cpp/src/gandiva/date_utils.h

// Licensed to the Apache Software Foundation (ASF) under one
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// to you under the Apache License, Version 2.0 (the
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// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// software distributed under the License is distributed on an
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#pragma once

#include <memory>
#include <string>
#include <unordered_map>
#include <vector>

#include "arrow/util/macros.h"

#include "gandiva/arrow.h"
#include "gandiva/visibility.h"

namespace gandiva {

/// \brief Utility class for converting sql date patterns to internal date patterns.
class GANDIVA_EXPORT DateUtils {
 public:
  static Status ToInternalFormat(const std::string& format,
                                 std::shared_ptr<std::string>* internal_format);

 private:
  using date_format_converter = std::unordered_map<std::string, std::string>;

  static date_format_converter sql_date_format_to_boost_map_;

  static date_format_converter InitMap();

  static std::vector<std::string> GetMatches(std::string pattern, bool exactMatch);

  static std::vector<std::string> GetPotentialMatches(const std::string& pattern);

  static std::vector<std::string> GetExactMatches(const std::string& pattern);
};

}  // namespace gandiva