// Protocol Buffers - Google's data interchange format
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// https://developers.google.com/protocol-buffers/
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#ifndef GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_EXTENSION_H__
#define GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_EXTENSION_H__

#include <string>

#include "absl/container/btree_set.h"
#include "google/protobuf/descriptor.h"
#include "google/protobuf/io/printer.h"

namespace google {
namespace protobuf {
namespace compiler {
namespace objectivec {

class ExtensionGenerator {
 public:
  ExtensionGenerator(const std::string& root_class_name,
                     const FieldDescriptor* descriptor);
  ~ExtensionGenerator() = default;

  ExtensionGenerator(const ExtensionGenerator&) = delete;
  ExtensionGenerator& operator=(const ExtensionGenerator&) = delete;

  void GenerateMembersHeader(io::Printer* printer) const;
  void GenerateStaticVariablesInitialization(io::Printer* printer) const;
  void GenerateRegistrationSource(io::Printer* printer) const;
  void DetermineObjectiveCClassDefinitions(
      absl::btree_set<std::string>* fwd_decls) const;

 private:
  std::string method_name_;
  std::string root_class_and_method_name_;
  const FieldDescriptor* descriptor_;
};

}  // namespace objectivec
}  // namespace compiler
}  // namespace protobuf
}  // namespace google

#endif  // GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_MESSAGE_H__