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      1 // Protocol Buffers - Google's data interchange format
      2 // Copyright 2008 Google Inc.  All rights reserved.
      3 // https://developers.google.com/protocol-buffers/
      4 //
      5 // Redistribution and use in source and binary forms, with or without
      6 // modification, are permitted provided that the following conditions are
      7 // met:
      8 //
      9 //     * Redistributions of source code must retain the above copyright
     10 // notice, this list of conditions and the following disclaimer.
     11 //     * Redistributions in binary form must reproduce the above
     12 // copyright notice, this list of conditions and the following disclaimer
     13 // in the documentation and/or other materials provided with the
     14 // distribution.
     15 //     * Neither the name of Google Inc. nor the names of its
     16 // contributors may be used to endorse or promote products derived from
     17 // this software without specific prior written permission.
     18 //
     19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30 
     31 syntax = "proto3";
     32 
     33 package google.protobuf;
     34 
     35 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
     36 option go_package = "github.com/golang/protobuf/ptypes/any";
     37 option java_package = "com.google.protobuf";
     38 option java_outer_classname = "AnyProto";
     39 option java_multiple_files = true;
     40 option objc_class_prefix = "GPB";
     41 
     42 // `Any` contains an arbitrary serialized protocol buffer message along with a
     43 // URL that describes the type of the serialized message.
     44 //
     45 // Protobuf library provides support to pack/unpack Any values in the form
     46 // of utility functions or additional generated methods of the Any type.
     47 //
     48 // Example 1: Pack and unpack a message in C++.
     49 //
     50 //     Foo foo = ...;
     51 //     Any any;
     52 //     any.PackFrom(foo);
     53 //     ...
     54 //     if (any.UnpackTo(&foo)) {
     55 //       ...
     56 //     }
     57 //
     58 // Example 2: Pack and unpack a message in Java.
     59 //
     60 //     Foo foo = ...;
     61 //     Any any = Any.pack(foo);
     62 //     ...
     63 //     if (any.is(Foo.class)) {
     64 //       foo = any.unpack(Foo.class);
     65 //     }
     66 //
     67 //  Example 3: Pack and unpack a message in Python.
     68 //
     69 //     foo = Foo(...)
     70 //     any = Any()
     71 //     any.Pack(foo)
     72 //     ...
     73 //     if any.Is(Foo.DESCRIPTOR):
     74 //       any.Unpack(foo)
     75 //       ...
     76 //
     77 //  Example 4: Pack and unpack a message in Go
     78 //
     79 //      foo := &pb.Foo{...}
     80 //      any, err := ptypes.MarshalAny(foo)
     81 //      ...
     82 //      foo := &pb.Foo{}
     83 //      if err := ptypes.UnmarshalAny(any, foo); err != nil {
     84 //        ...
     85 //      }
     86 //
     87 // The pack methods provided by protobuf library will by default use
     88 // 'type.googleapis.com/full.type.name' as the type URL and the unpack
     89 // methods only use the fully qualified type name after the last '/'
     90 // in the type URL, for example "foo.bar.com/x/y.z" will yield type
     91 // name "y.z".
     92 //
     93 //
     94 // JSON
     95 // ====
     96 // The JSON representation of an `Any` value uses the regular
     97 // representation of the deserialized, embedded message, with an
     98 // additional field `@type` which contains the type URL. Example:
     99 //
    100 //     package google.profile;
    101 //     message Person {
    102 //       string first_name = 1;
    103 //       string last_name = 2;
    104 //     }
    105 //
    106 //     {
    107 //       "@type": "type.googleapis.com/google.profile.Person",
    108 //       "firstName": <string>,
    109 //       "lastName": <string>
    110 //     }
    111 //
    112 // If the embedded message type is well-known and has a custom JSON
    113 // representation, that representation will be embedded adding a field
    114 // `value` which holds the custom JSON in addition to the `@type`
    115 // field. Example (for message [google.protobuf.Duration][]):
    116 //
    117 //     {
    118 //       "@type": "type.googleapis.com/google.protobuf.Duration",
    119 //       "value": "1.212s"
    120 //     }
    121 //
    122 message Any {
    123   // A URL/resource name whose content describes the type of the
    124   // serialized protocol buffer message.
    125   //
    126   // For URLs which use the scheme `http`, `https`, or no scheme, the
    127   // following restrictions and interpretations apply:
    128   //
    129   // * If no scheme is provided, `https` is assumed.
    130   // * The last segment of the URL's path must represent the fully
    131   //   qualified name of the type (as in `path/google.protobuf.Duration`).
    132   //   The name should be in a canonical form (e.g., leading "." is
    133   //   not accepted).
    134   // * An HTTP GET on the URL must yield a [google.protobuf.Type][]
    135   //   value in binary format, or produce an error.
    136   // * Applications are allowed to cache lookup results based on the
    137   //   URL, or have them precompiled into a binary to avoid any
    138   //   lookup. Therefore, binary compatibility needs to be preserved
    139   //   on changes to types. (Use versioned type names to manage
    140   //   breaking changes.)
    141   //
    142   // Schemes other than `http`, `https` (or the empty scheme) might be
    143   // used with implementation specific semantics.
    144   //
    145   string type_url = 1;
    146 
    147   // Must be a valid serialized protocol buffer of the above specified type.
    148   bytes value = 2;
    149 }
    150