+  RBALogicalOperator(const RBALogicalOperator&&)=delete;
+  RBALogicalOperator& operator=(const RBALogicalOperator&)=delete;
+  RBALogicalOperator& operator=(const RBALogicalOperator&&)=delete;
+
+ public:
+  // Log
+#ifdef RBA_USE_LOG
+  const std::string getExpressionText() const override;
+  const std::string getCoverageExpressionText() const override;
+  RBAExpressionType getUnderlyingType() const override;
+#endif
+
+};
+
+}
+
+#endif