public class OntologicalAction implements SemanticAction {
  public OntologicalAction( SemanticCapabilities myCapabilities,
                            Term actionPattern,
                            Formula postconditionPattern,
                            Formula preconditionPattern) {...}
  ...
  public void perform(OntoActionBehaviour behaviour) {
    behaviour.setState(SemanticBehaviour.SUCCESS);
  }
}

============================================

class BookSellerCapabilities extends SemanticCapabilities {
  class SellBookAction extends OntologicalAction() {
    public SellBookAction() {
      super(BookSellerCapabilities.this, 
            "(SELL_BOOK :buyer ??buyer :isbn ??isbn :price ??price)",
            "(not (for_sale ??isbn ??actor))", // postcondition
            "(for_sale ??isbn ??actor)"); // precondition
    }

    public void perform(OntoActionBehaviour behaviour) {...}
  }
  ...
  protected SemanticActionTable setupSemanticActions() {
    SemanticActionTable t = super. setupSemanticActions();
    t.addSemanticAction(new SellBookAction());
    return t;
  }
}

=============================================

Term isbn;
Term buyer;
Term price;

public void perform(OntoActionBehaviour behaviour) {
  try {
    switch (behaviour.getState()) {
    case OntoActionBehaviour.START:
      isbn = getActionParameter("isbn");
      buyer = getActionParameter("buyer");
      price = getActionParameter("price");
      behaviour.setState(OntoActionBehaviour.RUNNING);
      break;
    case OntoActionBehaviour.RUNNING:
      System.out.println("Bingo! " + getAgentName() + " sells the book " + isbn + " to " + buyer + " at " + price + " euros ");
      behaviour.setState(OntoActionBehaviour.SUCCESS);
      break;
    }
  }
  catch (Exception e) {
    behaviour.setState(OntoActionBehaviour.EXECUTION_FAILURE);
  }
}