[rules-users] Map using from constraint

[Paul Ryan]

Hi all,

Is there a way using the 'from' constraint to get the values of a map(the implementations of java.lang.Map eg HashMap, TreeMap, etc) into a constraint parameter, and if so can someone please give an example. Below is the way I've been trying, without success, to get a value based on a key.

import my.package.MyFact
import java.util.Map.Entry
rule "Find with map"
                when
                                $fact : MyFact($paramMap : paramMap)
                                $myValue : Entry(key == "mykey1") from $paramMap
                Then
// Sudo code...
                                <use $myValue.getValue()>
end

Paul Ryan
Software Architect
Product Engineering
InfoTrust Group, Inc.

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