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/*
 * Copyright (c) 2018 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 __NEURUN_MODEL_OPERATION_H__
#define __NEURUN_MODEL_OPERATION_H__

#include <memory>

#include "model/Operand.h"
#include "model/OperandIndexSequence.h"
#include "model/OperandConstraint.h"

namespace neurun
{
namespace graph
{
namespace operation
{
class LowerInfo;
} // namespace operation
} // namespace graph
} // namespace neurun

namespace neurun
{
namespace model
{
struct OperationVisitor;
} // namespace model
} // namespace neurun

namespace neurun
{
namespace model
{

using OperandConstraint = ::neurun::model::operation::OperandConstraint;

class Operation
{
public:
  Operation(OperandConstraint input_constr, const OperandIndexSequence &inputs,
            const OperandIndexSequence &outputs);
  explicit Operation(OperandConstraint input_constr);

  Operation(const Operation &) = delete;
  Operation(Operation &&) = default;
  Operation &operator=(const Operation &) = delete;
  Operation &operator=(Operation &&) = default;

  virtual ~Operation();

public:
  virtual void accept(OperationVisitor &v) const = 0;
  virtual std::string getName() const = 0;

public:
  void replaceInput(const OperandIndex &from, const OperandIndex &to);
  void replaceOutput(const OperandIndex &from, const OperandIndex &to);
  const OperandIndexSequence &getInputs() const { return _inputs; }
  const OperandIndexSequence &getOutputs() const { return _outputs; }
  // It's for only input/output tensors but const data.
  void setInputs(const OperandIndexSequence &indexes);
  void setOutputs(const OperandIndexSequence &indexes);

private:
  OperandConstraint _input_constr;
  OperandIndexSequence _inputs;
  OperandIndexSequence _outputs;
};

} // namespace model
} // namespace neurun

#endif // __NEURUN_MODEL_OPERATION_H__