I am new to drools and have been struggling with this rule.
$subject: RqTargetType contains a list of RqAttrib objects
$resource: RqTargetType also contains its own list of RqAttrib objects
$subject in a certain role has to be selected based on (attribType ==
"subject", designator == "subject.role", attribValue == "patient")
$subjectId is to be extracted from another attribute (attribType ==
"subject", designator == "subject.id", $subjectId: attribValue)
We then need to select a resource that has an attribute to match this
$subjectId (attribType == "resource", designator == "resource.patient",
attribValue == $subjectId )
Here is the rule I wrote:
rule "Patient Access Rule"
#conditions
RqTargetType( $subjectAttribs : rqAttribs )
RqAttrib (attribType == "subject", designator ==
"subject.role",
attribValue == "patient") from $subjectAttribs
RqAttrib (attribType == "subject", designator == "subject.id",
$subjectId: attribValue) from $subjectAttribs
$resource: RqTargetType( )
RqAttrib (attribType == "resource", designator ==
"resource.patient",
attribValue == $subjectId ) from
$resource.getRqAttribs()
RqAttribute (attribType == "resource", designator ==
"resource.id",
$resourceId: attribValue ) from $resource.getRqAttribs
then
#actions
System.out.println( "resource: " + $resourceId );
System.out.println( "subject: " + $subjectId );
System.out.println( "Patient Access rule decision: Permit" );
decisions.add("Permit");
retract($subject);
end
I keep on getting "no viable alternative at input" error.
Tried stripping the code so that only the following was left and still got
the error:
RqTargetType( $subjectAttribs : rqAttribs )
RqAttrib (attribType == "subject", designator ==
"subject.role",
attribValue == "patient") from $subjectAttribs
[ERR 101] Line 25:2 no viable alternative at input 'RqTargetType' in rule
"Patient Access Rule"
Then tried this with similar results.
$subject: RqTargetType()
$subjectAttrib: RqAttrib (attribType == "subject", designator ==
"subject.role",
attribValue == "patient") from $subject.getRqAttribs()
no viable alternative at input '$subject' in rule "Patient Access Rule"
Any help will be much appreciated.
Thank you and have a great day.
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