src/google/protobuf/type.proto

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
syntax = "proto3";

package google.protobuf;

import "google/protobuf/any.proto";
import "google/protobuf/source_context.proto";

option java_multiple_files = true;
option java_outer_classname = "TypeProto";
option java_package = "com.google.protobuf";
option csharp_namespace = "Google.Protobuf.WellKnownTypes";
option objc_class_prefix = "GPB";


// A light-weight descriptor for a proto message type.
message Type {
  // The fully qualified message name.
  string name = 1;

  // The list of fields.
  repeated Field fields = 2;

  // The list of oneof definitions.
  // The list of oneofs declared in this Type
  repeated string oneofs = 3;

  // The proto options.
  repeated Option options = 4;

  // The source context.
  SourceContext source_context = 5;
}

// Field represents a single field of a message type.
message Field {
  // Kind represents a basic field type.
  enum Kind {
    // Field type unknown.
    TYPE_UNKNOWN = 0;

    // Field type double.
    TYPE_DOUBLE = 1;

    // Field type float.
    TYPE_FLOAT = 2;

    // Field type int64.
    TYPE_INT64 = 3;

    // Field type uint64.
    TYPE_UINT64 = 4;

    // Field type int32.
    TYPE_INT32 = 5;

    // Field type fixed64.
    TYPE_FIXED64 = 6;

    // Field type fixed32.
    TYPE_FIXED32 = 7;

    // Field type bool.
    TYPE_BOOL = 8;

    // Field type string.
    TYPE_STRING = 9;

    // Field type message.
    TYPE_MESSAGE = 11;

    // Field type bytes.
    TYPE_BYTES = 12;

    // Field type uint32.
    TYPE_UINT32 = 13;

    // Field type enum.
    TYPE_ENUM = 14;

    // Field type sfixed32.
    TYPE_SFIXED32 = 15;

    // Field type sfixed64.
    TYPE_SFIXED64 = 16;

    // Field type sint32.
    TYPE_SINT32 = 17;

    // Field type sint64.
    TYPE_SINT64 = 18;
  }

  // Cardinality represents whether a field is optional, required, or
  // repeated.
  enum Cardinality {
    // The field cardinality is unknown. Typically an error condition.
    CARDINALITY_UNKNOWN = 0;

    // For optional fields.
    CARDINALITY_OPTIONAL = 1;

    // For required fields. Not used for proto3.
    CARDINALITY_REQUIRED = 2;

    // For repeated fields.
    CARDINALITY_REPEATED = 3;
  }

  // The field kind.
  Kind kind = 1;

  // The field cardinality, i.e. optional/required/repeated.
  Cardinality cardinality = 2;

  // The proto field number.
  int32 number = 3;

  // The field name.
  string name = 4;

  // The type URL (without the scheme) when the type is MESSAGE or ENUM,
  // such as `type.googleapis.com/google.protobuf.Empty`.
  string type_url = 6;

  // Index in Type.oneofs. Starts at 1. Zero means no oneof mapping.
  int32 oneof_index = 7;

  // Whether to use alternative packed wire representation.
  bool packed = 8;

  // The proto options.
  repeated Option options = 9;
}

// Enum type definition.
message Enum {
  // Enum type name.
  string name = 1;

  // Enum value definitions.
  repeated EnumValue enumvalue = 2;

  // Proto options for the enum type.
  repeated Option options = 3;

  // The source context.
  SourceContext source_context = 4;
}

// Enum value definition.
message EnumValue {
  // Enum value name.
  string name = 1;

  // Enum value number.
  int32 number = 2;

  // Proto options for the enum value.
  repeated Option options = 3;
}

// Proto option attached to messages/fields/enums etc.
message Option {
  // Proto option name.
  string name = 1;

  // Proto option value.
  Any value = 2;
}