Hi, I'm inserting an Object calld ClassA into the working memory. Which has got it's students in an ArrayList Like this... public class ClassA { private String RoomNo; private ArrayList<Student> students; ... } public class Student { private String name; private String rollNo; ... } Now, i've to write a rule to find a particular student with his role number and fetch his name to make some decisions. I don't know to write a rule to access an Object's data member of type ArrayList and find a match. Please help. Thanks in advance. _ _ _ _ |. | | ||_|| (_||| \/ Whoever wants to be happy, let him be so: of tomorrow there's no knowing Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ********** DISCLAIMER ********** Information contained and transmitted by this E-MAIL is proprietary to Sify Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail & notify us immediately at admin(a)sifycorp.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

You have 2 simple approaches: 1. Insert all your Students as facts and create regular rules like /Student(name == 'something')/ 2. Use the /from/ keyword: /$c: ClassA () Student(name == "something") from $c.students/ Best Regards, XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti - Developer @ http://www.plugtree.com <http://www.plugtree.com> - Blog @ http://ilesteban.wordpress.com On Mon, Dec 27, 2010 at 5:23 AM, Murali Venugopal <murali.venugopal(a)sifycorp.com <mailto:murali.venugopal@sifycorp.com>> wrote: Hi, I'm inserting an Object calld ClassA into the working memory. Which has got it's students in an ArrayList Like this... public class ClassA { private String RoomNo; private ArrayList<Student> students; ... } public class Student { private String name; private String rollNo; ... } Now, i've to write a rule to find a particular student with his role number and fetch his name to make some decisions. I don't know to write a rule to access an Object's data member of type ArrayList and find a match. Please help. Thanks in advance. _ _ _ _ |. | | ||_|| (_||| \/ Whoever wants to be happy, let him be so: of tomorrow there's no knowing Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ********** DISCLAIMER ********** Information contained and transmitted by this E-MAIL is proprietary to Sify Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail & notify us immediately at admin(a)sifycorp.com <mailto:admin@sifycorp.com> _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users