[rules-users] Problem with 'contains'

[Wolfgang Laun]

java.util.Map does not implement Collection, which ought to be implemented
by the field to which you apply the "contains" operator.

If "contains" works with a Map, it is either a bug or not well defined or
both.

To test whether a string  is a key (or value) in a Map, use
(a) if the string is a field: string memberOf (map.keySet())
(b) eval( map.containsKey(string) )

-W


On 29 October 2011 13:50, hdrews <heinz.drews at gmail.com> wrote:

> I'm using in a rule the 'contains' operator against a Map<String,String>.
> The method 'containsKey' on Map is invoke twice, first with the key then
> with the value associated to the key.
>
> The rule is evaluated to 'false'.
>
> What can I do to prevent this behavior?
>
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