1 #region Copyright notice and license
2 // Protocol Buffers - Google's data interchange format
3 // Copyright 2008 Google Inc. All rights reserved.
4 // https://developers.google.com/protocol-buffers/
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions are
10 // * Redistributions of source code must retain the above copyright
11 // notice, this list of conditions and the following disclaimer.
12 // * Redistributions in binary form must reproduce the above
13 // copyright notice, this list of conditions and the following disclaimer
14 // in the documentation and/or other materials provided with the
16 // * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 using System.Collections;
36 namespace Google.Protobuf.Reflection
39 /// Allows fields to be reflectively accessed.
41 public interface IFieldAccessor
44 /// Returns the descriptor associated with this field.
46 FieldDescriptor Descriptor { get; }
49 /// Clears the field in the specified message. (For repeated fields,
50 /// this clears the list.)
52 void Clear(IMessage message);
55 /// Indicates whether the field in the specified message is set. For proto3 fields, this throws an <see cref="InvalidOperationException"/>
57 bool HasValue(IMessage message);
60 /// Fetches the field value. For repeated values, this will be an
61 /// <see cref="IList"/> implementation. For map values, this will be an
62 /// <see cref="IDictionary"/> implementation.
64 object GetValue(IMessage message);
67 /// Mutator for single "simple" fields only.
70 /// Repeated fields are mutated by fetching the value and manipulating it as a list.
71 /// Map fields are mutated by fetching the value and manipulating it as a dictionary.
73 /// <exception cref="InvalidOperationException">The field is not a "simple" field.</exception>
74 void SetValue(IMessage message, object value);