1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#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; } }
/// <summary>
/// The (possibly empty) set of custom options for this oneof.
/// </summary>
public CustomOptions CustomOptions => proto.Options?.CustomOptions ?? CustomOptions.Empty;
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);
}
}
}
|
