/// <summary>
/// Converts the given descriptor binary data into FileDescriptor objects.
/// Note: reflection using the returned FileDescriptors is not currently supported.
/// </summary>
/// <param name="descriptorData">The binary file descriptor proto data. Must not be null, and any
/// dependencies must come before the descriptor which depends on them. (If A depends on B, and B
/// depends on C, then the descriptors must be presented in the order C, B, A.) This is compatible
/// with the order in which protoc provides descriptors to plugins.</param>
/// <returns>The file descriptors corresponding to <paramref name="descriptorData"/>.</returns>
public static IReadOnlyList <FileDescriptor> BuildFromByteStrings(IEnumerable <ByteString> descriptorData)
{
ProtoPreconditions.CheckNotNull(descriptorData, nameof(descriptorData));
// TODO: See if we can build a single DescriptorPool instead of building lots of them.
// This will all behave correctly, but it's less efficient than we'd like.
var descriptors = new List <FileDescriptor>();
var descriptorsByName = new Dictionary <string, FileDescriptor>();
foreach (var data in descriptorData)
{
var proto = FileDescriptorProto.Parser.ParseFrom(data);
var dependencies = new List <FileDescriptor>();
foreach (var dependencyName in proto.Dependency)
{
FileDescriptor dependency;
if (!descriptorsByName.TryGetValue(dependencyName, out dependency))
{
throw new ArgumentException($"Dependency missing: {dependencyName}");
}
dependencies.Add(dependency);
}
var pool = new DescriptorPool(dependencies);
FileDescriptor descriptor = new FileDescriptor(
data, proto, dependencies, pool,
allowUnknownDependencies: false, generatedCodeInfo: null);
descriptor.CrossLink();
descriptors.Add(descriptor);
if (descriptorsByName.ContainsKey(descriptor.Name))
{
throw new ArgumentException($"Duplicate descriptor name: {descriptor.Name}");
}
descriptorsByName.Add(descriptor.Name, descriptor);
}
return(new ReadOnlyCollection <FileDescriptor>(descriptors));
}
internal DescriptorBase(FileDescriptor file, string fullName, int index)
{
File = file;
FullName = fullName;
Index = index;
}
