Abstract types

Any

static

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);
}

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 := ptypes.MarshalAny(foo)
 ...
 foo := &pb.Foo{}
 if err := ptypes.UnmarshalAny(any, 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".

JSON

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"
}

Properties

Parameter

typeUrl

string

A URL/resource name whose content describes the type of the serialized protocol buffer message.

For URLs which use the scheme http, https, or no scheme, the following restrictions and interpretations apply:

  • If no scheme is provided, https is assumed.
  • The last segment of the URL's path must represent the fully qualified name of the type (as in path/google.protobuf.Duration). The name should be in a canonical form (e.g., leading "." is not accepted).
  • An HTTP GET on the URL must yield a google.protobuf.Type value in binary format, or produce an error.
  • Applications are allowed to cache lookup results based on the URL, or have them precompiled into a binary to avoid any lookup. Therefore, binary compatibility needs to be preserved on changes to types. (Use versioned type names to manage breaking changes.)

    Schemes other than http, https (or the empty scheme) might be used with implementation specific semantics.

value

string

Must be a valid serialized protocol buffer of the above specified type.

See also

google.protobuf.Any definition in proto format

BoolValue

static

Wrapper message for bool.

The JSON representation for BoolValue is JSON true and false.

Property

Parameter

value

boolean

The bool value.

See also

google.protobuf.BoolValue definition in proto format

BytesValue

static

Wrapper message for bytes.

The JSON representation for BytesValue is JSON string.

Property

Parameter

value

string

The bytes value.

See also

google.protobuf.BytesValue definition in proto format

DoubleValue

static

Wrapper message for double.

The JSON representation for DoubleValue is JSON number.

Property

Parameter

value

number

The double value.

See also

google.protobuf.DoubleValue definition in proto format

FloatValue

static

Wrapper message for float.

The JSON representation for FloatValue is JSON number.

Property

Parameter

value

number

The float value.

See also

google.protobuf.FloatValue definition in proto format

Int32Value

static

Wrapper message for int32.

The JSON representation for Int32Value is JSON number.

Property

Parameter

value

number

The int32 value.

See also

google.protobuf.Int32Value definition in proto format

Int64Value

static

Wrapper message for int64.

The JSON representation for Int64Value is JSON string.

Property

Parameter

value

number

The int64 value.

See also

google.protobuf.Int64Value definition in proto format

StringValue

static

Wrapper message for string.

The JSON representation for StringValue is JSON string.

Property

Parameter

value

string

The string value.

See also

google.protobuf.StringValue definition in proto format

UInt32Value

static

Wrapper message for uint32.

The JSON representation for UInt32Value is JSON number.

Property

Parameter

value

number

The uint32 value.

See also

google.protobuf.UInt32Value definition in proto format

UInt64Value

static

Wrapper message for uint64.

The JSON representation for UInt64Value is JSON string.

Property

Parameter

value

number

The uint64 value.

See also

google.protobuf.UInt64Value definition in proto format