Below is the drl file package com.vtech.ruleengine.module.rulemanagermodule import com.vtech.ruleengine.module.rulemanagermodule.RuleAttributes; import java.util.Map; rule "Rule_dec_1" dialect "mvel" when $a : RuleAttributes() m : RuleAttributes ( eval( ($a.getValues().get("AdultFare") - $a.getValues().get("InfantFare")) < ($a.getValues().get("ChildFare") + $a.getValues().get("InfantFare") ) ) then eval($a.getValues().put("GrossFare", 500)) end Follwing is the way i am using drrols final StatefulSession ruleStateSession = ruleBase.newStatefulSession(); ruleStateSession.addEventListener( new DebugAgendaEventListener() ); ruleStateSession.addEventListener( new DebugWorkingMemoryEventListener() ); RuleAttributes objRuleattri = new RuleAttributes((HashMap<String, Object>)_hmListBean); ruleStateSession.insert(objRuleattri); ruleStateSession.fireAllRules(); Note : RuleAttributes is a class where i set getter and setter for hashmap Below is the error message that i get : [9,0]: unknown:9:0 mismatched token: [@122,385:388='then',<61>,9:0]; expecting type RIGHT_PAREN ERROR 1 ::getCause::: null ERROR 2 ::getLocalizedMessage::: Unable to compile drl ERROR 3 ::getMessage::: Unable to compile drl ERROR 4 ::toString::: java.lang.RuntimeException: Unable to compile drl Gross VAlue ::::: 0 java.lang.RuntimeException: Unable to compile drl It will be very helpful is anyone of you rectify my mistake or tell me any other way to use Hashmap in drl file. I am using hashmap, since variable in my application varies hence cannot define fixed Bean structure. ----- Regards, :working:Nikhil -- View this message in context: http://www.nabble.com/Using-Hashmap-in-drl-files......-tp20355904p2035590... Sent from the drools - user mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users