private OneofAccessor CreateAccessor(string clrName)
{
// We won't have a CLR name if this is from a dynamically-loaded FileDescriptor.
// TODO: Support dynamic messages.
if (clrName == null)
{
return(null);
}
if (IsSynthetic)
{
return(OneofAccessor.ForSyntheticOneof(this));
}
else
{
var caseProperty = containingType.ClrType.GetProperty(clrName + "Case");
if (caseProperty == null)
{
throw new DescriptorValidationException(this, $"Property {clrName}Case not found in {containingType.ClrType}");
}
if (!caseProperty.CanRead)
{
throw new ArgumentException($"Cannot read from property {clrName}Case 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(OneofAccessor.ForRegularOneof(this, caseProperty, clearMethod));
}
}
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);
// It's useful to determine whether or not this is a synthetic oneof before cross-linking. That means
// diving into the proto directly rather than using FieldDescriptor, but that's okay.
var firstFieldInOneof = parent.Proto.Field.FirstOrDefault(fieldProto => fieldProto.HasOneofIndex && fieldProto.OneofIndex == index);
IsSynthetic = firstFieldInOneof?.Proto3Optional ?? false;
accessor = CreateAccessor(clrName);
}
