[rules-users] facts custom sort

[Wolfgang Laun]

If you would use what I posted it would work; it does with Drools 5.2.0.

If you change it so that it is incorrect then don't put the blame on me.

-W

On 1 December 2011 12:02, Syargey <Syargey at tut.by> wrote:
> But I didn't check when I answered:
> [ERR 101] Line 34:31 no viable alternative at input ')' in query
> sortFactsQuery1 in pattern TreeMap
>
> I tried:
>
> query sortFactsQuery1
>        $tm: TreeMap()
>                from accumulate( $f: Fact(),
>                     init( TreeMap map = new TreeMap(); ),
>                   action( map.put(factKey($f), $f); ),
>                   reverse( map.remove(factKey($f)); ),
>                   result( map ) )
>    $sortedFacts: Collection() from $tm.values()
> end
>
> It doesn't return any results.
>
> But the following query works:
>
> query sortFactsQuery2
>        $tm: TreeMap()
>                from accumulate( $f: Fact(),
>                     init( TreeMap map = new TreeMap(); ),
>                   action( map.put(factKey($f), $f); ),
>                   reverse( map.remove(factKey($f)); ),
>                   result( map ) )
>    $sortedFacts: List()
>        from accumulate( $f: Fact() from $tm.values(),
>                        collectList( $f ) )
> end
>
>
>
>
> --
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