source: src/main/java/bargainingchips/actions/Offer.java@ 318

package bargainingchips.actions;

import bargainingchips.Bundle;
import bargainingchips.BundleBuilder;

/**
 * An offer has two parts: (1) a bundle or null, (2) a message code: `bid', `accept', `breakoff', or `end'.
 * 
 * Immutable.
 */
public class Offer 
{
        /** 
         * Message codes: 
         * (1) `bid' [body contains a bundle], 
         * (2) `accept' [agree with the deal (based on the rules); null body], 
         * (3) `breakoff' [propose to quit the negotiation; null body]
         * 
         * Special:
         * (4) `end' [poison message to signal the agents that the negotiation is over; 
         *     null body for no agreement, bundle body for agreement]
         */
        private final OfferType type; 
        private final Bundle bundle;
        
        /**
         * Creates an offer. Bundle and OfferType are immutable and therefore so is Offer.
         */
        public Offer(Bundle b, OfferType t)
        {
                bundle = b;
                type = t;
        }

        public Offer(Offer o)
        {
                this(o.bundle, o.type);
        }
        
        /**
         * Creates a bid. Bundle is immutable and therefore so is Offer.
         */
        public Offer(Bundle b)
        {
                this(b, OfferType.BID);
        }

        /**
         * @return the proposal
         */
        public Bundle getBundle() 
        {
                return bundle;
        }
        
        @Override
        public String toString() 
        {
                if (type != OfferType.BID)
                        return type.toString();
                else
                        return type.toString() + ": " + bundle.toString();
        }
        
        public static Offer getSampleOffer(int qty)
        {
                return getSampleOffer("Red", qty);
        }
        
        /**
         * Just a sample example of an offer
         */
        public static Offer getSampleOffer(String color, int qty)
        {
                Bundle bundle = new BundleBuilder()
                                .addStack(color, 7.0, qty)
                                .build();
                return new Offer(bundle);
        }
        
        public boolean isBid() 
        {
                return type == OfferType.BID;
        }
        
        public boolean isBreakoff() 
        {
                return type == OfferType.BREAKOFF;
        }

        public boolean isAccept() 
        {
                return type == OfferType.ACCEPT;
        }
        
        public boolean isEnd() 
        {
                return type == OfferType.END;
        }
        
        public boolean isAgreement()
        {
         return isEnd() && bundle != null;
        }
        
        public boolean isDisagreement()
        {
         return isEnd() && bundle == null;
        }
}