[8295] | 1 | // Protocol Buffers - Google's data interchange format
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| 2 | // Copyright 2008 Google Inc. All rights reserved.
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| 3 | // http://github.com/jskeet/dotnet-protobufs/
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| 4 | // Original C++/Java/Python code:
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| 5 | // http://code.google.com/p/protobuf/
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| 6 | //
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| 7 | // Redistribution and use in source and binary forms, with or without
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| 8 | // modification, are permitted provided that the following conditions are
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| 9 | // met:
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| 10 | //
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| 11 | // * Redistributions of source code must retain the above copyright
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| 12 | // notice, this list of conditions and the following disclaimer.
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| 13 | // * Redistributions in binary form must reproduce the above
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| 14 | // copyright notice, this list of conditions and the following disclaimer
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| 15 | // in the documentation and/or other materials provided with the
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| 16 | // distribution.
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| 17 | // * Neither the name of Google Inc. nor the names of its
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| 18 | // contributors may be used to endorse or promote products derived from
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| 19 | // this software without specific prior written permission.
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| 20 | //
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| 21 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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| 22 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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| 23 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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| 24 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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| 25 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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| 26 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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| 27 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 28 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 29 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 30 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 31 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 32 | using System;
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| 33 | using System.Collections.Generic;
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| 34 | using System.Collections.ObjectModel;
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| 35 | using System.IO;
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| 36 | using Google.ProtocolBuffers.DescriptorProtos;
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| 37 | using FileOptions = Google.ProtocolBuffers.DescriptorProtos.FileOptions;
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| 38 |
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| 39 | namespace Google.ProtocolBuffers.Descriptors
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| 40 | {
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| 41 | /// <summary>
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| 42 | /// Describes a .proto file, including everything defined within.
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| 43 | /// IDescriptor is implemented such that the File property returns this descriptor,
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| 44 | /// and the FullName is the same as the Name.
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| 45 | /// </summary>
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| 46 | public sealed class FileDescriptor : IDescriptor<FileDescriptorProto>
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| 47 | {
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| 48 | private FileDescriptorProto proto;
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| 49 | private readonly IList<MessageDescriptor> messageTypes;
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| 50 | private readonly IList<EnumDescriptor> enumTypes;
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| 51 | private readonly IList<ServiceDescriptor> services;
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| 52 | private readonly IList<FieldDescriptor> extensions;
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| 53 | private readonly IList<FileDescriptor> dependencies;
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| 54 | private readonly DescriptorPool pool;
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| 55 | private CSharpFileOptions csharpFileOptions;
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| 56 | private readonly object optionsLock = new object();
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| 57 |
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| 58 | private FileDescriptor(FileDescriptorProto proto, FileDescriptor[] dependencies, DescriptorPool pool)
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| 59 | {
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| 60 | this.pool = pool;
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| 61 | this.proto = proto;
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| 62 | this.dependencies = new ReadOnlyCollection<FileDescriptor>((FileDescriptor[]) dependencies.Clone());
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| 63 |
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| 64 | pool.AddPackage(Package, this);
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| 65 |
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| 66 | messageTypes = DescriptorUtil.ConvertAndMakeReadOnly(proto.MessageTypeList,
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| 67 | (message, index) =>
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| 68 | new MessageDescriptor(message, this, null, index));
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| 69 |
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| 70 | enumTypes = DescriptorUtil.ConvertAndMakeReadOnly(proto.EnumTypeList,
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| 71 | (enumType, index) =>
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| 72 | new EnumDescriptor(enumType, this, null, index));
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| 73 |
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| 74 | services = DescriptorUtil.ConvertAndMakeReadOnly(proto.ServiceList,
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| 75 | (service, index) =>
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| 76 | new ServiceDescriptor(service, this, index));
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| 77 |
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| 78 | extensions = DescriptorUtil.ConvertAndMakeReadOnly(proto.ExtensionList,
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| 79 | (field, index) =>
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| 80 | new FieldDescriptor(field, this, null, index, true));
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| 81 | }
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| 82 |
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| 83 |
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| 84 | /// <summary>
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| 85 | /// Allows a file descriptor to be configured with a set of external options, e.g. from the
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| 86 | /// command-line arguments to protogen.
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| 87 | /// </summary>
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| 88 | public void ConfigureWithDefaultOptions(CSharpFileOptions options)
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| 89 | {
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| 90 | csharpFileOptions = BuildOrFakeWithDefaultOptions(options);
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| 91 | }
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| 92 |
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| 93 | private CSharpFileOptions BuildOrFakeWithDefaultOptions(CSharpFileOptions defaultOptions)
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| 94 | {
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| 95 | // Fix for being able to relocate these files to any directory structure
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| 96 | if (proto.Package == "google.protobuf")
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| 97 | {
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| 98 | string filename = Path.GetFileName(proto.Name);
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| 99 | // TODO(jonskeet): Check if we could use FileDescriptorProto.Descriptor.Name - interesting bootstrap issues)
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| 100 | if (filename == "descriptor.proto")
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| 101 | {
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| 102 | return new CSharpFileOptions.Builder
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| 103 | {
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| 104 | Namespace = "Google.ProtocolBuffers.DescriptorProtos",
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| 105 | UmbrellaClassname = "DescriptorProtoFile",
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| 106 | NestClasses = false,
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| 107 | MultipleFiles = false,
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| 108 | PublicClasses = true,
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| 109 | OutputDirectory = defaultOptions.OutputDirectory,
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| 110 | IgnoreGoogleProtobuf = defaultOptions.IgnoreGoogleProtobuf
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| 111 | }.Build();
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| 112 | }
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| 113 | if (filename == "csharp_options.proto")
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| 114 | {
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| 115 | return new CSharpFileOptions.Builder
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| 116 | {
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| 117 | Namespace = "Google.ProtocolBuffers.DescriptorProtos",
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| 118 | UmbrellaClassname = "CSharpOptions",
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| 119 | NestClasses = false,
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| 120 | MultipleFiles = false,
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| 121 | PublicClasses = true,
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| 122 | OutputDirectory = defaultOptions.OutputDirectory,
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| 123 | IgnoreGoogleProtobuf = defaultOptions.IgnoreGoogleProtobuf
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| 124 | }.Build();
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| 125 | }
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| 126 | }
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| 127 | CSharpFileOptions.Builder builder = defaultOptions.ToBuilder();
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| 128 | if (proto.Options.HasExtension(DescriptorProtos.CSharpOptions.CSharpFileOptions))
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| 129 | {
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| 130 | builder.MergeFrom(proto.Options.GetExtension(DescriptorProtos.CSharpOptions.CSharpFileOptions));
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| 131 | }
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| 132 | if (!builder.HasNamespace)
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| 133 | {
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| 134 | builder.Namespace = Package;
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| 135 | }
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| 136 | if (!builder.HasUmbrellaClassname)
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| 137 | {
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| 138 | int lastSlash = Name.LastIndexOf('/');
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| 139 | string baseName = Name.Substring(lastSlash + 1);
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| 140 | builder.UmbrellaClassname = NameHelpers.UnderscoresToPascalCase(NameHelpers.StripProto(baseName));
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| 141 | }
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| 142 |
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| 143 | // Auto-fix for name collision by placing umbrella class into a new namespace. This
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| 144 | // still won't fix the collisions with nesting enabled; however, you have to turn that on explicitly anyway.
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| 145 | if (!builder.NestClasses && !builder.HasUmbrellaNamespace)
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| 146 | {
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| 147 | bool collision = false;
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| 148 | foreach (IDescriptor d in MessageTypes)
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| 149 | {
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| 150 | collision |= d.Name == builder.UmbrellaClassname;
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| 151 | }
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| 152 | foreach (IDescriptor d in Services)
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| 153 | {
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| 154 | collision |= d.Name == builder.UmbrellaClassname;
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| 155 | }
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| 156 | foreach (IDescriptor d in EnumTypes)
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| 157 | {
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| 158 | collision |= d.Name == builder.UmbrellaClassname;
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| 159 | }
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| 160 | if (collision)
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| 161 | {
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| 162 | builder.UmbrellaNamespace = "Proto";
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| 163 | }
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| 164 | }
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| 165 |
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| 166 | return builder.Build();
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| 167 | }
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| 168 |
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| 169 | /// <value>
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| 170 | /// The descriptor in its protocol message representation.
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| 171 | /// </value>
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| 172 | public FileDescriptorProto Proto
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| 173 | {
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| 174 | get { return proto; }
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| 175 | }
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| 176 |
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| 177 | /// <value>
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| 178 | /// The <see cref="DescriptorProtos.FileOptions" /> defined in <c>descriptor.proto</c>.
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| 179 | /// </value>
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| 180 | public FileOptions Options
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| 181 | {
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| 182 | get { return proto.Options; }
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| 183 | }
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| 184 |
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| 185 | /// <summary>
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| 186 | /// Returns the C#-specific options for this file descriptor. This will always be
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| 187 | /// completely filled in.
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| 188 | /// </summary>
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| 189 | public CSharpFileOptions CSharpOptions
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| 190 | {
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| 191 | get
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| 192 | {
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| 193 | lock (optionsLock)
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| 194 | {
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| 195 | if (csharpFileOptions == null)
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| 196 | {
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| 197 | csharpFileOptions = BuildOrFakeWithDefaultOptions(CSharpFileOptions.DefaultInstance);
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| 198 | }
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| 199 | }
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| 200 | return csharpFileOptions;
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| 201 | }
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| 202 | }
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| 203 |
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| 204 | /// <value>
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| 205 | /// The file name.
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| 206 | /// </value>
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| 207 | public string Name
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| 208 | {
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| 209 | get { return proto.Name; }
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| 210 | }
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| 211 |
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| 212 | /// <summary>
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| 213 | /// The package as declared in the .proto file. This may or may not
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| 214 | /// be equivalent to the .NET namespace of the generated classes.
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| 215 | /// </summary>
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| 216 | public string Package
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| 217 | {
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| 218 | get { return proto.Package; }
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| 219 | }
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| 220 |
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| 221 | /// <value>
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| 222 | /// Unmodifiable list of top-level message types declared in this file.
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| 223 | /// </value>
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| 224 | public IList<MessageDescriptor> MessageTypes
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| 225 | {
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| 226 | get { return messageTypes; }
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| 227 | }
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| 228 |
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| 229 | /// <value>
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| 230 | /// Unmodifiable list of top-level enum types declared in this file.
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| 231 | /// </value>
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| 232 | public IList<EnumDescriptor> EnumTypes
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| 233 | {
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| 234 | get { return enumTypes; }
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| 235 | }
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| 236 |
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| 237 | /// <value>
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| 238 | /// Unmodifiable list of top-level services declared in this file.
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| 239 | /// </value>
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| 240 | public IList<ServiceDescriptor> Services
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| 241 | {
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| 242 | get { return services; }
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| 243 | }
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| 244 |
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| 245 | /// <value>
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| 246 | /// Unmodifiable list of top-level extensions declared in this file.
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| 247 | /// </value>
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| 248 | public IList<FieldDescriptor> Extensions
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| 249 | {
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| 250 | get { return extensions; }
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| 251 | }
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| 252 |
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| 253 | /// <value>
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| 254 | /// Unmodifiable list of this file's dependencies (imports).
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| 255 | /// </value>
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| 256 | public IList<FileDescriptor> Dependencies
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| 257 | {
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| 258 | get { return dependencies; }
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| 259 | }
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| 260 |
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| 261 | /// <value>
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| 262 | /// Implementation of IDescriptor.FullName - just returns the same as Name.
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| 263 | /// </value>
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| 264 | string IDescriptor.FullName
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| 265 | {
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| 266 | get { return Name; }
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| 267 | }
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| 268 |
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| 269 | /// <value>
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| 270 | /// Implementation of IDescriptor.File - just returns this descriptor.
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| 271 | /// </value>
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| 272 | FileDescriptor IDescriptor.File
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| 273 | {
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| 274 | get { return this; }
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| 275 | }
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| 276 |
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| 277 | /// <value>
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| 278 | /// Protocol buffer describing this descriptor.
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| 279 | /// </value>
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| 280 | IMessage IDescriptor.Proto
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| 281 | {
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| 282 | get { return Proto; }
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| 283 | }
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| 284 |
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| 285 | /// <value>
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| 286 | /// Pool containing symbol descriptors.
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| 287 | /// </value>
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| 288 | internal DescriptorPool DescriptorPool
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| 289 | {
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| 290 | get { return pool; }
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| 291 | }
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| 292 |
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| 293 | /// <summary>
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| 294 | /// Finds a type (message, enum, service or extension) in the file by name. Does not find nested types.
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| 295 | /// </summary>
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| 296 | /// <param name="name">The unqualified type name to look for.</param>
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| 297 | /// <typeparam name="T">The type of descriptor to look for (or ITypeDescriptor for any)</typeparam>
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| 298 | /// <returns>The type's descriptor, or null if not found.</returns>
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| 299 | public T FindTypeByName<T>(String name)
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| 300 | where T : class, IDescriptor
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| 301 | {
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| 302 | // Don't allow looking up nested types. This will make optimization
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| 303 | // easier later.
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| 304 | if (name.IndexOf('.') != -1)
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| 305 | {
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| 306 | return null;
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| 307 | }
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| 308 | if (Package.Length > 0)
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| 309 | {
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| 310 | name = Package + "." + name;
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| 311 | }
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| 312 | T result = pool.FindSymbol<T>(name);
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| 313 | if (result != null && result.File == this)
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| 314 | {
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| 315 | return result;
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| 316 | }
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| 317 | return null;
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| 318 | }
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| 319 |
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| 320 | /// <summary>
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| 321 | /// Builds a FileDescriptor from its protocol buffer representation.
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| 322 | /// </summary>
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| 323 | /// <param name="proto">The protocol message form of the FileDescriptor.</param>
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| 324 | /// <param name="dependencies">FileDescriptors corresponding to all of the
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| 325 | /// file's dependencies, in the exact order listed in the .proto file. May be null,
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| 326 | /// in which case it is treated as an empty array.</param>
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| 327 | /// <exception cref="DescriptorValidationException">If <paramref name="proto"/> is not
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| 328 | /// a valid descriptor. This can occur for a number of reasons, such as a field
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| 329 | /// having an undefined type or because two messages were defined with the same name.</exception>
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| 330 | public static FileDescriptor BuildFrom(FileDescriptorProto proto, FileDescriptor[] dependencies)
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| 331 | {
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| 332 | // Building descriptors involves two steps: translating and linking.
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| 333 | // In the translation step (implemented by FileDescriptor's
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| 334 | // constructor), we build an object tree mirroring the
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| 335 | // FileDescriptorProto's tree and put all of the descriptors into the
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| 336 | // DescriptorPool's lookup tables. In the linking step, we look up all
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| 337 | // type references in the DescriptorPool, so that, for example, a
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| 338 | // FieldDescriptor for an embedded message contains a pointer directly
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| 339 | // to the Descriptor for that message's type. We also detect undefined
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| 340 | // types in the linking step.
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| 341 | if (dependencies == null)
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| 342 | {
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| 343 | dependencies = new FileDescriptor[0];
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| 344 | }
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| 345 |
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| 346 | DescriptorPool pool = new DescriptorPool(dependencies);
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| 347 | FileDescriptor result = new FileDescriptor(proto, dependencies, pool);
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| 348 |
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| 349 | if (dependencies.Length != proto.DependencyCount)
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| 350 | {
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| 351 | throw new DescriptorValidationException(result,
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| 352 | "Dependencies passed to FileDescriptor.BuildFrom() don't match " +
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| 353 | "those listed in the FileDescriptorProto.");
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| 354 | }
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| 355 | for (int i = 0; i < proto.DependencyCount; i++)
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| 356 | {
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| 357 | if (dependencies[i].Name != proto.DependencyList[i])
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| 358 | {
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| 359 | throw new DescriptorValidationException(result,
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| 360 | "Dependencies passed to FileDescriptor.BuildFrom() don't match " +
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| 361 | "those listed in the FileDescriptorProto.");
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| 362 | }
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| 363 | }
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| 364 |
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| 365 | result.CrossLink();
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| 366 | return result;
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| 367 | }
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| 368 |
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| 369 | private void CrossLink()
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| 370 | {
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| 371 | foreach (MessageDescriptor message in messageTypes)
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| 372 | {
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| 373 | message.CrossLink();
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| 374 | }
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| 375 |
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| 376 | foreach (ServiceDescriptor service in services)
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| 377 | {
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| 378 | service.CrossLink();
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| 379 | }
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| 380 |
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| 381 | foreach (FieldDescriptor extension in extensions)
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| 382 | {
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| 383 | extension.CrossLink();
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| 384 | }
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| 385 |
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| 386 | foreach (MessageDescriptor message in messageTypes)
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| 387 | {
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| 388 | message.CheckRequiredFields();
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| 389 | }
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| 390 | }
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| 391 |
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| 392 | /// <summary>
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| 393 | /// This method is to be called by generated code only. It is equivalent
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| 394 | /// to BuildFrom except that the FileDescriptorProto is encoded in
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| 395 | /// protocol buffer wire format. This overload is maintained for backward
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| 396 | /// compatibility with source code generated before the custom options were available
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| 397 | /// (and working).
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| 398 | /// </summary>
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| 399 | public static FileDescriptor InternalBuildGeneratedFileFrom(byte[] descriptorData, FileDescriptor[] dependencies)
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| 400 | {
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| 401 | return InternalBuildGeneratedFileFrom(descriptorData, dependencies, x => null);
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| 402 | }
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| 403 |
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| 404 | /// <summary>
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| 405 | /// This delegate should be used by generated code only. When calling
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| 406 | /// FileDescriptor.InternalBuildGeneratedFileFrom, the caller can provide
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| 407 | /// a callback which assigns the global variables defined in the generated code
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| 408 | /// which point at parts of the FileDescriptor. The callback returns an
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| 409 | /// Extension Registry which contains any extensions which might be used in
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| 410 | /// the descriptor - that is, extensions of the various "Options" messages defined
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| 411 | /// in descriptor.proto. The callback may also return null to indicate that
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| 412 | /// no extensions are used in the descriptor.
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| 413 | /// </summary>
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| 414 | /// <param name="descriptor"></param>
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| 415 | /// <returns></returns>
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| 416 | public delegate ExtensionRegistry InternalDescriptorAssigner(FileDescriptor descriptor);
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| 417 |
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| 418 | public static FileDescriptor InternalBuildGeneratedFileFrom(byte[] descriptorData,
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| 419 | FileDescriptor[] dependencies,
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| 420 | InternalDescriptorAssigner descriptorAssigner)
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| 421 | {
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| 422 | FileDescriptorProto proto;
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| 423 | try
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| 424 | {
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| 425 | proto = FileDescriptorProto.ParseFrom(descriptorData);
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| 426 | }
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| 427 | catch (InvalidProtocolBufferException e)
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| 428 | {
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| 429 | throw new ArgumentException("Failed to parse protocol buffer descriptor for generated code.", e);
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| 430 | }
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| 431 |
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| 432 | FileDescriptor result;
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| 433 | try
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| 434 | {
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| 435 | result = BuildFrom(proto, dependencies);
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| 436 | }
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| 437 | catch (DescriptorValidationException e)
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| 438 | {
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| 439 | throw new ArgumentException("Invalid embedded descriptor for \"" + proto.Name + "\".", e);
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| 440 | }
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| 441 |
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| 442 | ExtensionRegistry registry = descriptorAssigner(result);
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| 443 |
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| 444 | if (registry != null)
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| 445 | {
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| 446 | // We must re-parse the proto using the registry.
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| 447 | try
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| 448 | {
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| 449 | proto = FileDescriptorProto.ParseFrom(descriptorData, registry);
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| 450 | }
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| 451 | catch (InvalidProtocolBufferException e)
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| 452 | {
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| 453 | throw new ArgumentException("Failed to parse protocol buffer descriptor for generated code.", e);
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| 454 | }
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| 455 |
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| 456 | result.ReplaceProto(proto);
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| 457 | }
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| 458 | return result;
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| 459 | }
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| 460 |
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| 461 | /// <summary>
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| 462 | /// Replace our FileDescriptorProto with the given one, which is
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| 463 | /// identical except that it might contain extensions that weren't present
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| 464 | /// in the original. This method is needed for bootstrapping when a file
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| 465 | /// defines custom options. The options may be defined in the file itself,
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| 466 | /// so we can't actually parse them until we've constructed the descriptors,
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| 467 | /// but to construct the decsriptors we have to have parsed the descriptor
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| 468 | /// protos. So, we have to parse the descriptor protos a second time after
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| 469 | /// constructing the descriptors.
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| 470 | /// </summary>
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| 471 | private void ReplaceProto(FileDescriptorProto newProto)
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| 472 | {
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| 473 | proto = newProto;
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| 474 |
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| 475 | for (int i = 0; i < messageTypes.Count; i++)
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| 476 | {
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| 477 | messageTypes[i].ReplaceProto(proto.GetMessageType(i));
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| 478 | }
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| 479 |
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| 480 | for (int i = 0; i < enumTypes.Count; i++)
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| 481 | {
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| 482 | enumTypes[i].ReplaceProto(proto.GetEnumType(i));
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| 483 | }
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| 484 |
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| 485 | for (int i = 0; i < services.Count; i++)
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| 486 | {
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| 487 | services[i].ReplaceProto(proto.GetService(i));
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| 488 | }
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| 489 |
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| 490 | for (int i = 0; i < extensions.Count; i++)
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| 491 | {
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| 492 | extensions[i].ReplaceProto(proto.GetExtension(i));
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| 493 | }
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| 494 | }
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| 495 | }
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| 496 | } |
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