[rules-users] Iterating string objects inside Arraylist

I am a novice in Drools, sorry if this question is trivial and has already been discussed. I couldn't find the direct method for implementing the below behavior. I have a class like this. public class Account { public int balance; public String id; public List<String> types; // getter setters } I am trying to check the following: Accounts having balance greater than $100 and types containing both Savings and Checking. // Creating sample Facts in Java main Account account = new Account(); account.setBalance(100); account.setId("A1"); List<String> temp = new ArrayList<String>(); temp.add("Savings"); temp.add("Checking"); account.setTypes(temp); // Creating rules rule "Sample" when bat : Account(balance == 100) then if (bat.getTypes().contains("Savings") && bat.getTypes().contains("Checking")){ System.out.println("I got this"); } end Is there more proficient ways to do this?? like checking the contents of the arraylist (types as per the above example) in rule i.e. in "when" instead of doing it in "then" ?? Much appreciate your answers. Thank you! **************** CAUTION - Disclaimer ***************** This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***