cpp/src/gandiva/like_holder.h

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// to you under the Apache License, Version 2.0 (the
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#ifndef GANDIVA_LIKE_HOLDER_H
#define GANDIVA_LIKE_HOLDER_H

#include <memory>
#include <string>

#include <re2/re2.h>

#include "arrow/status.h"

#include "gandiva/function_holder.h"
#include "gandiva/node.h"
#include "gandiva/visibility.h"

namespace gandiva {

/// Function Holder for SQL 'like'
class GANDIVA_EXPORT LikeHolder : public FunctionHolder {
 public:
  ~LikeHolder() override = default;

  static Status Make(const FunctionNode& node, std::shared_ptr<LikeHolder>* holder);

  static Status Make(const std::string& sql_pattern, std::shared_ptr<LikeHolder>* holder);

  // Try and optimise a function node with a "like" pattern.
  static const FunctionNode TryOptimize(const FunctionNode& node);

  /// Return true if the data matches the pattern.
  bool operator()(const std::string& data) { return RE2::FullMatch(data, regex_); }

 private:
  explicit LikeHolder(const std::string& pattern) : pattern_(pattern), regex_(pattern) {}

  std::string pattern_;  // posix pattern string, to help debugging
  RE2 regex_;            // compiled regex for the pattern

  static RE2 starts_with_regex_;  // pre-compiled pattern for matching starts_with
  static RE2 ends_with_regex_;    // pre-compiled pattern for matching ends_with
};

}  // namespace gandiva

#endif  // GANDIVA_LIKE_HOLDER_H