source: src/main/java/agents/UIAgent.java

package agents;

import javax.swing.JOptionPane;

import genius.core.Agent;
import genius.core.Bid;
import genius.core.SupportedNegotiationSetting;
import genius.core.actions.Accept;
import genius.core.actions.Action;
import genius.core.actions.EndNegotiation;
import genius.core.actions.Offer;
import genius.core.utility.AdditiveUtilitySpace;
import genius.core.utility.Evaluator;

/**
 * Uses {@link Evaluator}s and therefore requires {@link AdditiveUtilitySpace}
 * 
 * @author W.Pasman, modified version of Dmytro's UIAgent
 * 
 */
public class UIAgent extends Agent {
        private Action opponentAction = null;
        private EnterBidDialog ui = null;
        private Bid myPreviousBid = null;

        /** Creates a new instance of UIAgent */
        @Override
        public String getVersion() {
                return "1.0";
        }

        /**
         * One agent will be kept alive over multiple sessions. Init will be called
         * at the start of each nego session.
         */

        @Override
        public void init() {
//              System.out.println("init UIAgent");

//              System.out.println("closing old dialog of ");
                if (ui != null) {
                        ui.dispose();
                        ui = null;
                }
//              System.out.println("old  dialog closed. Trying to open new dialog. ");
                try {
                        ui = new EnterBidDialog(this, null, true,
                                        (AdditiveUtilitySpace) utilitySpace, null);
                } catch (Exception e) {
                        System.out.println("Problem in UIAgent2.init:" + e.getMessage());
                        e.printStackTrace();
                }
//              System.out.println("finished init of UIAgent2");
        }

        @Override
        public void ReceiveMessage(Action opponentAction) {
                this.opponentAction = opponentAction;
                if (opponentAction instanceof Accept)
                        JOptionPane.showMessageDialog(null,
                                        "Opponent accepted your last offer.");

                else if (opponentAction instanceof EndNegotiation)
                        JOptionPane.showMessageDialog(null,
                                        "Opponent canceled the negotiation session");
                else if (opponentAction instanceof Offer) {
                        try {
                                ui = new EnterBidDialog(this, null, true,
                                                (AdditiveUtilitySpace) utilitySpace,
                                                ((Offer) opponentAction).getBid());
                        } catch (Exception e) {
                                System.out
                                                .println("failed to initialize the UI with new offer!");
                                e.printStackTrace();
                        }
                }
                return;
        }

        @Override
        public Action chooseAction() {
                Action action = ui.askUserForAction(opponentAction, myPreviousBid);
                if ((action != null) && (action instanceof Offer))
                        myPreviousBid = ((Offer) action).getBid();
                return action;
        }

        public boolean isUIAgent() {
                return true;
        }

        @Override
        public SupportedNegotiationSetting getSupportedNegotiationSetting() {
                return SupportedNegotiationSetting.getLinearUtilitySpaceInstance();
        }

        @Override
        public String getDescription() {
                return "Simple human user interface to place bids";
        }
}