Pass custom parameter in web-api to FlagEncoder

Open Source Routing Engine
1

Hi,

Is it possible to pass custom parameters via the web-api to a custom FlagEncoder? For example, I’d like to pass parameters like this: http://mygraphhopper:8989/route?point=12.3456789,9.87654321&point=21.3456789,10.87654321&routing.ch.disable=true**&max_speed=80&rain=1**

In my custom FlagEncoder I’d then calculate the time using the max_speed value and for example add some penalty because of rain=1.
The reason behind this is that I want to allow passing differnt speeds to Graphhopper for different vehicles and can’t create a new profile for every possible scenario as I will probably end up with more than just two additional URL parameters. Is there a way to achieve this? Thanks!

2

It is already automatically done and you just need to pass a map to the constructor of your custom weighting. See the GenericWeighting and the usage of the PMap. Maybe this weighting and the DataFlagEncoder are already good for your other requirements?

3

BTW: your own parameters are in the GHRequest.getHints().

4

Thank you both very much for the answers!

I have to admit that I’m not that proficient with Java and my last Java project was a few years ago but I’m eager to look into the GenericWeighting. Once, I figured out how it exactly works I’m happy to report back and also ask about the requirements I have problems with. But this might take me a few days.

Have a nice weekend!!