621 lines
26 KiB
Protocol Buffer
621 lines
26 KiB
Protocol Buffer
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// http://code.google.com/p/protobuf/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Author: kenton@google.com (Kenton Varda)
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// Based on original Protocol Buffers design by
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// Sanjay Ghemawat, Jeff Dean, and others.
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//
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// The messages in this file describe the definitions found in .proto files.
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// A valid .proto file can be translated directly to a FileDescriptorProto
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// without any other information (e.g. without reading its imports).
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package google.protobuf;
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option java_package = "com.google.protobuf";
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option java_outer_classname = "DescriptorProtos";
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// descriptor.proto must be optimized for speed because reflection-based
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// algorithms don't work during bootstrapping.
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option optimize_for = SPEED;
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// The protocol compiler can output a FileDescriptorSet containing the .proto
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// files it parses.
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message FileDescriptorSet {
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repeated FileDescriptorProto file = 1;
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}
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// Describes a complete .proto file.
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message FileDescriptorProto {
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optional string name = 1; // file name, relative to root of source tree
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optional string package = 2; // e.g. "foo", "foo.bar", etc.
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// Names of files imported by this file.
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repeated string dependency = 3;
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// Indexes of the public imported files in the dependency list above.
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repeated int32 public_dependency = 10;
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// Indexes of the weak imported files in the dependency list.
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// For Google-internal migration only. Do not use.
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repeated int32 weak_dependency = 11;
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// All top-level definitions in this file.
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repeated DescriptorProto message_type = 4;
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repeated EnumDescriptorProto enum_type = 5;
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repeated ServiceDescriptorProto service = 6;
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repeated FieldDescriptorProto extension = 7;
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optional FileOptions options = 8;
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// This field contains optional information about the original source code.
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// You may safely remove this entire field whithout harming runtime
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// functionality of the descriptors -- the information is needed only by
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// development tools.
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optional SourceCodeInfo source_code_info = 9;
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}
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// Describes a message type.
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message DescriptorProto {
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optional string name = 1;
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repeated FieldDescriptorProto field = 2;
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repeated FieldDescriptorProto extension = 6;
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repeated DescriptorProto nested_type = 3;
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repeated EnumDescriptorProto enum_type = 4;
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message ExtensionRange {
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optional int32 start = 1;
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optional int32 end = 2;
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}
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repeated ExtensionRange extension_range = 5;
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optional MessageOptions options = 7;
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}
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// Describes a field within a message.
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message FieldDescriptorProto {
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enum Type {
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// 0 is reserved for errors.
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// Order is weird for historical reasons.
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TYPE_DOUBLE = 1;
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TYPE_FLOAT = 2;
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// Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT64 if
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// negative values are likely.
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TYPE_INT64 = 3;
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TYPE_UINT64 = 4;
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// Not ZigZag encoded. Negative numbers take 10 bytes. Use TYPE_SINT32 if
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// negative values are likely.
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TYPE_INT32 = 5;
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TYPE_FIXED64 = 6;
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TYPE_FIXED32 = 7;
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TYPE_BOOL = 8;
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TYPE_STRING = 9;
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TYPE_GROUP = 10; // Tag-delimited aggregate.
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TYPE_MESSAGE = 11; // Length-delimited aggregate.
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// New in version 2.
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TYPE_BYTES = 12;
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TYPE_UINT32 = 13;
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TYPE_ENUM = 14;
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TYPE_SFIXED32 = 15;
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TYPE_SFIXED64 = 16;
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TYPE_SINT32 = 17; // Uses ZigZag encoding.
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TYPE_SINT64 = 18; // Uses ZigZag encoding.
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};
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enum Label {
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// 0 is reserved for errors
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LABEL_OPTIONAL = 1;
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LABEL_REQUIRED = 2;
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LABEL_REPEATED = 3;
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// TODO(sanjay): Should we add LABEL_MAP?
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};
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optional string name = 1;
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optional int32 number = 3;
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optional Label label = 4;
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// If type_name is set, this need not be set. If both this and type_name
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// are set, this must be either TYPE_ENUM or TYPE_MESSAGE.
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optional Type type = 5;
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// For message and enum types, this is the name of the type. If the name
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// starts with a '.', it is fully-qualified. Otherwise, C++-like scoping
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// rules are used to find the type (i.e. first the nested types within this
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// message are searched, then within the parent, on up to the root
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// namespace).
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optional string type_name = 6;
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// For extensions, this is the name of the type being extended. It is
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// resolved in the same manner as type_name.
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optional string extendee = 2;
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// For numeric types, contains the original text representation of the value.
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// For booleans, "true" or "false".
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// For strings, contains the default text contents (not escaped in any way).
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// For bytes, contains the C escaped value. All bytes >= 128 are escaped.
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// TODO(kenton): Base-64 encode?
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optional string default_value = 7;
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optional FieldOptions options = 8;
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}
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// Describes an enum type.
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message EnumDescriptorProto {
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optional string name = 1;
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repeated EnumValueDescriptorProto value = 2;
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optional EnumOptions options = 3;
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}
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// Describes a value within an enum.
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message EnumValueDescriptorProto {
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optional string name = 1;
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optional int32 number = 2;
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optional EnumValueOptions options = 3;
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}
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// Describes a service.
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message ServiceDescriptorProto {
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optional string name = 1;
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repeated MethodDescriptorProto method = 2;
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optional ServiceOptions options = 3;
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}
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// Describes a method of a service.
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message MethodDescriptorProto {
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optional string name = 1;
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// Input and output type names. These are resolved in the same way as
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// FieldDescriptorProto.type_name, but must refer to a message type.
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optional string input_type = 2;
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optional string output_type = 3;
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optional MethodOptions options = 4;
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}
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// ===================================================================
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// Options
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// Each of the definitions above may have "options" attached. These are
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// just annotations which may cause code to be generated slightly differently
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// or may contain hints for code that manipulates protocol messages.
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//
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// Clients may define custom options as extensions of the *Options messages.
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// These extensions may not yet be known at parsing time, so the parser cannot
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// store the values in them. Instead it stores them in a field in the *Options
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// message called uninterpreted_option. This field must have the same name
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// across all *Options messages. We then use this field to populate the
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// extensions when we build a descriptor, at which point all protos have been
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// parsed and so all extensions are known.
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//
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// Extension numbers for custom options may be chosen as follows:
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// * For options which will only be used within a single application or
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// organization, or for experimental options, use field numbers 50000
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// through 99999. It is up to you to ensure that you do not use the
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// same number for multiple options.
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// * For options which will be published and used publicly by multiple
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// independent entities, e-mail protobuf-global-extension-registry@google.com
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// to reserve extension numbers. Simply provide your project name (e.g.
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// Object-C plugin) and your porject website (if available) -- there's no need
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// to explain how you intend to use them. Usually you only need one extension
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// number. You can declare multiple options with only one extension number by
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// putting them in a sub-message. See the Custom Options section of the docs
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// for examples:
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// http://code.google.com/apis/protocolbuffers/docs/proto.html#options
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// If this turns out to be popular, a web service will be set up
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// to automatically assign option numbers.
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message FileOptions {
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// Sets the Java package where classes generated from this .proto will be
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// placed. By default, the proto package is used, but this is often
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// inappropriate because proto packages do not normally start with backwards
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// domain names.
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optional string java_package = 1;
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// If set, all the classes from the .proto file are wrapped in a single
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// outer class with the given name. This applies to both Proto1
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// (equivalent to the old "--one_java_file" option) and Proto2 (where
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// a .proto always translates to a single class, but you may want to
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// explicitly choose the class name).
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optional string java_outer_classname = 8;
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// If set true, then the Java code generator will generate a separate .java
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// file for each top-level message, enum, and service defined in the .proto
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// file. Thus, these types will *not* be nested inside the outer class
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// named by java_outer_classname. However, the outer class will still be
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// generated to contain the file's getDescriptor() method as well as any
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// top-level extensions defined in the file.
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optional bool java_multiple_files = 10 [default=false];
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// If set true, then the Java code generator will generate equals() and
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// hashCode() methods for all messages defined in the .proto file. This is
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// purely a speed optimization, as the AbstractMessage base class includes
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// reflection-based implementations of these methods.
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optional bool java_generate_equals_and_hash = 20 [default=false];
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// Generated classes can be optimized for speed or code size.
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enum OptimizeMode {
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SPEED = 1; // Generate complete code for parsing, serialization,
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// etc.
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CODE_SIZE = 2; // Use ReflectionOps to implement these methods.
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LITE_RUNTIME = 3; // Generate code using MessageLite and the lite runtime.
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}
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optional OptimizeMode optimize_for = 9 [default=SPEED];
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// Sets the Go package where structs generated from this .proto will be
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// placed. There is no default.
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optional string go_package = 11;
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// Should generic services be generated in each language? "Generic" services
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// are not specific to any particular RPC system. They are generated by the
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// main code generators in each language (without additional plugins).
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// Generic services were the only kind of service generation supported by
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// early versions of proto2.
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//
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// Generic services are now considered deprecated in favor of using plugins
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// that generate code specific to your particular RPC system. Therefore,
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// these default to false. Old code which depends on generic services should
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// explicitly set them to true.
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optional bool cc_generic_services = 16 [default=false];
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optional bool java_generic_services = 17 [default=false];
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optional bool py_generic_services = 18 [default=false];
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// The parser stores options it doesn't recognize here. See above.
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repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message MessageOptions {
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// Set true to use the old proto1 MessageSet wire format for extensions.
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// This is provided for backwards-compatibility with the MessageSet wire
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// format. You should not use this for any other reason: It's less
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// efficient, has fewer features, and is more complicated.
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//
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// The message must be defined exactly as follows:
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// message Foo {
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// option message_set_wire_format = true;
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// extensions 4 to max;
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// }
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// Note that the message cannot have any defined fields; MessageSets only
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// have extensions.
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//
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// All extensions of your type must be singular messages; e.g. they cannot
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// be int32s, enums, or repeated messages.
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//
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// Because this is an option, the above two restrictions are not enforced by
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// the protocol compiler.
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optional bool message_set_wire_format = 1 [default=false];
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// Disables the generation of the standard "descriptor()" accessor, which can
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// conflict with a field of the same name. This is meant to make migration
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// from proto1 easier; new code should avoid fields named "descriptor".
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optional bool no_standard_descriptor_accessor = 2 [default=false];
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// The parser stores options it doesn't recognize here. See above.
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repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message FieldOptions {
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// The ctype option instructs the C++ code generator to use a different
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// representation of the field than it normally would. See the specific
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// options below. This option is not yet implemented in the open source
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// release -- sorry, we'll try to include it in a future version!
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optional CType ctype = 1 [default = STRING];
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enum CType {
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// Default mode.
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STRING = 0;
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CORD = 1;
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STRING_PIECE = 2;
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}
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// The packed option can be enabled for repeated primitive fields to enable
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// a more efficient representation on the wire. Rather than repeatedly
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// writing the tag and type for each element, the entire array is encoded as
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// a single length-delimited blob.
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optional bool packed = 2;
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// Should this field be parsed lazily? Lazy applies only to message-type
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// fields. It means that when the outer message is initially parsed, the
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// inner message's contents will not be parsed but instead stored in encoded
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// form. The inner message will actually be parsed when it is first accessed.
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//
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// This is only a hint. Implementations are free to choose whether to use
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// eager or lazy parsing regardless of the value of this option. However,
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// setting this option true suggests that the protocol author believes that
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// using lazy parsing on this field is worth the additional bookkeeping
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// overhead typically needed to implement it.
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//
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// This option does not affect the public interface of any generated code;
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// all method signatures remain the same. Furthermore, thread-safety of the
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// interface is not affected by this option; const methods remain safe to
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// call from multiple threads concurrently, while non-const methods continue
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// to require exclusive access.
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//
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//
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// Note that implementations may choose not to check required fields within
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// a lazy sub-message. That is, calling IsInitialized() on the outher message
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// may return true even if the inner message has missing required fields.
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// This is necessary because otherwise the inner message would have to be
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// parsed in order to perform the check, defeating the purpose of lazy
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// parsing. An implementation which chooses not to check required fields
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// must be consistent about it. That is, for any particular sub-message, the
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// implementation must either *always* check its required fields, or *never*
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// check its required fields, regardless of whether or not the message has
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// been parsed.
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optional bool lazy = 5 [default=false];
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// Is this field deprecated?
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// Depending on the target platform, this can emit Deprecated annotations
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// for accessors, or it will be completely ignored; in the very least, this
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// is a formalization for deprecating fields.
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optional bool deprecated = 3 [default=false];
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// EXPERIMENTAL. DO NOT USE.
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// For "map" fields, the name of the field in the enclosed type that
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// is the key for this map. For example, suppose we have:
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// message Item {
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// required string name = 1;
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// required string value = 2;
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// }
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// message Config {
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// repeated Item items = 1 [experimental_map_key="name"];
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// }
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// In this situation, the map key for Item will be set to "name".
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// TODO: Fully-implement this, then remove the "experimental_" prefix.
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optional string experimental_map_key = 9;
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// For Google-internal migration only. Do not use.
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optional bool weak = 10 [default=false];
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// The parser stores options it doesn't recognize here. See above.
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repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message EnumOptions {
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// Set this option to false to disallow mapping different tag names to a same
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// value.
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optional bool allow_alias = 2 [default=true];
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|
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// The parser stores options it doesn't recognize here. See above.
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repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message EnumValueOptions {
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// The parser stores options it doesn't recognize here. See above.
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repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message ServiceOptions {
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// Note: Field numbers 1 through 32 are reserved for Google's internal RPC
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// framework. We apologize for hoarding these numbers to ourselves, but
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// we were already using them long before we decided to release Protocol
|
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// Buffers.
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|
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// The parser stores options it doesn't recognize here. See above.
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|
repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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message MethodOptions {
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// Note: Field numbers 1 through 32 are reserved for Google's internal RPC
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|
// framework. We apologize for hoarding these numbers to ourselves, but
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|
// we were already using them long before we decided to release Protocol
|
|
// Buffers.
|
|
|
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// The parser stores options it doesn't recognize here. See above.
|
|
repeated UninterpretedOption uninterpreted_option = 999;
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// Clients can define custom options in extensions of this message. See above.
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extensions 1000 to max;
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}
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// A message representing a option the parser does not recognize. This only
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// appears in options protos created by the compiler::Parser class.
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// DescriptorPool resolves these when building Descriptor objects. Therefore,
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// options protos in descriptor objects (e.g. returned by Descriptor::options(),
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// or produced by Descriptor::CopyTo()) will never have UninterpretedOptions
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// in them.
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message UninterpretedOption {
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// The name of the uninterpreted option. Each string represents a segment in
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// a dot-separated name. is_extension is true iff a segment represents an
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// extension (denoted with parentheses in options specs in .proto files).
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|
// E.g.,{ ["foo", false], ["bar.baz", true], ["qux", false] } represents
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// "foo.(bar.baz).qux".
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message NamePart {
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required string name_part = 1;
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required bool is_extension = 2;
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}
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repeated NamePart name = 2;
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|
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// The value of the uninterpreted option, in whatever type the tokenizer
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// identified it as during parsing. Exactly one of these should be set.
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|
optional string identifier_value = 3;
|
|
optional uint64 positive_int_value = 4;
|
|
optional int64 negative_int_value = 5;
|
|
optional double double_value = 6;
|
|
optional bytes string_value = 7;
|
|
optional string aggregate_value = 8;
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|
}
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|
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// ===================================================================
|
|
// Optional source code info
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// Encapsulates information about the original source file from which a
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// FileDescriptorProto was generated.
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message SourceCodeInfo {
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// A Location identifies a piece of source code in a .proto file which
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// corresponds to a particular definition. This information is intended
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// to be useful to IDEs, code indexers, documentation generators, and similar
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// tools.
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//
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// For example, say we have a file like:
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// message Foo {
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// optional string foo = 1;
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// }
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// Let's look at just the field definition:
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// optional string foo = 1;
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// ^ ^^ ^^ ^ ^^^
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// a bc de f ghi
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// We have the following locations:
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// span path represents
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// [a,i) [ 4, 0, 2, 0 ] The whole field definition.
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// [a,b) [ 4, 0, 2, 0, 4 ] The label (optional).
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// [c,d) [ 4, 0, 2, 0, 5 ] The type (string).
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// [e,f) [ 4, 0, 2, 0, 1 ] The name (foo).
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// [g,h) [ 4, 0, 2, 0, 3 ] The number (1).
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//
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// Notes:
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// - A location may refer to a repeated field itself (i.e. not to any
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// particular index within it). This is used whenever a set of elements are
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// logically enclosed in a single code segment. For example, an entire
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// extend block (possibly containing multiple extension definitions) will
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// have an outer location whose path refers to the "extensions" repeated
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// field without an index.
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// - Multiple locations may have the same path. This happens when a single
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// logical declaration is spread out across multiple places. The most
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// obvious example is the "extend" block again -- there may be multiple
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// extend blocks in the same scope, each of which will have the same path.
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// - A location's span is not always a subset of its parent's span. For
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// example, the "extendee" of an extension declaration appears at the
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// beginning of the "extend" block and is shared by all extensions within
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// the block.
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// - Just because a location's span is a subset of some other location's span
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// does not mean that it is a descendent. For example, a "group" defines
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// both a type and a field in a single declaration. Thus, the locations
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// corresponding to the type and field and their components will overlap.
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// - Code which tries to interpret locations should probably be designed to
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// ignore those that it doesn't understand, as more types of locations could
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// be recorded in the future.
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repeated Location location = 1;
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message Location {
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// Identifies which part of the FileDescriptorProto was defined at this
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// location.
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//
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// Each element is a field number or an index. They form a path from
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// the root FileDescriptorProto to the place where the definition. For
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// example, this path:
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// [ 4, 3, 2, 7, 1 ]
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// refers to:
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// file.message_type(3) // 4, 3
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// .field(7) // 2, 7
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// .name() // 1
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// This is because FileDescriptorProto.message_type has field number 4:
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// repeated DescriptorProto message_type = 4;
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// and DescriptorProto.field has field number 2:
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// repeated FieldDescriptorProto field = 2;
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// and FieldDescriptorProto.name has field number 1:
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// optional string name = 1;
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//
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// Thus, the above path gives the location of a field name. If we removed
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// the last element:
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// [ 4, 3, 2, 7 ]
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// this path refers to the whole field declaration (from the beginning
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// of the label to the terminating semicolon).
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repeated int32 path = 1 [packed=true];
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// Always has exactly three or four elements: start line, start column,
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// end line (optional, otherwise assumed same as start line), end column.
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// These are packed into a single field for efficiency. Note that line
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// and column numbers are zero-based -- typically you will want to add
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// 1 to each before displaying to a user.
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repeated int32 span = 2 [packed=true];
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// If this SourceCodeInfo represents a complete declaration, these are any
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// comments appearing before and after the declaration which appear to be
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// attached to the declaration.
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//
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// A series of line comments appearing on consecutive lines, with no other
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// tokens appearing on those lines, will be treated as a single comment.
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//
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// Only the comment content is provided; comment markers (e.g. //) are
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// stripped out. For block comments, leading whitespace and an asterisk
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// will be stripped from the beginning of each line other than the first.
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// Newlines are included in the output.
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//
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// Examples:
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//
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// optional int32 foo = 1; // Comment attached to foo.
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// // Comment attached to bar.
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// optional int32 bar = 2;
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//
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// optional string baz = 3;
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// // Comment attached to baz.
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// // Another line attached to baz.
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//
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// // Comment attached to qux.
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// //
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// // Another line attached to qux.
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// optional double qux = 4;
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//
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// optional string corge = 5;
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// /* Block comment attached
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// * to corge. Leading asterisks
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// * will be removed. */
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// /* Block comment attached to
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// * grault. */
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// optional int32 grault = 6;
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optional string leading_comments = 3;
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optional string trailing_comments = 4;
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}
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}
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