[GraphHopper] How to initialize my own flagEncoder?

Peter graphhopper at gmx.de
Thu May 28 19:01:22 UTC 2015


Hi,

I'm not sure what you mean with 'combine'. You can mix Java API and read
from config too e.g. via

graphHopper.init(CmdArgs.readFromConfig(..))
graphHopper.setEncodingManager(new YourFlagEncoder(), new
CarFlagEncoder(), ...)

> Could you elaborate a little bit more about the portability reason? I
am new to reflection.

It is just that we want to support JavaScript (TeaVM) and iOS, and for
them we need to avoid some stuff.

Kind Regards,
Peter

On 28.05.2015 20:49, John Zhao wrote:
> Hi Peter,
>
> I want to keep the compatibility of combine the existing flagEncoder
> with my customized flagEncoder.
> And intialize them from the properties file.
>
> Could you elaborate a little bit more about the portability reason?
> I am new to reflection.
>
> *Best Regards,*
> *ZhiQiang ZHAO*
>
> On Thu, May 28, 2015 at 11:44 AM, Peter <graphhopper at gmx.de
> <mailto:graphhopper at gmx.de>> wrote:
>
>     Hi John,
>
>     if you have a custom flagencoder why not just call
>     new EncodingManager(new YourFlagEncoder()) ?
>
>     Reflections was abandoned due to portability reasons but also it
>     is not really necessary here, especially as you use it as a
>     library and you have a custom flag encoder anyway.
>
>     Regards,
>     Peter
>
>
>     On 28.05.2015 20:14, John Zhao wrote:
>>     Hi,
>>
>>     I have a project which use GH as a library.
>>     I have implemented my own flag encoder, like xxxFlagEncoder.
>>     I don't figure out a good way to initialize it, except to change
>>     the EncodingManger to insert xxxFlagEncoder on parseEncoderString().
>>     I think it's better the change the way EncodingManger initialize
>>     all the flagEncoders.
>>     EncodingManger can use reflection to find the class or
>>     flagEncoder from its name, if we standardize the name and
>>     toString method.
>>
>>     Do you think it's a good idea, or there is a better way? 
>>

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