// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google Inc.  All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd

syntax = "proto2";

package pb;

import "google/protobuf/descriptor.proto";

option java_package = "com.google.protobuf";
option java_outer_classname = "JavaFeaturesProto";

extend google.protobuf.FeatureSet {
  optional JavaFeatures java = 1001;
}

message JavaFeatures {
  // Whether or not to treat an enum field as closed.  This option is only
  // applicable to enum fields, and will be removed in the future.  It is
  // consistent with the legacy behavior of using proto3 enum types for proto2
  // fields.
  optional bool legacy_closed_enum = 1 [
    retention = RETENTION_RUNTIME,
    targets = TARGET_TYPE_FIELD,
    targets = TARGET_TYPE_FILE,
    // TODO Enable this in google3 once protoc rolls out.
    feature_support = {
      edition_introduced: EDITION_2023,
      edition_deprecated: EDITION_2023,
      deprecation_warning: "The legacy closed enum treatment in Java is "
                           "deprecated and is scheduled to be removed in "
                           "edition 2025.  Mark enum type on the enum "
                           "definitions themselves rather than on fields.",
    },
    edition_defaults = { edition: EDITION_PROTO2, value: "true" },
    edition_defaults = { edition: EDITION_PROTO3, value: "false" }
  ];

  // The UTF8 validation strategy to use.  See go/editions-utf8-validation for
  // more information on this feature.
  enum Utf8Validation {
    // Invalid default, which should never be used.
    UTF8_VALIDATION_UNKNOWN = 0;
    // Respect the UTF8 validation behavior specified by the global
    // utf8_validation feature.
    DEFAULT = 1;
    // Verifies UTF8 validity overriding the global utf8_validation
    // feature. This represents the legacy java_string_check_utf8 option.
    VERIFY = 2;
  }
  optional Utf8Validation utf8_validation = 2 [
    retention = RETENTION_RUNTIME,
    targets = TARGET_TYPE_FIELD,
    targets = TARGET_TYPE_FILE,
    // TODO Enable this in google3 once protoc rolls out.
    feature_support = {
      edition_introduced: EDITION_2023,
      edition_deprecated: EDITION_2024,
      deprecation_warning: "The Java-specific utf8 validation feature is "
                           "deprecated and is scheduled to be removed in "
                           "edition 2025.  Utf8 validation behavior should "
                           "use the global cross-language utf8_validation "
                           "feature.",
    },
    edition_defaults = { edition: EDITION_PROTO2, value: "DEFAULT" }
  ];
}
