[udig-devel] Choosing a Renderer based on metrics

[Jody Garnett <jgarnett@xxxxxxxxxxxxxxx>]

I am setting down the ground work for choosing a renderer for one or 
more layers ...

Here is a code snipit - Jesse am I on the right track here?

>     // Magic is defined as:
>     // 1) maximize accuracy - ie ability to render what the user says 
> on the style blackboard, rename "appearance"?
>     // 2) minimize latency - lets use real units for this one guys?
>     // 3) maximize thoughput - lets use real units for this one guys?
>     //
>     // Note we could of chosen total response time, but low latency is 
> worth more?
>     //
>     static final Comparator magic = new Comparator(){
>         public int compare( Object a, Object b ) {
>             RenderMetrics m1 = (RenderMetrics) a;
>             RenderMetrics m2 = (RenderMetrics) b;            
>             if( m1.accuracy() > m2.accuracy() ) return -1;
>             if( m1.accuracy() < m2.accuracy() ) return 1;            
>             if( m1.latency() < m2.latency() ) return -1;
>             if( m1.latency() > m2.latency() ) return 1;
>             if( m1.throughput() > m2.throughput() ) return -1;
>             if( m1.throughput() < m2.throughput() ) return 1;
>             return 0;
>         }                
>     };

This comparator is used to sort a TreeSet of available RenderMetrics for 
a Layer.