Re: [protobuf] Builders containing builders
> I wish I could pass a builder object to a method and have the method
> modify either a value of the builder or a value of a sub-message in
> the builder!
>
> I came across this thread, which described exactly the problem I have.
> The Car/Engine example in the thread is perfectly illustrative of my
> scenario.
>
> http://groups.google.com/group/protobuf/browse_thread/thread/1699791071e92c83/fc77205a755721f0
>
> Has anyone else been in this same situation? What have you done to
> ameliorate the problem?
Generally speaking, I use non-PB model objects as my primary in-memory
representation, and then I serialize them on demand to get the PB
representation when I need it. For instance, something like:
public class Engine {
private String make;
private double volumeLiters;
public EnginePb serialize() {
return
EnginePb.newBuilder().setMake(make).setVolumeLiters(volumeLiters).build();
}
}
public class Car {
private Engine engine;
private String make;
private String name;
public CarPb serialize() {
return
CarPb.newBuilder().setMake(make).setName(name).setEngine(engine.serialize()).build();
}
}
- Adam
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Re: [protobuf] Builders containing builders
You should be able to pass a builder to some method, and have the method
modify some value of the builder just fine.
Modifying a value in a sub-message is a bit more inconvenient, but still
doable. If you have some type Bar in type Foo like:
message Bar {
optional int32 a = 1;
optional int32 b = 2;
}
message Foo {
optional Bar bar = 1;
}
Foo.Builder builder;
builder.setBar(builder.getBar().toBuilder().setA(...).build());
Would that work for you?
On Wed, Dec 16, 2009 at 9:24 AM, Mark wrote:
> I wish I could pass a builder object to a method and have the method
> modify either a value of the builder or a value of a sub-message in
> the builder!
>
> I came across this thread, which described exactly the problem I have.
> The Car/Engine example in the thread is perfectly illustrative of my
> scenario.
>
>
> http://groups.google.com/group/protobuf/browse_thread/thread/1699791071e92c83/fc77205a755721f0
>
> Has anyone else been in this same situation? What have you done to
> ameliorate the problem?
>
> --
>
> You received this message because you are subscribed to the Google Groups
> "Protocol Buffers" group.
> To post to this group, send email to proto...@googlegroups.com.
> To unsubscribe from this group, send email to
> protobuf+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/protobuf?hl=en.
>
>
>
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[protobuf] Builders containing builders
I wish I could pass a builder object to a method and have the method modify either a value of the builder or a value of a sub-message in the builder! I came across this thread, which described exactly the problem I have. The Car/Engine example in the thread is perfectly illustrative of my scenario. http://groups.google.com/group/protobuf/browse_thread/thread/1699791071e92c83/fc77205a755721f0 Has anyone else been in this same situation? What have you done to ameliorate the problem? -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to proto...@googlegroups.com. To unsubscribe from this group, send email to protobuf+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.
