src/third_party/protobuf-3/java/core/src/test/proto/com/google/protobuf/map_test.proto

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
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syntax = "proto3";

package map_test;

option java_package = "map_test";
option java_outer_classname = "MapTestProto";
option java_generate_equals_and_hash = true;

message TestMap {
  message MessageValue {
    int32 value = 1;
  }
  enum EnumValue {
    FOO = 0;
    BAR = 1;
    BAZ = 2;
    QUX = 3;
  }

  map<int32, int32>        int32_to_int32_field = 1;
  map<int32, string>       int32_to_string_field = 2;
  map<int32, bytes>        int32_to_bytes_field = 3;
  map<int32, EnumValue>    int32_to_enum_field = 4;
  map<int32, MessageValue> int32_to_message_field = 5;
  map<string, int32>       string_to_int32_field = 6;
}

// Used to test that a nested bulider containing map fields will properly
// propagate the onChange event and mark its parent dirty when a change
// is made to a map field.
message TestOnChangeEventPropagation {
  TestMap optional_message = 1;
}