246 lines
8.0 KiB
Protocol Buffer
246 lines
8.0 KiB
Protocol Buffer
// 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;
|
|
|
|
option csharp_namespace = "Google.Protobuf.WellKnownTypes";
|
|
option java_package = "com.google.protobuf";
|
|
option java_outer_classname = "FieldMaskProto";
|
|
option java_multiple_files = true;
|
|
option objc_class_prefix = "GPB";
|
|
option go_package = "google.golang.org/protobuf/types/known/fieldmaskpb";
|
|
option cc_enable_arenas = true;
|
|
|
|
// `FieldMask` represents a set of symbolic field paths, for example:
|
|
//
|
|
// paths: "f.a"
|
|
// paths: "f.b.d"
|
|
//
|
|
// Here `f` represents a field in some root message, `a` and `b`
|
|
// fields in the message found in `f`, and `d` a field found in the
|
|
// message in `f.b`.
|
|
//
|
|
// Field masks are used to specify a subset of fields that should be
|
|
// returned by a get operation or modified by an update operation.
|
|
// Field masks also have a custom JSON encoding (see below).
|
|
//
|
|
// # Field Masks in Projections
|
|
//
|
|
// When used in the context of a projection, a response message or
|
|
// sub-message is filtered by the API to only contain those fields as
|
|
// specified in the mask. For example, if the mask in the previous
|
|
// example is applied to a response message as follows:
|
|
//
|
|
// f {
|
|
// a : 22
|
|
// b {
|
|
// d : 1
|
|
// x : 2
|
|
// }
|
|
// y : 13
|
|
// }
|
|
// z: 8
|
|
//
|
|
// The result will not contain specific values for fields x,y and z
|
|
// (their value will be set to the default, and omitted in proto text
|
|
// output):
|
|
//
|
|
//
|
|
// f {
|
|
// a : 22
|
|
// b {
|
|
// d : 1
|
|
// }
|
|
// }
|
|
//
|
|
// A repeated field is not allowed except at the last position of a
|
|
// paths string.
|
|
//
|
|
// If a FieldMask object is not present in a get operation, the
|
|
// operation applies to all fields (as if a FieldMask of all fields
|
|
// had been specified).
|
|
//
|
|
// Note that a field mask does not necessarily apply to the
|
|
// top-level response message. In case of a REST get operation, the
|
|
// field mask applies directly to the response, but in case of a REST
|
|
// list operation, the mask instead applies to each individual message
|
|
// in the returned resource list. In case of a REST custom method,
|
|
// other definitions may be used. Where the mask applies will be
|
|
// clearly documented together with its declaration in the API. In
|
|
// any case, the effect on the returned resource/resources is required
|
|
// behavior for APIs.
|
|
//
|
|
// # Field Masks in Update Operations
|
|
//
|
|
// A field mask in update operations specifies which fields of the
|
|
// targeted resource are going to be updated. The API is required
|
|
// to only change the values of the fields as specified in the mask
|
|
// and leave the others untouched. If a resource is passed in to
|
|
// describe the updated values, the API ignores the values of all
|
|
// fields not covered by the mask.
|
|
//
|
|
// If a repeated field is specified for an update operation, new values will
|
|
// be appended to the existing repeated field in the target resource. Note that
|
|
// a repeated field is only allowed in the last position of a `paths` string.
|
|
//
|
|
// If a sub-message is specified in the last position of the field mask for an
|
|
// update operation, then new value will be merged into the existing sub-message
|
|
// in the target resource.
|
|
//
|
|
// For example, given the target message:
|
|
//
|
|
// f {
|
|
// b {
|
|
// d: 1
|
|
// x: 2
|
|
// }
|
|
// c: [1]
|
|
// }
|
|
//
|
|
// And an update message:
|
|
//
|
|
// f {
|
|
// b {
|
|
// d: 10
|
|
// }
|
|
// c: [2]
|
|
// }
|
|
//
|
|
// then if the field mask is:
|
|
//
|
|
// paths: ["f.b", "f.c"]
|
|
//
|
|
// then the result will be:
|
|
//
|
|
// f {
|
|
// b {
|
|
// d: 10
|
|
// x: 2
|
|
// }
|
|
// c: [1, 2]
|
|
// }
|
|
//
|
|
// An implementation may provide options to override this default behavior for
|
|
// repeated and message fields.
|
|
//
|
|
// In order to reset a field's value to the default, the field must
|
|
// be in the mask and set to the default value in the provided resource.
|
|
// Hence, in order to reset all fields of a resource, provide a default
|
|
// instance of the resource and set all fields in the mask, or do
|
|
// not provide a mask as described below.
|
|
//
|
|
// If a field mask is not present on update, the operation applies to
|
|
// all fields (as if a field mask of all fields has been specified).
|
|
// Note that in the presence of schema evolution, this may mean that
|
|
// fields the client does not know and has therefore not filled into
|
|
// the request will be reset to their default. If this is unwanted
|
|
// behavior, a specific service may require a client to always specify
|
|
// a field mask, producing an error if not.
|
|
//
|
|
// As with get operations, the location of the resource which
|
|
// describes the updated values in the request message depends on the
|
|
// operation kind. In any case, the effect of the field mask is
|
|
// required to be honored by the API.
|
|
//
|
|
// ## Considerations for HTTP REST
|
|
//
|
|
// The HTTP kind of an update operation which uses a field mask must
|
|
// be set to PATCH instead of PUT in order to satisfy HTTP semantics
|
|
// (PUT must only be used for full updates).
|
|
//
|
|
// # JSON Encoding of Field Masks
|
|
//
|
|
// In JSON, a field mask is encoded as a single string where paths are
|
|
// separated by a comma. Fields name in each path are converted
|
|
// to/from lower-camel naming conventions.
|
|
//
|
|
// As an example, consider the following message declarations:
|
|
//
|
|
// message Profile {
|
|
// User user = 1;
|
|
// Photo photo = 2;
|
|
// }
|
|
// message User {
|
|
// string display_name = 1;
|
|
// string address = 2;
|
|
// }
|
|
//
|
|
// In proto a field mask for `Profile` may look as such:
|
|
//
|
|
// mask {
|
|
// paths: "user.display_name"
|
|
// paths: "photo"
|
|
// }
|
|
//
|
|
// In JSON, the same mask is represented as below:
|
|
//
|
|
// {
|
|
// mask: "user.displayName,photo"
|
|
// }
|
|
//
|
|
// # Field Masks and Oneof Fields
|
|
//
|
|
// Field masks treat fields in oneofs just as regular fields. Consider the
|
|
// following message:
|
|
//
|
|
// message SampleMessage {
|
|
// oneof test_oneof {
|
|
// string name = 4;
|
|
// SubMessage sub_message = 9;
|
|
// }
|
|
// }
|
|
//
|
|
// The field mask can be:
|
|
//
|
|
// mask {
|
|
// paths: "name"
|
|
// }
|
|
//
|
|
// Or:
|
|
//
|
|
// mask {
|
|
// paths: "sub_message"
|
|
// }
|
|
//
|
|
// Note that oneof type names ("test_oneof" in this case) cannot be used in
|
|
// paths.
|
|
//
|
|
// ## Field Mask Verification
|
|
//
|
|
// The implementation of any API method which has a FieldMask type field in the
|
|
// request should verify the included field paths, and return an
|
|
// `INVALID_ARGUMENT` error if any path is unmappable.
|
|
message FieldMask {
|
|
// The set of field mask paths.
|
|
repeated string paths = 1;
|
|
}
|