[rules-users] using eval(function(this))) in rule LHS

Hi all, I have the a drl similar to the following drl: package com.checkpoint.correlation.impl.drools.package1; import java.util.Date import java.util.HashMap import com.checkpoint.correlation.impl.drools.Log import com.checkpoint.correlation.impl.drools.CorrelatedEvent global com.checkpoint.correlation.server.EventsHandler externalEventsHandler; function boolean filter(Log log) { return (log.fieldsMap.get("port")!= null && (!log.fieldsMap.get("product").toString().equals("-1"))); } function String calcSeverity(Log log) { return "High"; } declare Log @role( event) end declare CorrelatedEvent @role( event) @expires( 10s ) end // this rule will create a "Port Scan" event if none exist for this group-by values rule "Create Port Scan Event" dialect "java" no-loop when $log : Log(eval(filter(this))) accumulate(Log(eval(filter(this)) , this after[0s,5s] $log, fieldsMap.get("src") == $log.fieldsMap.get("src") , fieldsMap.get("dst") == $log.fieldsMap.get("dst"), $port : fieldsMap.get("port")); $portSet : collectSet($port); $portSet.size > 2 ) accumulate( CpLog(eval(filter(this)), this after[0s,5s] $log, fieldsMap.get("src") == $log.fieldsMap.get("src") , fieldsMap.get("dst") == $log.fieldsMap.get("dst"), $portSet.contains(fieldsMap.get("port")), $marker : fieldsMap.get("marker")); $markerSet : collectSet($marker)) not CorrelatedEvent(getId() == "portScan" , groupByFieldsMap.get("src") == $log.fieldsMap.get("src") , groupByFieldsMap.get("dst") == $log.fieldsMap.get("dst")) then System.out.println("port scan"); System.out.println(drools.getRule().getId()); CorrelatedEvent $ce = new CorrelatedEvent("portScan"); $ce.groupByFieldsMap.put("src", $log.fieldsMap.get("src")); $ce.groupByFieldsMap.put("dst", $log.fieldsMap.get("dst")); insert($ce); HashMap<String,Object> fieldsMap = new HashMap<String,Object>(); fieldsMap.put("src",$log.fieldsMap.get("src")); fieldsMap.put("dst",$log.fieldsMap.get("dst")); fieldsMap.put("cu_rule_severity", calcSeverity($log)); fieldsMap.put("markers",$markerSet.toString()); externalEventsHandler.handleEvent(fieldsMap); end when I compile it, I am getting the error "Cannot use this in a static context". This is because the use of filter(this). I know that in this example, I can write my conditions inside the fact, but I have more complicated cases, so I prefer to use a function. So, how can I use a function with the fact being processed? Thanks!