I'm exploring the possibility of using a dynamic bean as fact object as my fact object is very dynamic in nature. I came across posts where people had recommended using BeanGenerator from CGLIB. This blog does a very good job of explaining the details of classloader etc. http://blog.athico.com/2006/12/dynamically-generated-class-beans-as.html have the lowest lerning curve to achieve this. I have the below sample on creating a dynamic bean with CGLIB BeanGenerator bg = new BeanGenerator(); bg.setSuperclass(FactContextPlaceHolder.class); bg.setNamingPolicy(new net.sf.cglib.core.NamingPolicy() { public String getClassName(String prefix, String source, Object key, Predicate names) { return prefix + "Impl"; } }); bg.addProperty("foo", Double.TYPE); g.addProperty("bar", String.class); FactContextPlaceHolder beanInst = (FactContextPlaceHolder)bg.create(); Here com.drools.test.FactContextPlaceHolder is set as super class and the generated class is obtained as com.drools.test.FactContextPlaceHolderImpl I have two basic question I am unable to find some answers on. 1) Once I create an object, how do I actually set the state of this object with fact values before setting it as fact object to drools session? In the above example how do I set value of foo to "foot-test1" and value of bar to "bar-test1" on the beanInst. 2) In DRL if I set the package to some path say com.drools.test Should I then use FactContextPlaceHolderImpl as my fact Object? Thanks Kumar