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("[email protected]");
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);
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: "[email protected]"
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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