On Wed, Jun 22, 2011 at 3:30 AM, slookin <sloo...@gmail.com> wrote:
> I trying to develop "flexible" server for reciving message, i'm not
> able to create java classes for each message type, but I can upload
> proto descripter on server. Of course client (sender) will use
> generated java classes for prepare messages:
>
> My code (sender):
> Person.Builder person = Person.newBuilder();
> person.setId(Integer.valueOf(42));
> person.setEmail("test_em...@gmail.com");
> person.setName("Viktor Villari");
> Person p=person.build();
> FileOutputStream fstream = new FileOutputStream ("message.pf");
> CodedOutputStream outSream = CodedOutputStream.newInstance(fstream);
> p.writeTo(outSream);
> outSream.flush();
> System.out.println("sent");
>
> Reciver (address.descriptor.proto - grenerated via descriptor.proto):
> FileInputStream input = new FileInputStream
> ("address.descriptor.proto");
> DescriptorProtos.FileDescriptorSet
> fdsProto=DescriptorProtos.FileDescriptorSet.parseFrom(input);
> input = new FileInputStream ("message.pf");
> //
> System.out.println(fds.getFile(0).getMessageType(0).getName());
> System.out.println("File name =
> "+fdsProto.getFile(0).getName());
> // System.out.println("Message type =
> "+fdsProto.getFile(0).getMessageType(0).getName());
> // System.out.println("Field info =
> "+fdsProto.getFile(0).getMessageType(0).getField(0).getName()+"
> "+fdsProto.getFile(0).getMessageType(0).getField(0).getType());
> FileDescriptor
> fileDescr=FileDescriptor.buildFrom(fdsProto.getFile(0), new
> FileDescriptor[0]);
> System.out.println("Message type =
> "+fileDescr.getMessageTypes().get(0).getName());
> System.out.println("Field info =
> "+fileDescr.getMessageTypes().get(0).getFields().get(0).getName()+"
> type=
> "+fileDescr.getMessageTypes().get(0).getFields().get(0).getType());
> DynamicMessage
> dm=DynamicMessage.parseFrom(fdsProto.getDescriptor(),
> input);
>
On this line, you are passing the descriptor for the FileDescriptorSet. You
should be using fileDescr to get at the Person message type. (Note that your
description scheme does not indicate what message type is actually used. But
I also don't see the code snippet that serializes the FileDescriptorSet, or
for that matter delimit between the FileDescriptorSet and the serialized
Person data, so maybe you are doing something elsewhere)
> System.out.println("DynamicMessage to string
> \n"+dm.toString());
> //---- problem line
> System.out.println("Person.name = "+
> dm.getField(fileDescr.getMessageTypes().get(0).getFields().get(0)));
> //----
>
>
> Output:
> File name = addressbook.proto
> Message type = Person
> Field info = name type= STRING
> DynamicMessage to string
> 2: "Viktor Villari"
> 3: 42
> 4: "test_em...@gmail.com"
>
> Exception in thread "main" java.lang.IllegalArgumentException:
> FieldDescriptor does not match message type.
> at
>
> com.google.protobuf.DynamicMessage.verifyContainingType(DynamicMessage.java:
> 242)
> at com.google.protobuf.DynamicMessage.getField(DynamicMessage.java:
> 160)
> at net.lookin.protobuf.Test.main(Test.java:64)
>
> Why I recive exception?
> How I can access to specific field value in DynamicMessage?
>
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