Perfect, it works!
Thank you Robert, Pherl and everyone for the help.
On Jul 28, 4:16 pm, Robert <robert.panzer...@googlemail.com> wrote:
> Hi,
>
> I do only create one FileDescriptor instance that contains all message
> definitions, because they are all constructed dynamically.
> For creating the FileDescriptorProtoBuilder I call:
> FileDescriptorProto.Builder fileDescriptorProtoBuilder =
> FileDescriptorProto.newBuilder();
> Then I create all the message protos by calling (here A and B):
> DescriptorProto.Builder messageProtoBuilderA =
> DescriptorProto.newBuilder();
> messageProtoBuilderA.setName( "A" );
> DescriptorProto.Builder messageProtoBuilderB =
> DescriptorProto.newBuilder();
> messageProtoBuilderB.setName( "B" );
>
> If message A references message B using field f I call:
> messageProtoBuilderA.addFieldBuilder()
> .setName("f")
> .setNumber(2)
> .setTypeName("B");
>
> Then I add the message protos to the file descriptor:
>
> fileDescriptorProtoBuilder.addMessageType(messageProtoBuilderA);
>
> fileDescriptorProtoBuilder.addMessageType(messageProtoBuilderB);
>
> Finally I create the file descriptor using:
> FileDescriptorProto fileDescriptorProto =
> fileDescriptorProtoBuilder.build();
> FileDescriptor fileDescriptor =
> FileDescriptor.buildFrom(fileDescriptorProto, new FileDescriptor[0]);
>
> Now I can create concrete messages by calling:
> Builder messageA =
> DynamicMessage.newBuilder( fileDescriptor.findMessageTypeByName("A") );
> Builder messageB =
> DynamicMessage.newBuilder( fileDescriptor.findMessageTypeByName("B") );
>
> messageA.setField(
>
> fileDescriptor.findMessageTypeByName("A").findFieldByName("f"),
> messageB.build() );
>
> I hope I did not add any errors when abstracting the code and that I
> understood your problem correctly.
>
> Kind regards,
> Robert
>
> On 28 Jul., 14:35, Giancarlo Frison <gfri...@chelab.com> wrote:
>
>
>
>
>
>
>
> > on the field type descriptor previously create i set name as:
> > b2.setName(typename)
>
> > in the container class (which has reference the b2 field) I setup the
> > field as:
> > fb = DescriptorProtos.FieldDescriptorProto.newBuilder()
> > .setName(fieldName).setNumber(i+
> > +).setLabel(label).setTypeName(typename);
> > b1.addField(fb.build());
>
> > For creating the b1 descriptor, first I generate the descriptor of b2
> > then:
> > d1 = b1.build();
> > fdp1 =
> > DescriptorProtos.FileDescriptorProto.newBuilder().addMessageType(d1).build(
> > );
>
> > but I get an error because fdp1.getDependenciesCount()==0
> > (Descriptors.java:233) Dependencies passed to
> > FileDescriptor.buildFrom() don't match those listed in the
> > FileDescriptorProto.
>
> > thrown here:
> > dynamicDescriptor = Descriptors.FileDescriptor.buildFrom(fdp1, fds);
>
> > (fds is array of 1, the b2 descriptor)
>
> > Why the d1 builder doesn't have the dependency defined adding the
> > complex typed field?
>
> > Thanks!!
>
> > Ps.: Robert, it's very kind of you whether send me the related
> > snippet. Thank you
>
> > On Jul 27, 8:10 pm, Pherl Liu <liuj...@google.com> wrote:
>
> > > Take a look at the buildFrom() method. You need to provide an array of
> > > FileDescriptor as dependencies. If one of your message field is a complex
> > > type, you should build that complex type first, and pass the built
> > > FileDescriptor object to the buildFrom() in the dependencies array.
>
> > > On Wed, Jul 27, 2011 at 7:36 AM, Giancarlo Frison
> > > <gfri...@chelab.com>wrote:
>
> > > > if I call setTypeName(messageName), how protobuf match the name with
> > > > related Descriptor?
> > > > How can I map messageName and the descriptor of the type?
>
> > > > On Jul 27, 3:56 pm, Robert <robert.panzer...@googlemail.com> wrote:
> > > > > Hi,
>
> > > > > you either call setType() for primitive types or setTypeName(String)
> > > > > for referenced messages.
> > > > > You pass in the name of the message.
>
> > > > > Kind regards,
> > > > > Robert
>
> > > > > On 27 Jul., 10:35, Giancarlo Frison <gfri...@chelab.com> wrote:
>
> > > > > > Thank you very much Pherl!
>
> > > > > > An another question. What about not-primitive fields, or message
> > > > > > fields?
>
> > > > > > when I add fields I do:
>
> > > > > > DescriptorProtos.DescriptorProto.Builder desBuilder
> > > > > > ....
> > > > > > DescriptorProtos.FieldDescriptorProto.Builder fd1Builder =
> > > > > > DescriptorProtos.FieldDescriptorProto.newBuilder()
> > > > > > .setName(fieldName).setNumber(i+
> > > > > > +).setType(type).setLabel(label);
> > > > > > desBuilder.addField(fd1Builder.build());
>
> > > > > > with message typed field I set type as
> > > > > > 'DescriptorProtos.FieldDescriptorProto.Type.TYPE_MESSAGE'. How do I
> > > > > > describe the field type?
> > > > > > I mean, I suppose to describe the field with a inner
> > > > > > 'DescriptorProtos.DescriptorProto.Builder', is it correct? How I can
> > > > > > do to describe a complex type field?
>
> > > > > > Thanks!
>
> > > > > > On Jul 26, 8:21 pm, Pherl Liu <liuj...@google.com> wrote:
>
> > > > > > > Not sure if I understand your question correctly. You can set the
> > > > label in
> > > > > > > FieldDescriptorProto:
>
> > > > > > > LABEL_OPTIONAL = 1;
>
> > > > > > > LABEL_REQUIRED = 2;LABEL_REPEATED = 3;
>
> > > > > > > On Tue, Jul 26, 2011 at 12:21 AM, Giancarlo Frison <
> > > > gfri...@chelab.com>wrote:
>
> > > > > > > > There is this example that I'm approaching to re-implement
>
> > > >http://flori.posterous.com/dynamically-creating-protocol-buffer-objects
>
> > > > > > > > a question:
>
> > > > > > > > How to handle repeated fields? How can you describe them in the
> > > > > > > > fieldDescriptor?
>
> > > > > > > > On Jul 18, 5:20 pm, yoave <einavy...@gmail.com> wrote:
> > > > > > > > > Hi all,
>
> > > > > > > > > I've got 2 questions:
>
> > > > > > > > > 1. how do I generate a Descriptor from a FileDescriptorProto
> > > > > > > > > in
> > > > Java?
> > > > > > > > > In cpp, I'm using DescriptorPool class's 'BuildFile()'
> > > > > > > > > functionality.
>
> > > > > > > > > 2. how do I generate a Dynamic Message from a Descriptor in
> > > > > > > > > Java?
> > > > > > > > > In cpp, I'm using DynamicMessageFactory class's
> > > > 'GetPrototype()'
> > > > > > > > > functionality.
>
> > > > > > > > > thanks
>
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