sourceafBedSheet::ErrProcessors.fan

using afIoc::StrategyRegistry

** Holds a collection of `ErrProcessor`s.
** 
** pre>
**   @Contribute { serviceType=ErrProcessors# }
**   static Void contributeErrProcessors(MappedConfig conf) {
**     conf[Err#] = CatchAllErrHandler()
**   }
** <pre
** 
** @uses a MappedConfig of 'Type:ErrProcessor' where 'Type' is a subclass of 'Err' or a mixin.
const mixin ErrProcessors {
    
    @NoDoc
    abstract Obj processErr(Err err)
}

internal const class ErrProcessorsImpl : ErrProcessors {

    private const StrategyRegistry errProcessorStrategy
    
    internal new make(Type:ErrProcessor errProcessors) {
        errProcessors.keys.each |type| {
            if (type.isClass && !type.fits(Err#))
                throw BedSheetErr(BsMsgs.errProcessorsNotErrType(type))
        }
        this.errProcessorStrategy = StrategyRegistry(errProcessors)
    }
    
    override Obj processErr(Err err) {
        get(err.typeof).process(err)
    }

    private ErrProcessor get(Type errType) {
        return errProcessorStrategy.findBestFit(errType)
    }
}