cpp/src/gandiva/configuration.h

// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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
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// specific language governing permissions and limitations
// under the License.

#pragma once

#include <memory>
#include <string>

#include "arrow/status.h"

#include "gandiva/visibility.h"

namespace gandiva {

class ConfigurationBuilder;
/// \brief runtime config for gandiva
///
/// It contains elements to customize gandiva execution
/// at run time.
class GANDIVA_EXPORT Configuration {
 public:
  friend class ConfigurationBuilder;

  std::size_t Hash() const;
  bool operator==(const Configuration& other) const;
  bool operator!=(const Configuration& other) const;
};

/// \brief configuration builder for gandiva
///
/// Provides a default configuration and convenience methods
/// to override specific values and build a custom instance
class GANDIVA_EXPORT ConfigurationBuilder {
 public:
  std::shared_ptr<Configuration> build() {
    std::shared_ptr<Configuration> configuration(new Configuration());
    return configuration;
  }

  static std::shared_ptr<Configuration> DefaultConfiguration() {
    return default_configuration_;
  }

 private:
  static std::shared_ptr<Configuration> InitDefaultConfig() {
    std::shared_ptr<Configuration> configuration(new Configuration());
    return configuration;
  }

  static const std::shared_ptr<Configuration> default_configuration_;
};

}  // namespace gandiva