src/compiler/schema_interface.h

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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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#ifndef GRPC_INTERNAL_COMPILER_SCHEMA_INTERFACE_H
#define GRPC_INTERNAL_COMPILER_SCHEMA_INTERFACE_H

#include "src/compiler/config.h"

#include <memory>
#include <vector>

#ifndef GRPC_CUSTOM_STRING
#include <string>
#define GRPC_CUSTOM_STRING std::string
#endif

namespace grpc {

typedef GRPC_CUSTOM_STRING string;

}  // namespace grpc

namespace grpc_generator {

// A common interface for objects having comments in the source.
// Return formatted comments to be inserted in generated code.
struct CommentHolder {
  virtual ~CommentHolder() {}
  virtual grpc::string GetLeadingComments(const grpc::string prefix) const = 0;
  virtual grpc::string GetTrailingComments(const grpc::string prefix) const = 0;
  virtual std::vector<grpc::string> GetAllComments() const = 0;
};

// An abstract interface representing a method.
struct Method : public CommentHolder {
  virtual ~Method() {}

  virtual grpc::string name() const = 0;

  virtual grpc::string input_type_name() const = 0;
  virtual grpc::string output_type_name() const = 0;

  virtual bool get_module_and_message_path_input(
      grpc::string *str, grpc::string generator_file_name,
      bool generate_in_pb2_grpc, grpc::string import_prefix) const = 0;
  virtual bool get_module_and_message_path_output(
      grpc::string *str, grpc::string generator_file_name,
      bool generate_in_pb2_grpc, grpc::string import_prefix) const = 0;

  virtual grpc::string get_input_type_name() const = 0;
  virtual grpc::string get_output_type_name() const = 0;
  virtual bool NoStreaming() const = 0;
  virtual bool ClientStreaming() const = 0;
  virtual bool ServerStreaming() const = 0;
  virtual bool BidiStreaming() const = 0;
};

// An abstract interface representing a service.
struct Service : public CommentHolder {
  virtual ~Service() {}

  virtual grpc::string name() const = 0;

  virtual int method_count() const = 0;
  virtual std::unique_ptr<const Method> method(int i) const = 0;
};

struct Printer {
  virtual ~Printer() {}

  virtual void Print(const std::map<grpc::string, grpc::string> &vars,
                     const char *template_string) = 0;
  virtual void Print(const char *string) = 0;
  virtual void Indent() = 0;
  virtual void Outdent() = 0;
};

// An interface that allows the source generated to be output using various
// libraries/idls/serializers.
struct File : public CommentHolder {
  virtual ~File() {}

  virtual grpc::string filename() const = 0;
  virtual grpc::string filename_without_ext() const = 0;
  virtual grpc::string package() const = 0;
  virtual std::vector<grpc::string> package_parts() const = 0;
  virtual grpc::string additional_headers() const = 0;

  virtual int service_count() const = 0;
  virtual std::unique_ptr<const Service> service(int i) const = 0;

  virtual std::unique_ptr<Printer> CreatePrinter(grpc::string *str) const = 0;
};
}  // namespace grpc_generator

#endif  // GRPC_INTERNAL_COMPILER_SCHEMA_INTERFACE_H