Foo foo = ...; Any any; any.PackFrom(foo); ... if (any.UnpackTo(&foo)) { ... }
GET /v1/metadata
Code | Message | Datatype |
---|---|---|
200 |
A successful response. |
|
0 |
An unexpected error response. |
Field Name | Required | Nullable | Type | Description | Format |
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code |
Integer |
int32 |
|||
message |
String |
||||
details |
List of ProtobufAny |
Any
contains an arbitrary serialized protocol buffer message along with a
URL that describes the type of the serialized message.
Protobuf library provides support to pack/unpack Any values in the form of utility functions or additional generated methods of the Any type.
Example 1: Pack and unpack a message in C++.
Foo foo = ...; Any any; any.PackFrom(foo); ... if (any.UnpackTo(&foo)) { ... }
Example 2: Pack and unpack a message in Java.
Foo foo = ...; Any any = Any.pack(foo); ... if (any.is(Foo.class)) { foo = any.unpack(Foo.class); } // or ... if (any.isSameTypeAs(Foo.getDefaultInstance())) { foo = any.unpack(Foo.getDefaultInstance()); }
Example 3: Pack and unpack a message in Python.
foo = Foo(...) any = Any() any.Pack(foo) ... if any.Is(Foo.DESCRIPTOR): any.Unpack(foo) ...
Example 4: Pack and unpack a message in Go
foo := &pb.Foo{...} any, err := anypb.New(foo) if err != nil { ... } ... foo := &pb.Foo{} if err := any.UnmarshalTo(foo); err != nil { ... }
The pack methods provided by protobuf library will by default use 'type.googleapis.com/full.type.name' as the type URL and the unpack methods only use the fully qualified type name after the last '/' in the type URL, for example "foo.bar.com/x/y.z" will yield type name "y.z".
The JSON representation of an Any
value uses the regular
representation of the deserialized, embedded message, with an
additional field @type
which contains the type URL. Example:
package google.profile; message Person { string first_name = 1; string last_name = 2; }
{ "@type": "type.googleapis.com/google.profile.Person", "firstName": <string>, "lastName": <string> }
If the embedded message type is well-known and has a custom JSON
representation, that representation will be embedded adding a field
value
which holds the custom JSON in addition to the @type
field. Example (for message [google.protobuf.Duration][]):
{ "@type": "type.googleapis.com/google.protobuf.Duration", "value": "1.212s" }
Field Name | Required | Nullable | Type | Description | Format |
---|---|---|---|---|---|
@type |
String |
A URL/resource name that uniquely identifies the type of the serialized protocol buffer message. This string must contain at least one \"/\" character. The last segment of the URL’s path must represent the fully qualified name of the type (as in |