Success! This works nicely (although, lacking polish)
public class MessageFactory {
private final Map<String,Message> defaultMessages = new HashMap<>();
public void add(Class wrapperClass) {
for (Class nestedClass : wrapperClass.getDeclaredClasses()) {
if (!Message.class.isAssignableFrom(nestedClass)) {
continue;
}
try {
String fullName = wrapperClass.getSimpleName() + "." +
nestedClass.getSimpleName();
Message message = (Message)nestedClass.getMethod(
"getDefaultInstance").invoke(null);
defaultMessages.put(fullName, message);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public Message.Builder getBuilder(String fullName) {
Message message = defaultMessages.get(fullName);
if (message == null) {
throw new IllegalArgumentException("Unknown message name '" +
fullName + "'");
}
return message.newBuilderForType();
}
public Message createMessage(String fullName, InputStream is) throws
Exception {
Message.Builder builder = getBuilder(fullName);
CodedInputStream cis = CodedInputStream.newInstance(is);
return builder.mergeFrom(cis).build();
}
public Message createMessage(String fullName, byte[] buffer) throws
Exception {
return createMessage(fullName, new ByteArrayInputStream(buffer));
}
}
--
You received this message because you are subscribed to the Google Groups
"Protocol Buffers" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/protobuf.
For more options, visit https://groups.google.com/d/optout.
