How to execute external jar from seam's home object

[valatharv]

How can I execute external jar located outside seam home object.
What will be the best approach...

Example : I need to call jar from persist() function....
@Name("ExperimentHome")
public class ExperimentHome extends EntityHome<Experiment> {
public String persist(){     
  String persistResult = super.persist();

  //CALL EXTERNAL JAR
 
  return persistResult;
}