Thanks.
Perhaps I should explain my use case a little better.
I have a proto file which is compiled in, for example known.proto
message KnownMessage
{
// more stuff here
}
I also have another proto file which is not compiled in, for example
unknown.proto
import "known.proto";
message UnknownMessage
{
optional KnownMessage known = 1;
// more stuff here
}
What I am trying to do is reflect on a message of type UnknownMessage
looking for messages of type KnownMessage. If I find a matching field I am
trying to copy out the KnownMessage so I can use the generated classes on
it.
...Richard
On Wed, Jan 26, 2011 at 3:34 AM, Kenton Varda wrote:
> They need to have exactly the same Descriptor object. When you create your
> DynamicMessage from the DynamicMessageFactory, pass the Descriptor object
> returned by the generated type's descriptor() or GetDescriptor() method.
> Don't construct a separate Descriptor manually.
>
> Of course, then the question is, why are you using DynamicMessage if you
> have the generated type compiled in? Is it because you need to access
> extensions that aren't compiled in? In that case, you do need
> dynamically-constructed Descriptor objects. The best way to copy in this
> case is to serialize the message, and then parse it into the other type.
>
> On Mon, Jan 24, 2011 at 1:34 AM, Richard Spooner wrote:
>
>> All...
>>
>> I am having problems using CopyFrom to copy a dynamic message in to a
>> generated message.
>>
>> I get the following:
>>
>> libprotobuf FATAL google/protobuf/reflection_ops.cc:54] CHECK failed:
>> (to->GetDescriptor()) == (descriptor): Tried to merge messages of different
>> types.
>>
>> Using GetTypeName() I can verify that the types are the same. I can also
>> be sure that both the dynamic and the generated message use the same proto
>> file.
>>
>> Any ideas? Should it work?
>>
>> ...Richard
>>
>>
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>
>
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