Hi Sergey,
Protocol Buffers have an extension capability which is similar to what you
are describing. The way to describe this in a .proto file would be
something like:
syntax = "proto2";
message ChatMessage {
optional string message = 1;
extensions 100 to 200;
}
// These definitions can be in the same .proto file or a different one.
extend ChatMessage {
optional string hint = 100;
}
extend ChatMessage {
optional string alert = 101;
}
You can read more about extensions here:
https://developers.google.com/protocol-buffers/docs/proto?hl=en#extensions
And the Java API for them is described here:
https://developers.google.com/protocol-buffers/docs/reference/java-generated#extension
Josh
On Friday, January 22, 2016 at 9:54:44 AM UTC-8, Sergey K wrote:
>
> Hi!
> How can I convert a ChatMessage to a proto message?
>
> //Need covert to proto message
> public class ChatMessage {
> private String message;
> private List<Extension> extensions;
> }
>
> interface Extension {
> getName();
> }
>
> public abstract class AbstractExtension implement Extension {
>
> private String name;
> public String getName() { return name;}
> }
>
> public class HelpExtension extends AbstractExtension {
> private String hint;
> }
>
> public class AlertExtension extends AbstractExtension {
> private String alert;
> }
>
> ... and more implemented Extension class.
>
>
>
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