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#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#endregion
using Google.Protobuf.Collections;
using System;
using System.Collections.Generic;
namespace Google.Protobuf.Reflection
{
/// <summary>
/// Describes a service type.
/// </summary>
public sealed class ServiceDescriptor : DescriptorBase
{
internal ServiceDescriptor(ServiceDescriptorProto proto, FileDescriptor file, int index)
: base(file, file.ComputeFullName(null, proto.Name), index, file.Features.MergedWith(proto.Options?.Features))
{
Proto = proto;
Methods = DescriptorUtil.ConvertAndMakeReadOnly(proto.Method,
(method, i) => new MethodDescriptor(method, file, this, i));
file.DescriptorPool.AddSymbol(this);
}
/// <summary>
/// The brief name of the descriptor's target.
/// </summary>
public override string Name => Proto.Name;
internal override IReadOnlyList<DescriptorBase> GetNestedDescriptorListForField(int fieldNumber) =>
fieldNumber switch
{
ServiceDescriptorProto.MethodFieldNumber => (IReadOnlyList<DescriptorBase>)Methods,
_ => null,
};
internal ServiceDescriptorProto Proto { get; }
/// <summary>
/// Returns a clone of the underlying <see cref="ServiceDescriptorProto"/> describing this service.
/// Note that a copy is taken every time this method is called, so clients using it frequently
/// (and not modifying it) may want to cache the returned value.
/// </summary>
/// <returns>A protobuf representation of this service descriptor.</returns>
public ServiceDescriptorProto ToProto() => Proto.Clone();
/// <value>
/// An unmodifiable list of methods in this service.
/// </value>
public IList<MethodDescriptor> Methods { get; }
/// <summary>
/// Finds a method by name.
/// </summary>
/// <param name="name">The unqualified name of the method (e.g. "Foo").</param>
/// <returns>The method's descriptor, or null if not found.</returns>
public MethodDescriptor FindMethodByName(string name) =>
File.DescriptorPool.FindSymbol<MethodDescriptor>(FullName + "." + name);
/// <summary>
/// The (possibly empty) set of custom options for this service.
/// </summary>
[Obsolete("CustomOptions are obsolete. Use the GetOptions() method.")]
public CustomOptions CustomOptions => new CustomOptions(Proto.Options?._extensions?.ValuesByNumber);
/// <summary>
/// The <c>ServiceOptions</c>, defined in <c>descriptor.proto</c>.
/// If the options message is not present (i.e. there are no options), <c>null</c> is returned.
/// Custom options can be retrieved as extensions of the returned message.
/// NOTE: A defensive copy is created each time this property is retrieved.
/// </summary>
public ServiceOptions GetOptions()
{
var clone = Proto.Options?.Clone();
if (clone is null)
{
return null;
}
// Clients should be using feature accessor methods, not accessing features on the
// options proto.
clone.Features = null;
return clone;
}
/// <summary>
/// Gets a single value service option for this descriptor
/// </summary>
[Obsolete("GetOption is obsolete. Use the GetOptions() method.")]
public T GetOption<T>(Extension<ServiceOptions, T> extension)
{
var value = Proto.Options.GetExtension(extension);
return value is IDeepCloneable<T> ? (value as IDeepCloneable<T>).Clone() : value;
}
/// <summary>
/// Gets a repeated value service option for this descriptor
/// </summary>
[Obsolete("GetOption is obsolete. Use the GetOptions() method.")]
public RepeatedField<T> GetOption<T>(RepeatedExtension<ServiceOptions, T> extension)
{
return Proto.Options.GetExtension(extension).Clone();
}
internal void CrossLink()
{
foreach (MethodDescriptor method in Methods)
{
method.CrossLink();
}
}
}
}