// Protocol Buffers - Google's data interchange format | |
// Copyright 2008 Google Inc. All rights reserved. | |
// http://github.com/jskeet/dotnet-protobufs/ | |
// Original C++/Java/Python code: | |
// http://code.google.com/p/protobuf/ | |
// | |
// 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, | |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
using System; | |
using System.Collections.Generic; | |
using System.Reflection; | |
using Google.ProtocolBuffers.Collections; | |
namespace Google.ProtocolBuffers.Descriptors | |
{ | |
/// <summary> | |
/// Defined specifically for the <see cref="FieldType" /> enumeration, | |
/// this allows each field type to specify the mapped type and wire type. | |
/// </summary> | |
[CLSCompliant(false)] | |
[AttributeUsage(AttributeTargets.Field)] | |
public sealed class FieldMappingAttribute : Attribute | |
{ | |
public FieldMappingAttribute(MappedType mappedType, WireFormat.WireType wireType) | |
{ | |
MappedType = mappedType; | |
WireType = wireType; | |
} | |
public MappedType MappedType { get; private set; } | |
public WireFormat.WireType WireType { get; private set; } | |
/// <summary> | |
/// Immutable mapping from field type to mapped type. Built using the attributes on | |
/// FieldType values. | |
/// </summary> | |
private static readonly IDictionary<FieldType, FieldMappingAttribute> FieldTypeToMappedTypeMap = MapFieldTypes(); | |
private static IDictionary<FieldType, FieldMappingAttribute> MapFieldTypes() | |
{ | |
var map = new Dictionary<FieldType, FieldMappingAttribute>(); | |
foreach (FieldInfo field in typeof(FieldType).GetFields(BindingFlags.Static | BindingFlags.Public)) | |
{ | |
FieldType fieldType = (FieldType) field.GetValue(null); | |
FieldMappingAttribute mapping = | |
(FieldMappingAttribute) field.GetCustomAttributes(typeof(FieldMappingAttribute), false)[0]; | |
map[fieldType] = mapping; | |
} | |
return Dictionaries.AsReadOnly(map); | |
} | |
internal static MappedType MappedTypeFromFieldType(FieldType type) | |
{ | |
return FieldTypeToMappedTypeMap[type].MappedType; | |
} | |
internal static WireFormat.WireType WireTypeFromFieldType(FieldType type, bool packed) | |
{ | |
return packed ? WireFormat.WireType.LengthDelimited : FieldTypeToMappedTypeMap[type].WireType; | |
} | |
} | |
} |