Squashed 'third_party/protobuf/' content from commit e35e248
Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/csharp/src/Google.Protobuf/Reflection/OneofDescriptor.cs b/csharp/src/Google.Protobuf/Reflection/OneofDescriptor.cs
new file mode 100644
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+++ b/csharp/src/Google.Protobuf/Reflection/OneofDescriptor.cs
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+#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
+// Copyright 2015 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 Google.Protobuf.Compatibility;
+
+namespace Google.Protobuf.Reflection
+{
+ /// <summary>
+ /// Describes a "oneof" field collection in a message type: a set of
+ /// fields of which at most one can be set in any particular message.
+ /// </summary>
+ public sealed class OneofDescriptor : DescriptorBase
+ {
+ private readonly OneofDescriptorProto proto;
+ private MessageDescriptor containingType;
+ private IList<FieldDescriptor> fields;
+ private readonly OneofAccessor accessor;
+
+ internal OneofDescriptor(OneofDescriptorProto proto, FileDescriptor file, MessageDescriptor parent, int index, string clrName)
+ : base(file, file.ComputeFullName(parent, proto.Name), index)
+ {
+ this.proto = proto;
+ containingType = parent;
+
+ file.DescriptorPool.AddSymbol(this);
+ accessor = CreateAccessor(clrName);
+ }
+
+ /// <summary>
+ /// The brief name of the descriptor's target.
+ /// </summary>
+ public override string Name { get { return proto.Name; } }
+
+ /// <summary>
+ /// Gets the message type containing this oneof.
+ /// </summary>
+ /// <value>
+ /// The message type containing this oneof.
+ /// </value>
+ public MessageDescriptor ContainingType
+ {
+ get { return containingType; }
+ }
+
+ /// <summary>
+ /// Gets the fields within this oneof, in declaration order.
+ /// </summary>
+ /// <value>
+ /// The fields within this oneof, in declaration order.
+ /// </value>
+ public IList<FieldDescriptor> Fields { get { return fields; } }
+
+ /// <summary>
+ /// Gets an accessor for reflective access to the values associated with the oneof
+ /// in a particular message.
+ /// </summary>
+ /// <value>
+ /// The accessor used for reflective access.
+ /// </value>
+ public OneofAccessor Accessor { get { return accessor; } }
+
+ internal void CrossLink()
+ {
+ List<FieldDescriptor> fieldCollection = new List<FieldDescriptor>();
+ foreach (var field in ContainingType.Fields.InDeclarationOrder())
+ {
+ if (field.ContainingOneof == this)
+ {
+ fieldCollection.Add(field);
+ }
+ }
+ fields = new ReadOnlyCollection<FieldDescriptor>(fieldCollection);
+ }
+
+ private OneofAccessor CreateAccessor(string clrName)
+ {
+ var caseProperty = containingType.ClrType.GetProperty(clrName + "Case");
+ if (caseProperty == null)
+ {
+ throw new DescriptorValidationException(this, $"Property {clrName}Case not found in {containingType.ClrType}");
+ }
+ var clearMethod = containingType.ClrType.GetMethod("Clear" + clrName);
+ if (clearMethod == null)
+ {
+ throw new DescriptorValidationException(this, $"Method Clear{clrName} not found in {containingType.ClrType}");
+ }
+
+ return new OneofAccessor(caseProperty, clearMethod, this);
+ }
+ }
+}