// Copyright (c) 2015, Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// This file contains annotation definitions that can be used to describe
// a configuration tree.

syntax = "proto3";

option go_package = "github.com/opencord/voltha-protos/go/common";

package voltha;

import "google/protobuf/descriptor.proto";

message ChildNode {
    string key = 1;
}

enum Access {

    // read-write, stored attribute
    CONFIG = 0;

    // read-only field, stored with the model, covered by its hash
    READ_ONLY = 1;

    // A read-only attribute that is not stored in the model, not covered
    // by its hash, its value is filled real-time upon each request.
    REAL_TIME = 2;

}

extend google.protobuf.FieldOptions {

    // If present, it indicates that this field is stored as external child node
    // or children nodes in Voltha's internal configuration tree.
    // If the field is a container field and if the option specifies a key
    // the child objects will be addressible by that key.
    ChildNode child_node = 7761772;

    // This annotation can be used to indicate that a field is read-only,
    // from the perspective of NBI access. Backend plugins and system
    // internals can update the field but the update requests through the
    // NBI will ignore for instance a field that is marked as read-only (RO).
    Access access = 7761773;
}