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#region Copyright notice and license
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#endregion
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
namespace Google.Protobuf.Reflection
{
/// <summary>
/// A collection to simplify retrieving the descriptors of extensions in a descriptor for a message
/// </summary>
public sealed class ExtensionCollection
{
private IDictionary<MessageDescriptor, IList<FieldDescriptor>> extensionsByTypeInDeclarationOrder;
private IDictionary<MessageDescriptor, IList<FieldDescriptor>> extensionsByTypeInNumberOrder;
internal ExtensionCollection(FileDescriptor file, Extension[] extensions)
{
UnorderedExtensions = DescriptorUtil.ConvertAndMakeReadOnly(
file.Proto.Extension,
(extension, i) => {
if (extensions?.Length != 0)
{
return new FieldDescriptor(extension, file, null, i, null, extensions?[i]);
}
else
{
return new FieldDescriptor(extension, file, null, i, null, null); // return null if there's no extensions in this array for old code-gen
}
});
}
internal ExtensionCollection(MessageDescriptor message, Extension[] extensions)
{
UnorderedExtensions = DescriptorUtil.ConvertAndMakeReadOnly(
message.Proto.Extension,
(extension, i) => {
if (extensions?.Length != 0)
{
return new FieldDescriptor(extension, message.File, message, i, null, extensions?[i]);
}
else
{
return new FieldDescriptor(extension, message.File, message, i, null, null);
}
});
}
/// <summary>
/// Returns a readonly list of all the extensions defined in this type in
/// the order they were defined in the source .proto file
/// </summary>
public IList<FieldDescriptor> UnorderedExtensions { get; }
/// <summary>
/// Returns a readonly list of all the extensions define in this type that extend
/// the provided descriptor type in the order they were defined in the source .proto file
/// </summary>
public IList<FieldDescriptor> GetExtensionsInDeclarationOrder(MessageDescriptor descriptor)
{
return extensionsByTypeInDeclarationOrder[descriptor];
}
/// <summary>
/// Returns a readonly list of all the extensions define in this type that extend
/// the provided descriptor type in ascending field order
/// </summary>
public IList<FieldDescriptor> GetExtensionsInNumberOrder(MessageDescriptor descriptor)
{
return extensionsByTypeInNumberOrder[descriptor];
}
internal void CrossLink()
{
Dictionary<MessageDescriptor, IList<FieldDescriptor>> declarationOrder = new Dictionary<MessageDescriptor, IList<FieldDescriptor>>();
foreach (FieldDescriptor descriptor in UnorderedExtensions)
{
descriptor.CrossLink();
if (!declarationOrder.TryGetValue(descriptor.ExtendeeType, out IList<FieldDescriptor> list))
{
list = new List<FieldDescriptor>();
declarationOrder.Add(descriptor.ExtendeeType, list);
}
list.Add(descriptor);
}
extensionsByTypeInDeclarationOrder = declarationOrder
.ToDictionary(kvp => kvp.Key, kvp => (IList<FieldDescriptor>)new ReadOnlyCollection<FieldDescriptor>(kvp.Value));
extensionsByTypeInNumberOrder = declarationOrder
.ToDictionary(kvp => kvp.Key, kvp => (IList<FieldDescriptor>)new ReadOnlyCollection<FieldDescriptor>(kvp.Value.OrderBy(field => field.FieldNumber).ToArray()));
}
}
}