diff options
Diffstat (limited to 'csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs')
| -rw-r--r-- | csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs b/csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs index 3d9d0d75..57378e4c 100644 --- a/csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs +++ b/csharp/src/Google.Protobuf/Reflection/FieldDescriptor.cs @@ -31,6 +31,7 @@ #endregion using System; +using System.Linq; namespace Google.Protobuf.Reflection { @@ -45,6 +46,7 @@ namespace Google.Protobuf.Reflection private readonly MessageDescriptor containingType; private readonly OneofDescriptor containingOneof; private FieldType fieldType; + private IFieldAccessor accessor; internal FieldDescriptor(FieldDescriptorProto proto, FileDescriptor file, MessageDescriptor parent, int index) @@ -82,6 +84,8 @@ namespace Google.Protobuf.Reflection public override string Name { get { return proto.Name; } } internal FieldDescriptorProto Proto { get { return proto; } } + + public IFieldAccessor Accessor { get { return accessor; } } /// <summary> /// Maps a field type as included in the .proto file to a FieldType. @@ -287,6 +291,30 @@ namespace Google.Protobuf.Reflection { throw new DescriptorValidationException(this, "MessageSet format is not supported."); } + + accessor = CreateAccessor(); + } + + private IFieldAccessor CreateAccessor() + { + // TODO: Check the performance of this with some large protos. Each message is O(N^2) in the number of fields, + // which isn't great... + if (containingType.GeneratedType == null) + { + return null; + } + var property = containingType + .GeneratedType + .GetProperties() + .FirstOrDefault(p => p.IsDefined(typeof(ProtobufFieldAttribute), false) && + p.GetCustomAttributes(typeof(ProtobufFieldAttribute), false).Cast<ProtobufFieldAttribute>().Single().Number == FieldNumber); + if (property == null) + { + return null; + } + return IsMap ? new MapFieldAccessor(property, this) + : IsRepeated ? new RepeatedFieldAccessor(property, this) + : (IFieldAccessor) new SingleFieldAccessor(property, this); } } }
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