Class: Google::Protobuf::Any

Inherits:

Object

Object
Google::Protobuf::Any

show all

Defined in:: lib/google/cloud/vision/v1/doc/google/protobuf/any.rb

Overview

+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)
  ...

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"
}

Instance Attribute Summary collapse

#type_url ⇒ String
A URL/resource name whose content describes the type of the serialized protocol buffer message.
#value ⇒ String
Must be a valid serialized protocol buffer of the above specified type.

Instance Attribute Details

#type_url ⇒ `String`

Returns 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.

Returns:

(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.

112	# File 'lib/google/cloud/vision/v1/doc/google/protobuf/any.rb', line 112 class Any; end

#value ⇒ `String`

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