source: src/main/java/genius/core/actions/DefaultAction.java

package genius.core.actions;

import genius.core.AgentID;
import genius.core.Bid;

/**
 * @author Tim Baarslag and Dmytro Tykhonov
 *
 */
public abstract class DefaultAction implements Action {
        protected AgentID agentID;

        /**
         * Constructor which sets the agentID of an agent.
         * 
         * @param agentID
         *            of the agent which created the action.
         */
        public DefaultAction(AgentID agentID) {
                this.agentID = agentID;
                if (agentID == null) {
                        throw new IllegalArgumentException("AgentID =null");
                }
        }

        @Override
        public AgentID getAgent() {
                return agentID;
        }

        /**
         * Enforces that actions implements a string-representation.
         */
        public abstract String toString();

        /**
         * Method which returns the bid of the current action if it is of the type
         * Offer or else Null.
         * 
         * @param currentAction
         *            of which we want the offer.
         * @return bid specifies by this action or null if there is none.
         */
        public static Bid getBidFromAction(Action currentAction) {

                Bid currentBid = null;
                if (currentAction instanceof EndNegotiationWithAnOffer) // RA
                        currentBid = ((EndNegotiationWithAnOffer) currentAction).getBid();
                else if (currentAction instanceof Offer)
                        currentBid = ((Offer) currentAction).getBid();

                return currentBid;
        }

}